This report documents a design study aimed at producing broader bandwidth, high- power transducers for Navy applications in littoral waters. The top-to-bottom study included both ceramic driver processing and the transducer design itself. Active Signal Technologies and Alfred University investigated a novel processing method involving coating the ceramic particles prior to densification and it substantially increased the room-temperature electrically- induced strains available from the ceramic without significantly increasing dielectric loss. ...
LiZn ferrites were investigated to control the resultant microstructure or to obtain nanoscale powders at a low temperature. Two nonconventional chemical methods are introduced. The sol-gel coating procedure was used to uniformly distribute additives like SiO2 and Bi2O3. These oxides improved the densification of the LiZn ferrites at low temperatures via a liquid phase sintering. Nanocrystalline LiZn ferrites were obtained at a low temperature of 400 deg C via the ...
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