Structure and Grain Growth Habit of Directional Solidification Ceramics of (1-x)Pb(Mg1/3Nb2/3)O3 - xPbTiO3 (x=0.30, 0.33, 0.38) Relaxor Ferroelectric Solid Solutions

Journal of Inorganic Materials

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Structure and Grain Growth Habit of Directional Solidification Ceramics of (1-x)Pb(Mg_1/3Nb_2/3)O₃ - xPbTiO₃ (x=0.30, 0.33, 0.38) Relaxor Ferroelectric Solid Solutions

SUN Shi-Wen^1,2; PAN Xiao-Ming²; LI Dong-Lin²; LI Hong-Jun²; ZHU Li-Hui¹; HUANG Qing-Wei²; WANG Ping-Chu²

1.School of Materials Science and Engineering; Shanghai University; Shanghai 200072; China; 2. State Key Laboratory of High Performance Ceramics and Superfine Microstructure; Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050; China

Received:2003-04-16 Revised:2003-06-13 Published:2004-05-20 Online:2004-05-20

Abstract

Abstract: This work describes the grain growth habit of the (1-x)Pb(Mg_1/3Nb_2/3)O₃-xPbTiO₃
(PMN-PT or PMNT) system ferroelectric solid solutions prepared by a directional solidification technique. The results show that the preferential
direction of the grain growth depends not only on the composition of the melts, but also on the crucible pulling-down speed. For a fixed PMN/PT
ratio, e.g. 62/38, higher speed of crucible pulling-down leads to a preferential grain growth orientation of [110], rather than the [111],
which is usually reported in single crystal growth studies, whereas lower crucible pulling-down speed tends to produce [111] grain-orientation
ceramics. When the crucible is pulled down at a certain rate, the preferential grain-growth orientation changes from [111] to [110] with reducing PbTiO₃
molar contents.

Key words: PMN-PT, directional solidification ceramics, grain growth habit

CLC Number:

O732

SUN Shi-Wen,PAN Xiao-Ming,LI Dong-Lin,LI Hong-Jun,ZHU Li-Hui,HUANG Qing-Wei,WANG Ping-Chu. Structure and Grain Growth Habit of Directional Solidification Ceramics of (1-x)Pb(Mg_1/3Nb_2/3)O₃ - xPbTiO₃ (x=0.30, 0.33, 0.38) Relaxor Ferroelectric Solid Solutions[J]. Journal of Inorganic Materials.

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Structure and Grain Growth Habit of Directional Solidification Ceramics of (1-x)Pb(Mg_1/3Nb_2/3)O₃ - xPbTiO₃ (x=0.30, 0.33, 0.38) Relaxor Ferroelectric Solid Solutions

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