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Grain Growth Control and Solid‐State Crystal Growth by Li 2 O/PbO Addition and Dislocation Introduction in the PMN–35PT System
Author(s) -
Kim MinSoo,
Fisher John G.,
Kang SukJoong L.,
Lee HoYong
Publication year - 2006
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.1551-2916.2005.00883.x
Subject(s) - nucleation , materials science , crystallite , crystal growth , grain growth , dislocation , crystal (programming language) , crystallography , annealing (glass) , seed crystal , dopant , single crystal , grain size , analytical chemistry (journal) , mineralogy , chemistry , metallurgy , composite material , doping , optoelectronics , programming language , organic chemistry , chromatography , computer science
Grain growth behavior and solid‐state single crystal growth (SSCG) in the Pb(Mg 1/3 Nb 2/3 )O 3 –35 mol% PbTiO 3 (PMN–35PT) system have been investigated with varying Li 2 O/PbO ratios. The effect of dislocation density on crystal growth has also been studied. For SSCG, a BaTiO 3 single‐crystal seed was embedded in a polycrystalline PMN–PT matrix. During annealing, a PMN–PT single crystal grew from the seed at the cost of the small matrix grains. Addition of Li 2 O dopant first enhanced and then reduced abnormal grain growth in the matrix. In the 2 mol% Li 2 O and 6 mol% PbO excess PMN–PT samples annealed at 1200°C, considerable single‐crystal growth occurred without formation of abnormally large grains in the matrix. Increasing the dislocation density in the BaTiO 3 seed crystal resulted in enhanced growth of single crystals. These results were explained in terms of interface reaction‐controlled nucleation and growth, based on crystal growth theories.