Abnormal Grain Growth of Pb(Mg1/3Nb2/3)O3-35 mol% PbTiO3 Ceramics Induced by the Penetration Twin期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Abnormal Grain Growth of Pb(Mg_1/3Nb_2/3)O₃-35 mol% PbTiO₃ Ceramics Induced by the Penetration Twin

Authors:	Ui-Jin Chung Jong-Keuk Park Nong-Moon Hwang Ho-Yong Lee Doh-Yeon Kim

Affiliation:	School of Materials Science and Engineering, and Center for Microstructure Science of Materials, Seoul National University, Seoul 151–744, Korea;Korea Research Institute of Standards and Science, Taejon 305–606, Korea;Division of Metallurgical and Materials Engineering, Sunmoon University, Asan 336–840, Korea

Abstract:	Pb(Mg_1/3Nb_2/3)O₃-35 mol% PbTiO₃ (PMN-35PT) specimens with a 5 mol% excess PbO were prepared by excessive heat treatment at 1150°C to induce abnormal grain growth. Through electron backscatter diffraction analysis and the observation of a three-dimensional morphology, the abnormally grown PMN-35PT grains were found to be twinned crystals with penetration characteristics. The morphology of the PMN-35PT twinned crystal was crystallographically analyzed. The abnormal grain growth of PMN-35PT is suggested to be due to preferential growth at the reentrant angles formed by twins.

Keywords:	grain growth lead magnesium niobates lead titanate