| 摘要 |
PURPOSE: To obtain a piezoelectric porcelain compsn. maintaining high piezoelectric property in a compsn. region close to MPB and having superior thermal stability. CONSTITUTION: In a piezoelectric porcelain compsn. consisting of perovskite type oxides each represented by the general formula ABO3 and having XPb(Mn1/3 Nb2/3 )O3 -YPbZrO3 -ZPbTiO3 as the basic compsn., X, Y and Z are regulated to 0.01<=X<=0.20, 0.30<=Y<=0.60 and 0.20<=Z<=0.69 (X+Y+Z=1.0), and Co and Mg are added as additives by 0.1-2.0wt.% (expressed in terms of CoO) and 0.1-0.5wt.% (expressed in terms of MgO), respectively. |
