Compositions for high power piezoelectric ceramics
US7547401B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 7, 2006 |
| Grant date | Jun 16, 2009 |
| Priority date | — |
| Expiry date | May 22, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/786
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Piezoelectric compositions of the formula Pb(1-z)Mz(Mg1/3Nb2/3)x(ZryTi1-y)1-xO3 where M can be either Sr or Ba or both, x is between about 0.35 and about 0.40, y is between about 0.36 and about 0.42, and z is between about 0.04 and about 0.08. The piezoelectric ceramic is provided as a composite perovskite structure. Additional materials or dopants can be added to the piezoelectric ceramic of the present invention. Example of dopants that can be added to the piezoelectric ceramic include, but are not limited to: MnO2, Ni2O3, TeO3, TeO2, MoO3, Nb2O5, Ta2O5, CoCO3, and Y2O3. The piezoelectric ceramics of the present invention can be used to fabricate piezoelectric elements for a wide variety of devices that can be fabricated to exhibit high power applications including miniaturized displacement elements, buzzers, transducers, ultrasonic sensors and ultrasonic generators, and the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.