Piezoelectric ceramic composition and piezoelectric ceramic element using the same
US6391223B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 2000 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | May 24, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/853
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A piezoelectric ceramic composition that can yield a piezoelectric ceramic capable of being fired at a temperature as low as 1100° C. or below and exhibiting an electromechanical coupling coefficient sufficient for providing a piezoelectric ceramic element for practical use, and a piezoelectric ceramic element using the same, wherein the piezoelectric ceramic composition comprises a principal component represented by a general formula of CaBi4(Ti1−ySiy)4O15 with y within the range of 0<y≦0.5, possibly containing other divalent or trivalent elements, and wherein a piezoelectric ceramic element, in which electrodes are formed on both principal faces of the piezoelectric ceramic while forming an inner electrode within the piezoelectric ceramic, can be formed using the piezoelectric ceramic composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.