Role of Liquid Phase in Achieving a Fine Microstructure and Diffusive Phase Transition of MgO-Doped BaTiO3

Two types of glass compositions, with MgO and CaO modifiers, respectively, were used to promote l`iquid‐phase sintering of 2 mol% MgO–BaTiO3 at 1280°C in reducing atmosphere (pO2=10−9 atm). By combining the observations of the grain size of about 1 μm for both specimens and the diffusive phase trans...

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Bibliographic Details
Published in:International journal of applied ceramic technology 2009-11, Vol.6 (6), p.679-686
Main Authors: Bae, Shin-Tae, Yim, Dong Kyun, Hong, Kug Sun, Park, Jin-Soo, Shin, Hyunho, Jung, Hyun Suk
Format: Article
Language:English
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Summary:Two types of glass compositions, with MgO and CaO modifiers, respectively, were used to promote l`iquid‐phase sintering of 2 mol% MgO–BaTiO3 at 1280°C in reducing atmosphere (pO2=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 BaTiO3 is necessary to yield the fine and composite microstructures via a dissolution–reprecipitation process. Further, a reasonable dopant provision to BaTiO3 has been shown to be required to achieve the diffusive phase transitions.
ISSN:1546-542X
1744-7402
DOI:10.1111/j.1744-7402.2008.02319.x