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Role of Liquid Phase in Achieving a Fine Microstructure and Diffusive Phase Transition of MgO‐Doped BaTiO 3
Author(s) -
Bae ShinTae,
Yim Dong Kyun,
Hong Kug Sun,
Park JinSoo,
Shin Hyunho,
Jung Hyun Suk
Publication year - 2009
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2008.02319.x
Subject(s) - materials science , microstructure , dissolution , dopant , phase (matter) , sintering , doping , reducing atmosphere , chemical engineering , solubility , composite number , yield (engineering) , phase transition , grain size , mineralogy , analytical chemistry (journal) , composite material , metallurgy , thermodynamics , chemistry , chromatography , optoelectronics , organic chemistry , physics , engineering
Two types of glass compositions, with MgO and CaO modifiers, respectively, were used to promote l`iquid‐phase sintering of 2 mol% MgO–BaTiO 3 at 1280°C in reducing atmosphere ( p O 2 =10 −9 atm). By combining the observations of the grain size of about 1 μm for both specimens and the diffusive phase transition only when MgO modifier was used, it has been interpreted that an appropriate solubility of BaTiO 3 is necessary to yield the fine and composite microstructures via a dissolution–reprecipitation process. Further, a reasonable dopant provision to BaTiO 3 has been shown to be required to achieve the diffusive phase transitions.