| 摘要 |
PURPOSE:To provide the composition having a piezo-electrostriction constant and a Curie temperature both maintained at the substantially same high values as those of conventional compositions and simultaneously having an antifolding strength of >=80 MPa, the antifolding strength representing the strength of the composition. CONSTITUTION:The piezoelectric porcelain composition has a composition represented by formula: (Pb1-xSrx)(ZryTi1-y-zNbZ)O33 [0.08<=x<=0.14, 0.49<=y-0.5x<=0.51, 0.02<x<=0.06]. The diameters of crystal particles in the composition are reduced by increasing the Nb content in comparison with conventional compositions, and consequently the diameters of pores are minimized, thereby improving the strength of the composition. |
