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Preparation of 〈110〉‐Textured BaTiO 3 Ceramics by the Reactive‐Templated Grain Growth Method Using Needlelike TiO 2 Particles
Author(s) -
Sato Tomoya,
Yoshida Yusuke,
Kimura Toshio
Publication year - 2007
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.1551-2916.2007.01837.x
Subject(s) - materials science , calcination , ceramic , slurry , sintering , rutile , grain growth , chemical engineering , casting , tape casting , mineralogy , composite material , grain size , metallurgy , chemistry , biochemistry , engineering , catalysis
Dense, highly 〈110〉‐textured BaTiO 3 ceramics were prepared by the reactive‐templated grain growth method. Needlelike TiO 2 (rutile) particles with their needle axis parallel to 〈001〉 were used as reactive template particles. Slurry containing an equimolar mixture of TiO 2 and BaCO 3 was tape cast to form a green compact, in which TiO 2 particles were aligned with their needle axis parallel to the casting direction. Calcination of the green compact changed TiO 2 particles into BaTiO 3 grains with their 〈110〉 direction parallel to the casting direction, for which the topotaxial relation ofwas responsible. Sintering yielded a dense, highly textured BaTiO 3 compact.