| 摘要 |
PURPOSE:To obtain the title compsn. having high epsilonr value, high Q value and low taur value and effective in reducing the size of dielectric porcelain for microwaves by specifying a compsn. consisting of BaO, TiO2, Nd2O3, Gd2O3 and Bi2O3. CONSTITUTION:A dielectric porcelain compsn. represented by formula I (where by molar ratio, 0.05<a<0.25, 0.60<b<0.80, 0.05<c<0.25, a+b+c=1, 0<x<=0.20 and 0<y<=0.25) is provided. The compsn. is a BaO-TiO2-(Nd-Gd-Bi)2O3 compsn. and has high Q value, high epsilonr value and low taur value within a specified compsn. range obtd. by substituting Gd2O3 and Bi2O3 for part of Nd2O3. The low taur not attained only by substituting Bi2O3 for part of Nd2O3 is attained by further adding Gd2O3. |
