Mechanochemical synthesis of ZrTiO4 precursor from inhomogeneous mixed gels

Tetsuhiko Isobe, Yutaka Okamoto, Mamoru Senna

研究成果: Conference article査読

5 被引用数 (Scopus)

抄録

Effects of vibration ball-milling of a powdered mixture of two gels, prepared from mixing ZrO2 and TiO2 sols, on crystallization processes during heating are studied in order to elucidate enhanced mechanochemical reactions with the aid of hydroxyl groups. TiO2 (anatase) and ZrO2 (tetragonal) crystallized at 698 K and 712 K, respectively, when heatingnon-milled gel mixture at 10 K min-1 in air. Few reactions between the two phases were detected below 1023 K. After vibro-milling a powdered gel mixture at room temperature for 3 to 30 h, ZrTiO4 (orthorhombic) crystallized directly from non-crystalline precursors on heating to 1023 K. The fraction of crystallized ZrTiO4, determined by Raman spectroscopy, increased linearly with increasing the index of micro-homogeneity for non-heated gels. We suggest that short-range ordering of ZrTiO4 rather than crystallization of individual oxides occurs through the non-thermal atomic movement between different metallic species under mechanical stress.

本文言語English
ページ(範囲)273-277
ページ数5
ジャーナルMaterials Research Society Symposium - Proceedings
346
DOI
出版ステータスPublished - 1994 1 1
イベントProceedings of the 1994 MRS Spring Meeting - San Francisco, CA, USA
継続期間: 1994 4 41994 4 8

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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