水熱合成粉体を用いたPb(Zr_<0.53>Ti_<0.47>)O_3セラミックスの焼結及び電気的特性に及ぼすNb_2O_5添加効果 : 合成・キャラクタリーゼーション

概要

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Nb_2O_5 additive effects for sintering and electrical properties were investigated in PZT ceramics using the hydrothermally produced powder. Nb_2O_5 addition in PZT ceramics were suppressive effect for grain growth in sintering properties. On the other hand, Nb_2O_5 addition was contributed to improve the dielectric loss in electrical properties. As the grain size was decreased, the relative permittivity (ε_s) at Curie point (T_c) was decreased, theε_s curve became suppressive. The values ofε_s at T_c were 80000 (Nb_2O_5 = 0.005 mol) and 40000 (Nb_2O_5 = 0.01 mol) , respectively and these exhibited the larger values compared to those made by conventional powder. The electromechanical coupling factors, K_p, were high value above 0. 60 at the wide sintering temperature range by Nb_2O_5 addition above 0.005 mol.
社団法人日本セラミックス協会の論文
1990-08-01