Patent · US Expired

Piezoelectric ceramic compact and piezoelectric ceramic device using the same

US6558567B2 · kind B2 · utility

2Cited by

5References

20Claims

0Family size

Assignee

MURATA MANUFACTURING CO., LTD. · JP

Inventors

Masahiko Kimura · Yokohama, JP
Takuya Sawada · Hachioji, JP
Akira Ando · Rifu, JP

Key dates

Filing date	May 18, 2001
Grant date	May 6, 2003
Priority date	—
Expiry date	Jun 28, 2021

Classification

Technology area (CPC H)Electricity
CPC primaryH10N30/853
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

Provided is a piezoelectric ceramic compact useful as a material for a piezoelectric ceramic compact device or the like, having SrBi4Ti4O15 as a main component, containing no or a small amount of lead or lead compound, and exhibiting a Qmax improved to a level permitting practical use application. The piezoelectric ceramic compact includes a bismuth layer compound as a main component composed of Sr, Bi, Ti and oxygen, and when the molar ratio of Sr, Bi and Ti of the bismuth layer compound as the main component is a:b:c, the relations of 0.13&lE;a/c<0.25 and 3.5&lE;(2a+3b)/c&lE;3.75 are satisfied.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.