| 摘要 |
PURPOSE:To provide a porcelain composition having a high dielectric constant, a low dielectric loss, a large dielectric voltage, large insulating resistance, and a small diameter of a crystalline particle by using a compound having a specific composition including Ba, Mg, Ti, Zr, Sn and rare earth oxide. CONSTITUTION:A composition expressed by Formula (x)>>(BaO)(1-m).(MgO)m].(y)>>(TiO2)(1-n-s)(ZrO2)n(SnO2)s].(z)RO3/2 is used, wherein R represents one kind or more of La, Pr, Nd and Sm; and (m) ranges from 0.01 to 0.50; (n), from 0.001 to 0.100; and (s), from 0.01 to 0.10. (x)+(y)+(z)=1.0.3-5.0 parts by weight of niobium in a form of Nb2O5 are incorporated into 100 parts by weight of a main component within a range of mol ratios surrounded by a point (a) of (x)=0.15, (y)=0.50, and (z)=0.35, a point (b) of (x)=0.16, (y)=0.61, and (z)=0.23, a point (c) of (x)=0.10, (y)=0.67, and (z)=0.23, a point (d) of (x)=0.09, (y)=0.60, and (z)=0.31, a point (e) of (x)=0.02, (y)=0.58, and (z)=0.40, and a point (f) of (x)=0.02, (y)=0.52, and (z)=0.46. |
