Title:
圧電磁器
Document Type and Number:
Japanese Patent JP4569062
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide piezoelectric porcelain which can enhance a curie temperature and can widen a service temperature range while maintaining a high coefficient of electromechanical coupling. SOLUTION: This piezoelectric composition contains (1-n)Bax TiO3 +n(K0.5 Bi0.5 )x TiO3 . The porcelain contains MnO as a sub-component. These components may be or not may be in complete solution. As a result, the Curie temperature can be made higher and the service temperature range wider while the high coefficient of electromechanical coupling is maintained. N is preferably a value within a range satisfying 0.10<=n<=0.30. The content of the MnO is preferably greater than 0.031 mass% of the essential component and below 0.12 mass%.
Inventors:
Tadashi Takenaka
Masakazu Hirose
Masakazu Hirose
Application Number:
JP2001271807A
Publication Date:
October 27, 2010
Filing Date:
September 07, 2001
Export Citation:
Assignee:
tdk Corporation
International Classes:
C04B35/46; H01L41/187
Domestic Patent References:
| JP2001151566A | ||||
| JP62202576A | ||||
| JP11171643A |
Attorney, Agent or Firm:
Yasushi Santanzaki
Yoichiro Fujishima
Yoichiro Fujishima