INORGANIC DIELECTRICS RESEARCH.
Progress rept. no. 6, 1 Feb-1 May 63.
NEW JERSEY CERAMIC RESEARCH STATION NEWBRUNSWICK
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A summary of status of the 100 devitrified barium titanate type compositions is presented. Alumina bodies were fired in four atmospheres hydrogen, oxygen, argon, and vacuum, using a two fire procedure, and a differen tmosphere for each fire. Fired specimens were tested for speci fic gravity, moisture absorption, total porosity, and translucency. Microscopic examinations were used to determine grain and pore size. Specimens fired in vacuum exhibited the best results, while poorest properties were obtained with argon. A number of experimental attempts to hot coextrude lead zirconate titanate and barium titanate in steel co-extrusion cans are described. An attempt to slowly hot extrude lead zirconate titanate at low pressure is also discussed. In order to aid in the development of materials with very low losses in the microwave frequency range, a study is initiated of single crystals, ceramics, and glasses for which extensive electrical data have been obtained. Author