Piezoelectric body
US6531070B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 21, 2000 |
| Grant date | Mar 11, 2003 |
| Priority date | — |
| Expiry date | Aug 21, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/94
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A piezoelectric body is provided, including (Bi½Na½)TiO3 as a main component which is obtained by forming and sintering powders. A heterogeneous phase, other than (Bi½Na½)TiO3 system perovskite phase, in the powders has a peak ratio relative to the strongest peak of the perovskite phase of 5% or lower as determined by powder X-ray diffraction. As a result, the frequency of the dielectric breakdown in a sintered piezoelectric body during polarization can be dramatically reduced to 0.1 to 2% of that experienced in prior art compositions The manufacturing yield can be increased, manufacturing costs can be reduced, and the overall reliability of products manufactured therefrom can be improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.