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Abnormal Grain Growth of Pb(Mg 1/3 Nb 2/3 )O 3 ‐35 mol% PbTiO 3 Ceramics Induced by the Penetration Twin
Author(s) -
Chung UiJin,
Park JongKeuk,
Hwang gMoon,
Lee HoYong,
Kim DohYeon
Publication year - 2002
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2002.tb00582.x
Subject(s) - materials science , grain growth , crystallography , analytical chemistry (journal) , electron backscatter diffraction , grain size , penetration (warfare) , mineralogy , crystal growth , microstructure , chemistry , metallurgy , chromatography , operations research , engineering
Pb(Mg 1/3 Nb 2/3 )O 3 ‐35 mol% PbTiO 3 (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.