Accession Number:

AD0294804

Title:

INORGANIC DIELECTRICS RESEARCH

Descriptive Note:

Corporate Author:

NEW JERSEY CERAMIC RESEARCH STATION NEW BRUNSWICK

Personal Author(s):

Report Date:

1962-11-01

Pagination or Media Count:

1.0

Abstract:

Pulverized BaTiO3 glass specimens were fired in an O atmosphere which resulted in raising the bulk density to 5.64 gcc. An impurity level study was conducted to determine the contamination added by processing. No more than 0.1 impurities was added to the 99.8 pure BaTiO3. A study of the electrical hysteresis vs. temperature, and structure vs. temperature, is presented proving that the structural Curie temperature is at 120 C while the dielectric Curie temperature is at approximately 150 C. Deterioration of the electrical properties of hot pressed BN was studied. A furnace capable of being fired up to 1900 C using H or an inert atmosphere was constructed. It utilizes induction heating. Alumina specimens fired to date reached 98 of true density, and theoretical density should be produced when higher temperature firings are accomplished. Several procedures for preparing lanthanum alumino silicate dielectrics are discussed. A procedure was devised by which the compositions are prereacted, reduced to a fabricating particle size, specimens prepared and fired to maturity. A second firing is being utilized to develop low loss characteristics. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE