| Qualification of Trivalent Chromate as a Hexavalent Chromate Alternative for Propellant and Cartridge Actuated Devices |
28-Jul-2008 |
62 pages |
| Authors:
Harry L Archer; NAVAL SURFACE WARFARE CENTER INDIAN HEAD DIV MD
|
 | A low toxicity trivalent chromate conversion coating (TCP) over a zinc-phosphate conversion coat was qualified to replace toxic hexavalent chromate conversion coating (CCC) on zinc-nickel plated steel. Unpainted test panels exhibited at least 42 days of resistance to cyclic salt fog. These panels lasted at least 4 days when subjected to cyclic sulfur dioxide and cyclic salt fog testing with full red rust evident on the seventh day. Painted and ... |
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| Modeling of Flowing Plasmas and Pulse Power Schemes for O2(1Delta) Production for Chemical Lasers |
19 JAN 2008 |
50 pages |
| Authors:
Mark J. Kushner; IOWA STATE UNIV AMES DEPT OF ELECTRICAL ENGINEERING
|
| The objectives of the research program were met. Significant progress was made in improving our understanding of the plasma kinetics of O2(1Delta) production for pumping of eCOILs. Advances were made in 3 areas: (1) pulse power schemes, (2) use of additives and (3) high pressure operation. Methods and scaling laws were developed to optimize the yield of O2(1Delta) in flowing plasmas in each of these areas. |
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| Portable Chemical Sterilizer for Microbial Decontamination of Surgical Instruments, Fruits and Vegetables, and Field Feeding Equipment |
01 NOV 2006 |
9 pages |
| Authors:
C. J. Doona; F. E. Feeherry; K. Kustin; M. A. Curtin; D. G. Baer; ARMY NATICK RESEARCH DEVELOPMENT AND ENGINEERING COMMAND MA NATICK SOLDIER CENTER
|
| The Portable Chemical Sterilizer (PCS) is a revolutionary biomedical sterilization technology that provides the capability for portable, power-free, point-of-use sterilization to meet the Army's Far-Forward Surgical Teams (FSTs) needs for the rapid mobility, energy-independence, on-site sterilization of surgical instruments. The PCS chemically generates chlorine dioxide and inactivates infectious foodborne pathogens (Escherichia coli, Listeria monocytogenes, and Staphylococcus aureus), and tough-to-kill bacterial spores (Bacillus stearothermophilus, Bacillus atrophaeus) on the surfaces of contaminated ... |
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| Development of Bicarbonate-Activated Peroxide as a Chemical and Biological Warfare Agent Decontaminant |
30 JUN 2006 |
48 pages |
| Authors:
David E. Richardson; FLORIDA UNIV GAINESVILLE DEPT OF CHEMISTRY
|
| Several projects were completed in the development of bicarbonate-activated peroxide (BAP) and other chemistry for the decontamination of chemical and biological warfare agents. The mechanism of formation of the active oxidant, peroxymonocarbonate, has been investigated in detail. New surfoxidants (oxidative surfactant formulations) have been explored. The Mn-catalyzed oxidations by BAP solutions have been investigated to define the active oxidant species in kinetic studies. Initial investigations into new methods for oxidation ... |
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| Surface Oxidation Study of Uranium Dioxide Under Wet and Dry Conditions |
MAR 2005 |
184 pages |
| Authors:
Gary T. Brett; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The surface oxidation of pressed uranium dioxide (UO2) powder under controlled environmental conditions and the oxidation and reduction of pressed uranium trioxide (UO3) powder are presented. This is a continuing research project in the investigation of the oxidation of UO2 powder using Photoluminescence (PL) Spectroscopy. UO2 particles exposed to the ambient atmosphere will oxidize into a number of chemical complexes (specifically hydrates, hydroxides, and carbonates). During certain of these oxidation ... |
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| National Acid Precipitation Assessment Program Report to Congress: An Integrated Assessment |
2005 |
98 pages |
| Authors:
Tamara Saltman; Robert Cook; Mark Fenn; Richard Haeuber; Bryan Bloomer; Chris Eagar; Tom Huntington; B.J. Cosby; Ann Watkins; Sandy McLaughlin; EXECUTIVE OFFICE OF THE PRESIDENT WASHINGTON DC NATIONAL SCIENCE AND TECHNOLOGY COUNCIL
|
| Acid deposition, more commonly known as acid rain, occurs when emissions of sulfur dioxide (SO2) and nitrogen oxides (NOx) react in the atmosphere (with water, oxygen, and oxidants) to form various acidic compounds. These acidic compounds then fall to earth in either a wet form (rain, snow, and fog) or a dry form (gases, aerosols, and particles). Prevailing winds transport the acidic compounds hundreds of miles, often across state and ... |
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| Semiconductor Nanowire-Based FETs as Electronically Tunable Catalysts |
DEC 2004 |
|
| Authors:
M. Moskovits; Y. X. Zhang; Y. Lilach; A. Kolmakov; CALIFORNIA UNIV SANTA BARBARA
|
 | Nanowires and nanotubes have shown remarkable electronic properties when configured either as simple current/voltage impedance elements or as field- effect transistors. Their very high surface-to-volume ratio makes them ideal sensors in situations where the gaseous species adsorbing on their surface donate or extract charge, in turn affecting the nanowire's conductivity. By reversing the process, nanowires configured as FETs potentially allow the surface chemistry, and hence the catalytic properties of the ... |
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| Portable Decontamination and Sterilization System |
17 NOV 2004 |
23 pages |
| Authors:
William Bell; Suzanne Smerjac; Bryan Smith; TDA RESEARCH INC WHEAT RIDGE CO
|
| TDA Research, Inc., (TDA) is developing a portable system to generate chlorine dioxide, which can be used for biodecontamination of small items and to sterilize medical and dental instruments in austere environments. Prototype systems can effectively sterilize both biological indicators and medical instruments inoculated with bacterial spores. At room temperature we found D-values (time for 90% kill) consistent with a sterilization cycle time of less than 30 minutes. The system ... |
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| Phase III: Laboratory Investigation of Portable Instruments for Submarine Air Monitoring |
20 OCT 2004 |
35 pages |
| Authors:
Thomas W. Evans; Julianne M. Werner; Susan L. Rose-Pehrsson; Mark H. Hammond; NAVAL RESEARCH LAB WASHINGTON DC
|
| Drager tubes are currently used to supplement the atmosphere analysis measurements made aboard U.S. Navy submarines. The submarine fleet has requested that these tubes be replaced with a less labor intensive measurement system. Due to recent developments in gas sensing instrumentation, it is possible to replace many of the existing detectors with instruments that will incorporate more than one sensor at a time. This report is a continuation of an ... |
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| Design and First Operations of the Lineate Imaging Near-Ultraviolet Spectrometer (LINUS) |
DEC 2002 |
55 pages |
| Authors:
Jean M. Gray; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF PHYSICS
|
| Spectral imagery provides a new technology for target detection, defeat of camouflage, concealment and deception, and detection of chemical/ biological agents in the atmosphere. The Lineate Imaging Near Ultraviolet Spectrometer (LINUS) is designed to image a narrow passband in the UV portion of the Electromagnetic spectrum. The imaging spectrometer views a 0.5 degree vertical strip, while observing a 20-40 nm wide band currently centered at 300 nm. The 512 x ... |
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| Fundamental Battery Studies |
JAN 2002 |
19 pages |
| Authors:
J. B. Goodenough; TEXAS UNIV AT AUSTIN CENTER FOR MATERIALS SCIENCE AND ENGINEERING
|
| The objectives of this grant were: (1) to analyze the data taken by the Army Research Laboratory (ARL) on the operation of a Saft lithium-ion battery system being developed for pulsed-power applications; (2) to suggest an experimental strategy for determining the relative contributions of electronic and ionic processes in the initial discharge so that a decision could be made either to stop the project or to understand how to optimize ... |
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| Characterization of Self-Assembled SnO2 Nanoparticles for Fabrication of a High Sensitivity and High Selectivity Micro-Gas Sensor |
NOV 2001 |
|
| Authors:
R. C. Ghan; Y. Lvov; R. S. Besser; LOUISIANA TECH UNIV RUSTON INST FOR MICROMANUFACTURING
|
| In order to refine further the material technology for tin-oxide based gas sensing we are exploring the use of precision nanoparticle deposition for the sensing layer. Layers of SnO2 nanoparticles were grown on Quartz Crystal Microbalance (QCM) resonators using the layer-by-layer self-assembly technique. Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM). and Electron Diffraction Pattern (EDP) analyses were performed on the self-assembled layers of SnO2 nanoparticles. The results showed that ... |
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| Role of Oxide Additives in Stabilizing Zirconia for Coating Applications |
SEP 2001 |
42 pages |
| Authors:
Jeffrey J. Swab; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| Zirconium dioxide (ZrO(2)) is a ceramic with a variety of industrial applications as a refractory material, and it is used in electronic packaging, biomedicine, and advanced engines. Unfortunately, pure zirconia undergoes a destructive phase transformation that severely limits its uses. However, some oxide additives have been found to control this transformation and ultimately lead to significant improvements in the material. This report summarizes the role that oxide additives play in ... |
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| Chlorine Dioxide: The State of Science, Regulatory, Environmental Issues, and Case Histories |
16 FEB 2001 |
16 pages |
| Authors:
Dennis T. Burton; Daniel J. Fisher; WYE RESEARCH AND EDUCATION CENTER QUEENSTOWN MD
|
| The use of chlorine by electric utilities and other surface water users to inhibit biofouling and the chlorination of wastewater by POTWs to eliminate the discharge of pathogenic organisms are widespread practices. A number of surface water users in the Great Lakes region recently expressed an interest in using chlorine to control the zebra mussel (Dreissena polymorpha) which was introduced from Europe in the mid-1980s. It is well known, however, ... |
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| Industrial Stack Evaluation With Ground-Based Passive FT-IR Spectrometry |
JAN 2001 |
394 pages |
| Authors:
Roger J. Combs; Robert B. Knapp; Robert T. Kroutil; Mark J. Thomas; EDGEWOOD CHEMICAL BIOLOGICAL CENTER ABERDEEN PROVING GROUND MD
|
| The methodology for producing absorbance and transmittance spectra with a passive Fourier transform infrared (FT-IR) spectrometer from an industrial stack and blackbody source is demonstrated. The knowledge of the stack temperature is shown to be key in generating the single-beam spectral ratio of differences for removal of instrumental effects from the absorbance and transmittance spectra. The difference removes self emission (i.e., offset) terms, and the ratio eliminates the responsivity (i.e., ... |
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| Development of a High Capacity Lithium-Ion Battery for a Navy Aircraft |
2000 |
13 pages |
| Authors:
Brian J. Stein; John W. Baker; Pinakin M. Shah; Nathan D. Isaacs; Bill Johnson; NAVAL AIR WARFARE CENTER AIRCRAFT DIV PATUXENT RIVER MD
|
| In response to the Navy's requirement for a lighter, higher capacity, secondary battery, Mine Safety Appliances (MSA) Company designed and built an experimental lithium-ion "drop-in" replacement battery for demonstration of its performance in the Pioneer aircraft. Lithium ion technology using a lithiated cobalt dioxide positive electrode, graphitized carbon negative electrode and liquid organic electrolyte has demonstrated a significant enhancement in performance over other rechargeable systems ... |
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| Operational and Calibration of the NPS Ultraviolet Imaging Spectrometer (NUVIS) in the Detection of Sulfur Dioxide Plumes |
DEC 1999 |
104 pages |
| Authors:
Stephen A. Marino; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The Naval Postgraduate School's Ultraviolet Imaging Spectrometer (NUVIS) is a hyperspectral sensor with a spectral response of 300 to 375 nanometers. This thesis research concentrates on the operation and calibration of NUVIS in the detection of effluent suliur dioxide (SO2) plumes. NUVIS is capable of detecting and quantifying SO2 emissions in the form of effluent smokestack plumes by exploiting SO2's unique Uv absorption signature. Laboratory ... |
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| Overcharge Protection in Ambient Temperature Lithium and Lithium-Ion Cells: A Literature Survey |
DEC 1998 |
16 pages |
| Authors:
Wishvender K. Behl; ARMY RESEARCH LAB ADELPHI MD
|
| This report summarizes a survey of the literature on in situ electrochemical methods to provide overcharge protection in ambient temperature lithium and lithium-ion cells. Among the various rechargeable lithium battery systems, only the lithium cells using solutions of inorganic salts such as LiAlCl4 or LiGaCl4 in sulfur dioxide as electrolytes were found to have inherent overcharge protection. For low-voltage lithium cells such as lithium/titanium disulfide, the survey identified a number ... |
|
| Organic and Polymeric Superconductors |
12 FEB 97 |
8 pages |
| Authors:
Robert M. Metzger; ALABAMA UNIV UNIVERSITY DEPT OF CHEMISTRY
|
| The synthetic chemistry of dithiadiazafulvalenes (DTDAF) was studied in detail: these one and two-electron donors, ore powerful than the well-known tetrathiafulvalenes (TTF, 1), but more chemically more tractable than the unstable tetraazafulvalenes, are a significant departure from ordinary organic donors, and therefore show promise in the search for new organic superconductors. A 2:5 complex of diphenyldiacetyldithiadiazafulvalene (O2Ac2DTDAF, 4c) with the electron acceptor tetracyanoquinodimethan (TCNQ, 11a), including one molecule of acetonitrile, ... |
|
| High Nitrogen Explosives. Part 2. Dibenzo-1 ,3a,4,6a- Tetraazapentalenes and Benzo-1 2,3,4-Tetrazine-1,3-Dioxides |
AUG 96 |
61 pages |
| Authors:
Karen L. Altmann; Lawrence H. Merwin; William P. Norris; William S. Wilson; Richard Gilardi; NAVAL AIR WARFARE CENTER WEAPONS DIV CHINA LAKE CA
|
| High nitrogen materials are sought as a potentially dense, powerful but insensitive explosive and propellant ingredients. Elucidation of the structure and chemistry of dibenzo-1 ,3a,4,6a-tetraazapentalenes has continued, with particular attention to a putative C12N12O12 derivative initially prepared at the University of New Orleans. This research contributed substantially to identification of the actual o-quinone hydrate structure, and explanation of the apparently anomalous explosive insensitivity of the material. Synthesis of the novel ... |
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| Atomic Layer Epitaxy of Group IV Materials: Surface Processes, Thin Films, Devices and Their Characterization |
JUN 96 |
25 pages |
| Authors:
Robert F. Davis; S. Bedair; N. A. El-Masry; Z. Sitar; S. K. Han; NORTH CAROLINA STATE UNIV AT RALEIGH
|
| The growth parameter, alpha, the ratio of the growth rates on (100) and (111) facets for diamond films deposited on Si and Ti by microwave plasma CVD has been studied using SEM micrographs. Different morphologies were generated on Si under different deposition conditions. The value of alpha increased with increasing temperature and increasing methane concentration, as expected. A value of alpha for Ti was not obtained due to the heavily ... |
|
| The Use of Continuous Emissions Monitoring To Track, Record, and Report Criteria Pollutant Emissions |
JUN 96 |
147 pages |
| Authors:
Daiva E. Edgar; Gerald T. DeWitt; Jearldine I. Northrup; CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN IL
|
| On 15 November 1990, President George Bush signed into law the Clean Air Act Amendments, which distinguish between: (1) 'air toxics' and (2) 'criteria pollutants.' Central energy plants (CEPs) like those found on military installations in the continental United States generate certain levels of this second class of pollutants and, by law, must be monitored. Most installations in the continental United States are actually regulated for pollution emissions by their ... |
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| Chemical Reactions of Heteroatom Organic Molecules at Metal Oxide Surfaces |
31 MAR 96 |
|
| Authors:
J. M. White; TEXAS UNIV AT AUSTIN DEPT OF CHEMISTRY AND BIOCHEMISTRY
|
| The research is in the area of chemical reactions on surfaces and deals with molecules and solids that model systems of technological and environmental significance to ARO. In particular, we study heteroatom organic adsorbates containing halogens, sulfur, oxygen, phosphorus and nitrogen. The fundamental surface chemical decomposition kinetics of selected molecules, especially simulants, are studied on metal and metal oxide substrates that model technological materials used to destroy and render them ... |
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| Photofragmentation Spectroscopy and Photodissociation Dynamics of Polyatomic Molecules |
01 MAR 96 |
23 pages |
| Authors:
Brad R. Weiner; PUERTO RICO UNIV RIO PIEDRAS DEPT OF CHEMISTRY
|
| The detailed reaction dynamics of several gas phase polyatomic systems has been established in this research at the Department of Chemistry at the University of Puerto Rico. Real time dynamics of sulfur monoxide photoelimination reactions have been studied by laser induced fluorescence spectroscopy of the nascent SO fragment on the B(3) sigma(-) - X(3) sigma(-) transition in the region of 237-310 nm. The following group of molecules has been studied: ... |
|
| Photodissociation Studies of Sulfur Oxides |
01 MAR 96 |
21 pages |
| Authors:
Brad R. Weiner; PUERTO RICO UNIV RIO PIEDRAS DEPT OF CHEMISTRY
|
| The detailed reaction dynamics of several gas phase polyatomic systems has been established in this research at the Department of Chemistry at the University of Puerto Rico. Real time dynamics of sulfur monoxide photoelimination reactions have been studied by laser induced fluorescence spectroscopy of the nascent SO fragment on the B(3)sigma (-) - X(3)sigma(-) transition in the region of 237-310 nm. The following group of molecules has been studied: Sulfur ... |
|
| Conceptual Study on Replacing the RAVEN Back Pack Radio Batteries with a Solid Polymer Fuel Cell |
AUG 95 |
|
| Authors:
Gregory A. Clark; DEFENCE SCIENCE AND TECHNOLOGY ORGANIZATION CANBERRA (AUSTRALIA)
|
| A conceptual study has demonstrated the technical possibility of replacing the RAVEN radio batteries with a solid polymer electrolyte fuel cell. The fuel cell would operate on air and stored hydrogen released from a metal hydride. The study revealed that the fuel cell power source offered logistical benefits over nickel cadmium batteries and potential cost savings over lithium sulphur dioxide batteries. The study suggests that methods of chemically generating hydrogen ... |
|
| Chemiluminescence Chemical Detection of Vapors and Device. |
10 JUL 1995 |
50 pages |
| Authors:
Gregory E. Collins; Susan L. Rose-Pehrsson; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A solid phase chemical sensor includes a polymer film which has a chemiluminescent reagent immobilized therein. The polymer film and chemiluminescent reagent are chosen to significantly enhance the selectivity of the sensor to the analyte in the gaseous phase to which the sensor is exposed. The sensor is then positioned so that, when exposed to the gaseous mixture, any chemiluminescence generated will be detected by a photomultiplier tube or other ... |
|
| Composite Polymer Electrolyte for Lithium Batteries |
MAR 95 |
17 pages |
| Authors:
Steve Slane; Mark Salomon; ARMY RESEARCH LAB FORT MONMOUTH NJ
|
| Composite polymer electrolyte films consisting of zeolite powders dispersed in poly(acrylonitrile)(PAN) based gels with lithium hexafluoroarsenate have been prepared and their electrochemical properties studied. Gel electrolytes prepared by adding lithium hexafluoroarsenate in propylene carbonate (PC) and ethylene carbonate (EC) mixtures with PAN have demonstrated ionic conductivities greater than 0.001 siemens per cm at room temperature and above. The addition of zeolite powders increased ionic conductivity at low temperatures due to ... |
|
| Lithium Ion Aqueous Cells |
FEB 95 |
19 pages |
| Authors:
Edward J. Plichta; Wishvender K. Behl; ARMY RESEARCH LAB FORT MONMOUTH NJ
|
| Lithium ion aqueous cells were investigated using lithium intercalating compounds as anodes and cathodes. The aqueous electrolyte consisted of 4 to 5 molar solutions of either lithium perchlorate or lithium nitrate which contained lithium hydroxide in millimolar amounts to make the solutions slightly basic with a pH of about 8.5. Several electrode combinations were evaluated using lithium intercalating compounds such as lithium cobalt oxide and lithium manganese oxide as cathodes ... |
|
| Functional Materials. Volume 2, Number 2, 1995 |
95 |
139 pages |
| Authors:
V. P. Seminozhenko; A. V. Tolmachev; Yu. S. Kaganovskii; UKRAINIAN SSR ACADEMY OF SCIENCES KIEV
|
| This program was designed so as to combine interests of chemists and physicists and the following topics were addressed by participants: Surface modification; Applications of modified surfaces for HPLC phases, adsorbents, catalysts, sensors etc.; Surface induced properties of systems; Chemical and physical processes on surfaces; Modern methods for surface analysis and characterization; Self assembly on solid materials. The scientific program consisted of lectures and poster presentations. The CPS-94 included special ... |
|
| Functional Materials. Volume 2, Number 1, 1995 |
95 |
167 pages |
| Authors:
V. P. Seminozhenko; A. V. Tolmachev; Yu. S. Kaganovskii; UKRAINIAN SSR ACADEMY OF SCIENCES KIEV
|
| This program was designed so as to combine interests of chemists and physicists and the following topics were addressed by participants: Surface modification; Applications of modified surfaces for HPLC phases, adsorbents, catalysts, sensors etc.; Surface induced properties of systems; Chemical and physical processes on surfaces; Modern methods for surface analysis and characterization; Self assembly on solid materials. The scientific program consisted of lectures and poster presentations. The CPS-94 included special ... |
|
| Simultaneous Gas-Chromatographic Determination of Four Toxic Gases Generally Present in Combustion Atmospheres |
SEP 94 |
12 pages |
| Authors:
Boyd R. Endecott; Donald C. Sanders; Arvind K. Chaturvedi; FEDERAL AVIATION ADMINISTRATION WASHINGTON DC OFFICE OF AVIATION MEDICINE
|
| Measurement of combustion gases produced by burning aircraft cabin materials poses a continuing limitation for smoke toxicity research. Since toxic effects of gases depend on both their concentrations and duration of exposures, frequent atmosphere sampling is necessary to define the concentration-time curve. A gas chromatographic method was developed for the simultaneous analyses of carbon monoxide (CO), hydrogen sulfide (H2S), sulfur dioxide (SO2), and hydrogen cyanide (HCN). The method utilized an ... |
|
| A Sensitivity Analysis of Upwelling Radiances in the 3-5 micrometers Region as a Function of Atmospheric Conditions |
17 JUN 94 |
28 pages |
| Authors:
David R. Longtin; John R. Hummel; SPARTA INC LEXINGTON MA
|
| Under the direction of the Remote Sensing Branch of the Naval Research Laboratory (NRL), SPARTA, Inc. calculated upwelling ground-to-space radiances and kernel functions for model atmospheres under different viewing and atmospheric conditions. These sensitivity calculations were then used by NRL personnel in a feasibility study which examined the possibility of obtaining information about atmospheric constituents from a remote sensing platform as it looks through the atmosphere at a source of ... |
|
| Atomic Layer Epitaxy of Group IV Materials: Surface Processes, Thin Films, Devices and their Characterization |
JUN 94 |
45 pages |
| Authors:
Robert F. Davis; NORTH CAROLINA STATE UNIV AT RALEIGH DEPT OF MATERIALS SCIENCE AND ENGINEERING
|
| The viability of Si2Cl6, C2H2 and C2H4 as precursors for chemically self-limiting ALE of SiC has been investigated via XPS and LEED. Si2Cl6 readily adsorbs in a self-limiting manner on a Si(100) surface; however, neither hydrocarbon will adsorb or react with a Cl-terminated Si surface to 475 deg C. Conversely, partial chlorination of Si(100) saturated with C2H2 and C2H4 does occur and implies that Si2Cl6 will adsorb/react with a hydrocarbon ... |
|
| Integrated Photonics Research (1993) |
JUN 94 |
540 pages |
| Authors:
Yaron Silberberg; OPTICAL SOCIETY OF AMERICA WASHINGTON DC
|
| Summaries of papers presented at the Integrated Photonics Research Topical Meeting, March 22-24, 1993, in Palm Springs, California. Sessions include Novel Material and Devices, Time Domain Methods, Photonic Circuits and Lightwave Reception, III-V Semiconductor Switches and Modulators, Wavelength Selective Components, Optical Waveguide Simulators, Optical Switching, Silica on Silicon, Nonlinear Wave Propagation, Semiconductor Lasers, LiNbO3 and LiTaO3 Devices, Beam Propagation Methods, Photonic Integrated Circuits and Applications, Semiconductor Device Modeling, Waveguide Frequency ... |
|
| Polyurethane Self-Priming Topcoats. |
03 MAY 1994 |
|
| Authors:
Charles R. Hegedus; Donald J. Hirst; Anthony T. Eng; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A corrosion-resistant coating which can be applied directly to a surface as a self-priming topcoat comprising a polyurethane resin binder and a combination of pigments consisting essentially of a molybdate-modified zinc phosphate, zinc salts of benzoic acids, and an alkaline earth metal phosphate such as zinc-barium phosphate. In addition, the coating contains up to about 35 parts by weight of a titanium dioxide pigment, up to about 3.0 parts by ... |
|
| Effect of Hyperbaric Carbon Dioxide on Spores and Vegetative Cells of Bacillus stearothermophilus |
MAY 94 |
36 pages |
| Authors:
Chester T. Roskey; Anthony Sikes; ARMY NATICK RESEARCH DEVELOPMENT AND ENGINEERING CENTER MA
|
| Spore suspensions in water, 0.05M pH 7 phosphate buffer, 0.05M pH 4.5 and 0.05M pH 4.0 acetate buffer, and antibiotic assay media supplement broth (AAMS) were subjected to 50 psi to 1100 psi carbon dioxide at various temperatures in Parr bombs for up to 96 hours. Spores were resistant to high pressure carbon dioxide treatment at each pH and at both high and low temperatures. Spore suspensions that were first ... |
|
| Controlling Combustion-Source Emissions at Air Force Sites with a New Filter Concept. Phase 1 |
APR 94 |
56 pages |
| Authors:
Sidney G. Nelson; David A. Van Stone; Brian W. Nelson; Kenneth A. Peterson; SORBENT TECHNOLOGIES TWINSBURG OH
|
| The U.S. Air Force employs many combustion sources at its facilities, including boilers, diesel engines, turbines, incinerators, and motor vehicles, that produce exhaust gases containing undesirable components. Components of concern include nitrogen oxides (NOx), carbon monoxide (CO), PM-10 particulate matter, sulfur dioxide (SO,), and a long list of compounds considered toxic by nature. Recently, Sorbent Technologies Corporation (Sorbtech) developed a new filter technology for the Air Force to control emissions ... |
|
| Polyurethane Self-Priming Topcoats. |
01 MAR 1994 |
|
| Authors:
Charles R. Hegedus; Donald J. Hirst; Anthony T. Eng; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A corrosion-resistant coating which can be applied directly to a surface as a self-priming topcoat comprising a polyurethane resin binder and a combination of pigments consisting essentially of a molybdate-modified zinc phosphate, zinc salts of benzoic acids, and an alkaline earth metal phosphate such as zinc-barium phosphate. In addition, the coating contains up to about 35 parts by weight of a titanium dioxide pigment, up to about 3.0 parts by ... |
|
| Interface Engineering in Oxide Fiber/Oxide Matrix Composites |
28 FEB 94 |
33 pages |
| Authors:
K. K. Chawla; NEW MEXICO INST OF MINING AND TECHNOLOGY SOCORRO DEPT OF METALLURGICAL AND MA TERIALS ENGINEERING
|
| We have shown in earlier work that significant improvements in the mechanical properties of the alumina + 15 w/o zirconia (PRD-166) fiber/ borosilicate glass matrix and mullite (Nextel 480 and 550) fiber/mullite matrix composites could be achieved using interface engineering approach. This approach involves a control of the microstructure, roughness of the interface, and the thermal expansion mismatch between the fiber and matrix in order to improve the strength and ... |
|
| Complex Impedance, DSC and Lithium-7 NMR Studies of Poly(propylene oxide) Complexed with LiN(SO2CF3)2 and with LiAsF6 |
1994 |
12 pages |
| Authors:
S. D. Brown; S. G. Greenbaum; M. G. McLin; M. C. Wintersgill; J. J. Fontanella; HUNTER COLL NEW YORK DEPT OF PHYSICS AND ASTRONOMY
|
| Complex impedance/electrical conductivity, differential scanning calorimetry and 7Li nuclear magnetic resonance measurements on poly (propylene oxide) complexed with two lithium salts LiN(SO2CF3)2 and LiAsF6, with compositions of eight ether oxygens per lithium, are reported. Ionic mobility, as probed by NMR linewidth and spin-lattice relaxation measurements, is strongly coupled to polymer segmental motion above Tg. The electrical conductivity for PPO8LiAsF6 is about an order of magnitude smaller than for PPO8LiN(SO2CF3)2. This ... |
|
| Electron-Beam Controlled Semiconductor Switches |
02 NOV 93 |
113 pages |
| Authors:
Karl Schoenbach; OLD DOMINION UNIV NORFOLK VA DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| The final report consists of an overview of the experimental and modeling studies on electron-beam controlled semiconductor switches and, for more details, reprints of paper published under this contract. Also included in the final report are results of those studies which have not yet been published in the open literature. Electron-beams, Solid state switches, Silicon dioxide |
|
| Investigation of the Sensitivity, Selectivity, and Reversibility of the Chemically-Sensitive Field-Effect Transistor (CHEMFET) to Detect Nitrogen Dioxide, Dimethyl Methylphosphonate, and Boron Trifluoride |
SEP 93 |
261 pages |
| Authors:
Neal T. Hauschild; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
|
| This study investigated the sensitivity, selectivity, and reversibility of a chemically-sensitive field-effect transistor (CHEMFET) gas microsensor. Various physical operating parameters were tested to determine which produced the most significant sensitivity, selectivity, and reversibility which were computed from response changes generated from electrical conductivity modulations when exposed to challenge gases. The variable operating parameters included: thinfilm material, film thickness, challenge gas specie, challenge gas concentration, and operating temperature. Copper phthalocyanine and ... |
|
| Photodissociation Studies of Polyatomic Free Radicals |
AUG 93 |
152 pages |
| Authors:
Brad R. Weiner; PUERTO RICO UNIV RIO PIEDRAS DEPT OF CHEMISTRY
|
| An experimental program in gas phase polyatomic photochemistry and photophysics has been extablished in the Department of Chemistry at the University of Puerto Rico. Real time dynamics of sulfur monoxide photoelimination reactions have been studied by laser induced fluorescence spectroscopy of the nascent SO fragment on the B3 sigma (-) -X3 sigma (-) transition in the region of 237-295 nm. The group of molecules under investigation are Sulfur dioxide (SO2), ... |
|
| Preparation of Homogeneous Aluminosilicate Gels by Sol/Gel Techniques |
12 JUL 93 |
9 pages |
| Authors:
M. Reese; J. Sanchez; A. V. McCormick; MINNESOTA UNIV MINNEAPOLIS DEPT OF CHEMICAL ENGINEERING AND MATERIALS SCIENCE
|
| The factors affecting the production of homogeneous aluminosilicate gels from alkoxide precursors were investigated. Aluminosilicate gels were made in acidic conditions with a prepolymerization of the silicate precursors followed by the addition of the alumina precursor. Confirming earlier studies, we found that the gel homogeneity is increased when the rate of gelation decreases. The reduction of the water content and/or the aluminum precursor, and more surprisingly the increase of the ... |
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| Toxicity and Fate Comparison between Several Brass and Titanium Dioxide Powders |
JUL 93 |
13 pages |
| Authors:
Mark V. Haley; Carl W. Kurnas; EDGEWOOD RESEARCH DEVELOPMENT AND ENGINEERING CENTER ABERDEEN PROVING GROUND MD
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| Brass flakes (MD Both Industries, Ashland, MA), SF-150 Rich Gold, and four brands of titanium dioxide were tested to determine their toxicities to Daphnia magna (water flea), Ankistrodesmus falcatus (green algae), and Selenastrum capricornutum (green algae). The toxicity of the brass materials were ranked high, having EC50S below I mg/L for daphnia and algae. The fate of the brass materials were determined in fresh water of varying hardness, in synthetic ... |
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| BA-5598 Lithium Sulfur Dioxide and the BA-4386 Magnesium Batteries |
18 JUN 1993 |
68 pages |
| Authors:
INSPECTOR GENERAL DEPT OF DEFENSE ARLINGTON VA
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| The Army Communications-Electronics Command (CECOM) is responsible for the supply management of batteries used in communications-electronics equipment for all Services. An inquiry was received from the Chairman of the House Armed Services Committee questioning the quantity of BA-5598 lithium batteries being procured by CECOM. |
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| Atomic Layer Epitaxy Group IV Materials: Surface Processes, Thin Films, Devices and Their Characterization |
JUN 93 |
43 pages |
| Authors:
Robert F. Davis; Salah Bedair; Nadia El-Masry; Jeffrey T. Glass; NORTH CAROLINA STATE UNIV AT RALEIGH
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| The maximum temperature at which self-terminating monolayers of Si can be formed on Si(100) from Si2H6 has been determined to be 570 deg C. As such, the chemical reactivity Of C2H4 has been determined to be insufficient at this temperature, and acetylene has been selected as the successor C precursor due to its superior reactivity and chemisorption properties. A cryogenic purifier for removing acetone has been commissioned. Trenched Si(100) wafers ... |
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| Electromigration Characteristics of Copper Interconnects |
MAY 1993 |
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| Authors:
Jiang Tao; Nathan W. Cheung; Chenming Hu; CALIFORNIA UNIV BERKELEY DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE
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| The electromigration characteristics of electroless plated copper interconnects have been investigated under dc and time-varying current stressing. A novel scheme was reported for selective electroless Cu plating by using 150-A Co as the seeding layer. The Cu dc and pulse-dc lifetimes are found to be one and two orders of magnitude longer than that of Al-4%Cu/ TiW and Al- 2%Si interconnects at 275 deg C, and the extracted Cu lifetime ... |
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| Polyurethane Self-Priming Topcoats. |
16 APR 1993 |
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| Authors:
Charles R. Hedgedus; Donald J. Hirst; Anthony T. Eng; DEPARTMENT OF THE NAVY WASHINGTON DC
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| A corrosion-resistant coating which can be applied directly to a surface as a self-priming topcoat comprising a polyurethane resin binder and a combination of pigments consisting essentially of an alkaline earth metal metaborate, zinc salts of benzoic acids, and an alkaline earth metal phosphate such as zinc-barium phosphate. In addition, the coating contains from 5 - 40 parts by weight of a titanium dioxide pigment, up to about 3.0 parts ... |
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