Method for manufacturing piezoelectric ceramic composition, piezoelectric resonator, piezoelectric transformer and piezoelectric actuator, and piezoelectric laminated sintered body
US6440324B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 2000 |
| Grant date | Aug 27, 2002 |
| Priority date | — |
| Expiry date | Sep 29, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/871
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A piezoelectric ceramic composition capable of obtaining a piezoelectric member that can provide a sufficient sintering density even by firing at a low temperature besides only allowing small amount of Pb to be evaporated by firing to reduce deterioration of electrical characteristics, wherein the piezoelectric member comprises a perovskite structure oxide of the piezoelectric ceramic composition containing Pb, Ti, Zr, Ma (Ma represents at least one of Cr, Mn, Fe and Co) and Md (Md represents at least one of Nb, Sb, Ta and W), and wherein a represents the total content (in mole) of Ma, and b, c, d and e (in mole) represent the contents of Sb, Nb, Ta and W, respectively, and 0.50<a/(b+c+d+2e).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.