RESEARCH AND DEVELOPMENT ON HIGH TEMPERATURE FERROELECTRIC MATERIALS
Abstract
An investigation was made to develop a ferroelectric material which possesses the following characteristics in the temperature range from -55 to 500 C: P sub s greater than 4 mu Coulomb/sq cm, d sub 33 greater than 10 to the -10th power Coulomb/Newton, rho greater than 10 to the 7th power Omega-cm and epsilon less than 1500. The work consisted of (1) exploration of new ferroelectric compounds with high Curie temperatures, and (2) optimization of the piezoelectric properties of the more promising ferroelectric materials. Among the new ferroelectrics investigated, the layer-type bismuth compounds, with the general formula Bi2O2(2+)Me sub m-1 R sub m O sub 3m+1(2-) were revealed to constitute the largest family of high temperature ferroelectrics. The development work on the known ferroelectrics resulted in a considerable improvement in the piezoelectric properties of PbTiO3-base materials. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 11, 1961
- Accession Number
- AD0262458
Entities
People
- E.c. Subbarao
- T.y. Tien
Organizations
- Westinghouse Electric Corporation