| 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 or Ti in compound perovskite represented by a formula Pb(Ni1/3 Nb2/3)O3-PbTiO3 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, 0.005<=b<=0.4, 0.4<=x<=0.8 and x+y=1). It is supposed that the conversion of this compsn. into an n-type semiconductor is inhibited because divalent Mg atoms are substd. for part of pentavalent Nb atoms or tetravalent Ti atoms in the B site component and excess electrons generated by the release of oxygen during calcining are captured by the difference in valence. |
