Title:
圧電体セラミックス
Document Type and Number:
Japanese Patent JP4510966
Kind Code:
B2
Abstract:
A lead-free piezoelectric ceramic material is provided having a high piezoelectric strain constant (d33) and exhibiting excellent heat resistance. The material is particularly suitable for producing knock sensor elements, i.e., sensor elements for sensing engine knock. The piezoelectric ceramic material contains three components, BNT (bismuth sodium titanate, (Bi0.5Na0.5)TiO3), BT (barium titanate, BaTiO3) and BKT (bismuth potassium titanate, (Bi0.5K0.5)TiO3), and preferably has a tetragonal perovskite-type crystal structure.
Inventors:
Takase Masaki
Kazushige Obayashi
Kazushige Obayashi
Application Number:
JP32953399A
Publication Date:
July 28, 2010
Filing Date:
November 19, 1999
Export Citation:
Assignee:
Nippon Special Ceramics Co., Ltd.
International Classes:
C04B35/46; H01L41/18; C04B35/475; H01L41/187
Domestic Patent References:
| JP11171643A | ||||
| JP11060333A | ||||
| JP11180769A |
Other References:
Takenaka T.,(Bi1/2Na1/2)TiO3-BaTiO3 System for Lead-Free Piezoelectric Ceramics,Japanese Journal of Applied Physics,1991年 9月,Vol.30,No.9B,P.2236-2239
Chiang Y.M.,Lead-free high-strain single-crystal piezoelectrics in the alkaline-bismuth-titanate perovskite family,Applied Physics Letters,1998年12月21日,Vol.73,No.25,P.3683-3685
Chiang Y.M.,Lead-free high-strain single-crystal piezoelectrics in the alkaline-bismuth-titanate perovskite family,Applied Physics Letters,1998年12月21日,Vol.73,No.25,P.3683-3685
Attorney, Agent or Firm:
Naoki Fukumura