| 摘要 |
PURPOSE:To obtain a dielectric porcelain compsn. having a small temp. coefft. of dielectric constant and small dielectric loss in a high frequency range, especially suitable for a capacitor for temp. compensation by substituting Sr and Ca for a part of Pb in zinc-lead niobate and further substituting Ti or Zr for a part of Zn-Nb. CONSTITUTION:A ceramic essentially comprising lead niobate expressed by the formula (wherein M is Ti or Zr, 0.2<=x<=0.4, 0.4<=y<=0.65, 0.7<x+y<=0.9, 0<z<0.3, and preferably 0.2<=x<=0.3, 0.4<=y<=0.55, 0.72<=x+y<=0.78) is used as the dielectric porcelain compsn. having excellent temp. characteristics. By substituting Ba for 50 atomic % of Ca, the relative dielectric constant of the ceramic is increased. |
