Piezoelectric/electrostrictive ceramic composition manufacturing method
US8119023B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2009 |
| Grant date | Feb 21, 2012 |
| Priority date | — |
| Expiry date | May 29, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/074
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A (Li, Na, K)(Nb, Ta)O3-based piezoelectric/electrostrictive ceramic composition having a large field-induced distortion during application of a high electric field is provided. After synthesizing a perovskite oxide containing Li (lithium), Na (sodium) and K (potassium) as A-site elements and containing at least Nb (niobium) out of the Nb and Ta (tantalum) as B-site elements, a ratio of total number of atoms of the A-site elements to total number of atoms of the B-site elements being higher than 1, a Bi (bismuth) compound is added to the perovskite oxide and the perovskite oxide is reacted with the Bi compound. An addition amount of the Bi compound with respect to 100 molar parts of the perovskite oxide is preferably equal to or greater than 0.01 molar part and equal to or smaller than 0.1 molar part in terms of Bi atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.