| 摘要 |
PURPOSE:To obtain a piezoelectric porcelain compound large in electrostriction and mechanical displacement and small in hysteresis by a method wherein La2O3, Co2O3, and MnO are added as secondary compositions to a specific extent respectively to a chemical compound whose basic composition is specified. CONSTITUTION:0.01-0.3wt.% La2O3, 0.01-0.3wt.% Co2O3, and 0.005-0.15wt.% MnO are added to a basic composition represented by a formula, Pb[Ni1/3Nb2/3)A (Sb1/2Nb1/2)BZrCTiD]O3, to be contained. In the formula concerned, an equation, A+B+C+D=1, is satisfied, and inequalities, 0.300<=A<=0.550, 0.002<=B<=0.050, 0.120<=C<=0.290, and 0.280<=D<=0.408, are satisfied. By this setup, a piezoelectric ceramic composition large in both electrostriction and mechanical displacement and small in voltage-displacement hysteresis can be obtained. |
