Title:
【発明の名称】圧電セラミックス
Document Type and Number:
Japanese Patent JP3020493
Kind Code:
B1
Abstract:
PROBLEM TO BE SOLVED: To obtain ceramics which does not contain lead, has a high Curie point and has an excellent piezoelectric characteristic, more particularly large Qmax by forming the ceramics of a bismuth layer-like compound containing Sr, Bi, Ti and Ln(Lanthanoids), incorporating an SrBiTiO type crystal therein and specifying an atomic ratio and cobalt oxide content. SOLUTION: The atomic ratio is 0=450$ deg.C and Qmax is 39.50 to 54.40. The process for production consists in wet mixing compounded raw material, calcining the mixture at 800 to 1000 deg.C, slurrying the resulted calcined matter and subjecting the calcined matter to wet process pulverizing with a ball mill, etc. The powder of the calcined matter is dried and is press formed, by which the molding is obtained. The molding is then fired for 1 to 5 hours at 1200 to 1350 deg.C.
Inventors:
Masakazu Hirose
Taiji Miyauchi
Taiji Miyauchi
Application Number:
JP7695099A
Publication Date:
March 15, 2000
Filing Date:
March 19, 1999
Export Citation:
Assignee:
TDK Co., Ltd.
International Classes:
H01L41/187; C04B35/46; (IPC1-7): C04B35/46; H01L41/187
Domestic Patent References:
| JP5034313A |
Other References:
【文献】DD,266346,A1(東ドイツ公報)
【文献】DD,258915,A1(東ドイツ公報)
【文献】DD,258915,A1(東ドイツ公報)
Attorney, Agent or Firm:
Youichi Ishii