发明名称 |
CERAMIC COMPOSITION HAVING HIGH DIELECTRIC CONSTANT |
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(Mg1/3 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, 0.334<=b<=1.0, 0.65<=x<=0.97 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. |
申请公布号 |
JPH029756(A) |
申请公布日期 |
1990.01.12 |
申请号 |
JP19880158437 |
申请日期 |
1988.06.27 |
申请人 |
TDK CORP |
发明人 |
SAWAMURA KENTARO;UCHIKOBA FUMIO |
分类号 |
C04B35/46;C04B35/00;C04B35/495;H01B3/12 |
主分类号 |
C04B35/46 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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