Title:
圧電磁器組成物およびそれを用いた圧電セラミック素子
Document Type and Number:
Japanese Patent JP4479089
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a piezoelectric ceramic composition useful as a material for piezoelectric ceramic elements such as piezoelectric filter, piezoelectric vibrator and piezoelectric ceramic oscillator exhibiting (>=20%) electromechanical coupling factor kt and (<=45) temperature-changing rate frTC of resonance frequency which are practically usable by improving an electromechanical cou pling factor kt and a temperature-changing rate frTC of resonance frequency at -20 deg.C to 80 deg.C of piezoelectric ceramic composition consisting essentially of SrBi4Ti4O15 and a piezoelectric ceramic element using the above ceramic composition. SOLUTION: This piezoelectric ceramic composition comprises a main component represented by the general formula SrBi4Ti4O15. In the composition, at least one king of element of Sc and Y is contained in an amount of <=0.1 mol and >0 based on 1 mol Bi in the main component represented by the above general formula.
More Like This:
Inventors:
Takuya Sawada
Masahiko Kimura
Yo Ando
Koichi Hayashi
Masahiko Kimura
Yo Ando
Koichi Hayashi
Application Number:
JP2000326638A
Publication Date:
June 09, 2010
Filing Date:
October 26, 2000
Export Citation:
Assignee:
MURATA MANUFACTURING CO.,LTD.
International Classes:
C04B35/46; H01L41/09; H01L41/187
Domestic Patent References:
| JP2001192267A | ||||
| JP2001002468A |
Other References:
Masakazu Hirose et al.,Piezoelectric Properties of SrBi4Ti4O15-Based Ceramics,Japanese Journal of Applied Physics,1999年 9月,Vol.38,pp.5561-5563
Attorney, Agent or Firm:
Masahiro Okada