Piezoelectric ceramic material and piezoelectric ceramic sintered body produced by the same

Application Number: 00108875
Application Date: 2000.05.19
Publication Number: 1274700
Publication Date: 2000.11.29
Priority Information: 1999/5/20 JP 139780/99
International: C04B35/491;C04B35/64;H01L41/187
Applicant(s) Name: Murata Manufacturing Co., Ltd.
Inventor(s) Name: Yoshizaawa Isami;Horikawa Katsuhiro
Patent Agency Code: 31100
Patent Agent: sha yongsheng
Abstract A piezoelectric ceramic material able to form a piezoelectric ceramic sintered body having such characteristics as a small electromechanical coupling coefficient, small resonant resistance and small temperature dependency of the resonant frequency that is required for designing a narrow-band filter is represented by principal component of the general formula of (PbaSrb)(ZrcTidMneNbf)O3 and having a composition satisfying the following relations of 0.93<=a<=1.01, 0.01<=b<=0.04, 0.37<=c<=0.47, 0.48<=d<=0.58, 0.0105<=e<=0.06, 0.02<=f<=0.06 and 1.05<=2e/f<=2, and comprising sub-components of about 0.003% to 0.1% by weight of each of SiO2 and Al2O3 relative to the principal component.