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Phase Evolution of Solid‐State BaTiO 3 Powder Prepared by Different Starting BaCO 3
Author(s) -
Lee TingTai,
Huang ChiYuen,
Chang CheYuan,
Cheng IKuan,
Hu ChingLi,
Su CheYi,
Lee ChunTe,
Fujimoto Masayuki
Publication year - 2013
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/ijac.12072
Subject(s) - materials science , calcination , tetragonal crystal system , sintering , barium titanate , microstructure , ceramic , ceramic capacitor , phase (matter) , reducing atmosphere , chemical engineering , mineralogy , nanoparticle , activation energy , composite material , chemistry , nanotechnology , metallurgy , capacitor , physics , organic chemistry , quantum mechanics , voltage , engineering , catalysis , biochemistry
Two different specific surface area of starting Ba CO 3, 10 and 30 m 2 /g, are used to prepare solid‐state BaTiO 3 powder. Pure tetragonal BaTiO 3 was obtained at a lower calcination temperature with smaller Ba CO 3 , and the kinetic calculations of activation energy also agree with it. A clear, thin, and nano‐sized cubic BaTiO 3 clusters on TiO 2 particles were also observed. A narrower particle size distribution of BaTiO 3 powder (350 nm) was obtained from 30 m 2 /g of starting Ba CO 3 at 1000°C. After sintering with reducing atmosphere, the ceramics with potential of X8R or X7R specifications and a clear core–shell microstructure were obtained in this study.