Properties of alumina-zirconia powder prepared from aluminium chelate compound and zirconium alkoxide

Koji Kawabata, Hideyuki Yoshimatsu, Tatsumi Yabuki, Akira Kubotsu, Satoshi Hayakawa, Akiyoshi Osaka, Yoshinari Miura

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4 Citations (Scopus)

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 0-40 mol% ZrO 2. The pore radius for AZ containing 0-40 mol% ZrO 2 distributed from 1 to 3 nm. The true density of AZ was lower than that of ALK in the range of 0-40 mol% ZrO 2. Four- and 6-coordinated Al atoms existed in ZrO 2-free AZ, while 5-coordinated Al atoms in addition to 4- and 6-coordinated Al atoms existed in AZ containing 20-80 mol% ZrO 2. These results indicate that alumina component and zirconia component in AZ were mixed homogeneously at the atomic level.

Original languageEnglish
Pages (from-to)155-159
Number of pages5
JournalNippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
Volume106
Issue number2
Publication statusPublished - 1998

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Keywords

  • Al MAS-NMR
  • Alumina-zirconia powder
  • Aluminium chelate compound
  • Pore size distribution
  • Specific surface area
  • True density
  • Zirconium alkoxide

ASJC Scopus subject areas

  • Ceramics and Composites

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