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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.118  No.1381 (September) (2010)  >  pp.823-826

Journal of the Ceramic Society of Japan
<<Previous article Vol.118  No.1381 (September) (2010)   pp.823 - 826 Next article>>

Microstructure control of Ce-TZP/Ba ferrite composites using an amorphous precursor of the second phase

Takashi KOJIMA1), Shinya OORI1), Takuya WATANABE1), Yuya SHIMADA1), Syunpei NORO1), Naofumi UEKAWA1) and Kazuyuki KAKEGAWA1)
1) Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University

  Composites consisting of Ce-TZP matrix and in situ-grown particles of barium ferrite (BaM) were prepared using various starting materials. For the starting material for the second phase, an amorphous precursor powder of BaM was prepared by coprecipitation and calcination. Uniform hematite particles were also prepared using liquid-phase synthesis under hydrothermal conditions. The Ce-TZP/20 wt % BaM composites were prepared by sintering the mixed powders of Ce-TZP, barium carbonate, hematite, and amorphous precursor of BaM. The aspect ratio of the in situ-grown BaM particles increased concomitantly with an increase in the mixing ratio of the amorphous precursor powder. The exaggerated grain growth of the BaM in the Ce-TZP matrix was efficiently suppressed by the addition of a small amount of barium carbonate and hematite to the amorphous precursor of BaM.


Keyword:
Composite, In-situ, Microstructure, Zirconia, Ferrite

Received: March 29, 2010
Accepted: May 20, 2010 , Published online: September 01, 2010
Copyright (c) 2010 The Ceramic Society of Japan

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