| 摘要 |
PURPOSE:To enable the maintenance of high resistance even by calcining in an atmosphere under a low partial pressure of oxygen by substituting Mg for part of Nb, W or Ti in compound perovskite represented by a formula Pb(Mg1/3 Nb2/3)O3-PbTiO3-Pb(Zn1/2W1/2)O3 so as to obtain a specified compsn. CONSTITUTION:This ceramic compsn. having a high dielectric constant is represented by the general formula (where 0.95<=a<=1.2, 0.334<=b<=1.0 and x+y+z=1) and consists of components within a tetragonal range having compsn. points A-D as vertexes corresponding to variables a, b in the triangular coordinates having Pba(MgbNb2/3)Oa+b+5/3, PbaTiOa+2 and Pba(Zn1/2W1/2)Oa+2 as vertexes. The points A-D (x, y, z) are A (0.960, 0.039, 0.001), B (0.600, 0.399, 0.001), C (0.010, 0.710, 0.280) and D (0.010, 0.100, 0.890). |
