Preparation of ferroelectric relaxor Pb(Zn 1/2 Nb2/3)O3-Pb(Mg1/3Nb2/3)O3 -PbTiO3 by two-step calcination method

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机构：
[1] Orita, Masahiro
[2] Satoh, Hironobu
[3] Aizawa, Kazuhiro
[4] Ametani, Kohei
来源：
Orita, Masahiro | 1600年 / 31期
关键词：
Calcination - Ceramic materials - Dielectric properties - Ferroelectric materials - Powder metallurgy;
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摘要：
Powder materials having the composition Pb0.88Ba0.12(Zn1/3Nb2/3)0.30 (Mg1/3Nb2/3)0.50 Ti0.20O3 were prepared by a two-step calcination method. All the constituent oxides, except for PbO, were precalcined, and then the resulting mixtures were postcalcined with PbO to obtain powders having the desired composition. A series of experimental studies of the powder and the ceramic showed that samples fabricated by the present method had better properties in terms of perovskite phase purity, sinterability, breakdown voltage and dielectric constant, compared to those prepared by the conventional method using one-step calcination.
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