Accession Number : AD0255979

Title :   RESEARCH AND DEVELOPMENT OF HIGH TEMPERATURE FERROELECTRIC MATERIALS

Corporate Author : WESTINGHOUSE ELECTRIC CORP PITTSBURGH PA

Personal Author(s) : SUBBARAO,E.C. ; TIEN,T.Y.

Report Date : 11 APR 1961

Pagination or Media Count : 1

Abstract : This report includes: A FAMILY OF FERROELECTRIC BISMUTH COMPOUNDS, by E. C. Subbarao. 26 Apr 61, 1v. incl. illus. tables (Scientific paper no. 406FD533-P3) The effects of small additions of various sintering aids (mineralizers) on the properties of PbTiO3 were evaluated. The majority of these additions produced strong PbTiO3 ceramics with densities greater than 90% of theoretical. CaF2 (in concentrations of 0.5 and 1.0 mol-%), improved the piezoelectric coefficient of PbTiO3 by a factor of 2 to 3. This large increase is believed to be related to the particular microstructure obtained for CaF2 bearing samples. Significant improvements in resistivity could lead to ferroelectric transducers for operation at temperatures beyond those of present commercially available materials. (Author)

Descriptors :   *BISMUTH COMPOUNDS, *DIELECTRICS, *FERROELECTRIC CRYSTALS, *FERROELECTRIC MATERIALS, *LEAD COMPOUNDS, *TITANIUM COMPOUNDS, CALCIUM COMPOUNDS, CERAMIC MATERIALS, CRYSTAL LATTICES, CRYSTAL STRUCTURE, DIELECTRIC PROPERTIES, FLUORIDES, NIOBATES, OXIDES, PHASE STUDIES, PIEZOELECTRIC CRYSTALS, TEMPERATURE, TITANATES, TRANSITION TEMPERATURE

Distribution Statement : APPROVED FOR PUBLIC RELEASE