Piezoelectric ceramic composition
US6083415A · kind A · utility
17Cited by
1References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 18, 1999 |
| Grant date | Jul 4, 2000 |
| Priority date | — |
| Expiry date | Feb 18, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/8542
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention provides a piezoelectric ceramic composition which predominantly comprises a composition represented by the following formula : EQU (1-n)(K.sub.1-x-y Na.sub.x Li.sub.y) .sub.m (Nb.sub.1-z Ta.sub.z)O.sub.3 -nM1M2M3O.sub.3 wherein M1 represents a trivalent metal element such as Bi; M2 represents a monovalent metal element such as K, Na or Li; M3 represents a tetravalent metal element such as Ti, Zr, Sn or Hf; and x, y, z, m, and n satisfy the following conditions: 0.9.ltoreq.x; y.ltoreq.0.3; x+y<0.75; 0.ltoreq.z.ltoreq.0.3; 0.98.ltoreq.m.ltoreq.1.0; and 0<n<0.1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.