Properties of Alumina-Zirconia Powder Prepared from Aluminium Chelate Compound and Zirconium Alkoxide

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  • KAWABATA Koji
    Okayama Ceramics Research Foundation
  • YOSHIMATSU Hideyuki
    Industrial Technology Center of Okayama Prefecture
  • YABUKI Tatsumi
    Industrial Technology Center of Okayama Prefecture
  • KUBOTSU Akira
    Industrial Technology Center of Okayama Prefecture
  • HAYAKAWA Satoshi
    Department of Bioscience and Technology, Faculty of Engineering, Okayama University
  • OSAKA Akiyoshi
    Department of Bioscience and Technology, Faculty of Engineering, Okayama University
  • MIURA Yoshinari
    Department of Environmental Chemistry and Materials, Faculty of Environmental Science and Technology, Okayama University

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Other Title
  • アルミニウムキレート化合物とジルコニウムアルコキシドより作製したアルミナ-ジルコニア粉体の性質
  • アルミニウム キレート カゴウブツ ト ジルコニウム アルコキシド ヨリ サク

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Abstract

Alumina-zirconia powder (AZ) was prepared by thermal decomposition of organic precursors synthesized from ethyl acetoacetate aluminium diisopropoxide and zirconium tetra-n-butoxide. The specific surface area of AZ was higher than that of alumina-zirconia powder (ALK) prepared from aluminium tri-sec-butoxide and zirconium tetra-n-butoxide in the range of 0-40mol% ZrO2. The pore radius for AZ containing 0-40mol% ZrO2 distributed from 1 to 3nm. The true density of AZ was lower than that of ALK in the range of 0-40mol% ZrO2. Four- and 6-coordinated Al atoms existed in ZrO2-free AZ, while 5-coordinated Al atoms in addition to 4- and 6-coordinated Al atoms existed in AZ containing 20-80mol% ZrO2. These results indicate that alumina component and zirconia component in AZ were mixed homogeneously at the atomic level.

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