Formation of CaTiO3 by grinding from mixtures of CaO or Ca(OH)2 with anatase or rutile at room temperature

Guomin Mi, Fumio Saito, Shigeru Suzuki, Yoshio Waseda

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Room temperature grinding by a planetary ball mill has been applied to four kinds of mixtures prepared from CaO or Ca(OH)2 and anatase or rutile (TiO2). Crystalline CaTiO3 can be mechanochemically synthesized by grinding the mixture of CaO with both forms of TiO2 but is difficult to obtain from the mixtures of Ca(OH)2 and TiO2. These observations are in contrast to the results of Avvakumov et al. [E.G. Avvakumov, E.T. Devyatkina, N.V. Kosova, Mechanochemical reactions of hydrated oxides, J. Solid State Chem. 113 (1994) 379-383] and are in agreement with the thermodynamic data. The reactivity of CaO or Ca(OH)2 with anatase is slightly higher than is the case with rutile. Heating of the ground mixtures at about 900-1200 K is found to be effective for producing crystalline CaTiO3.

Original languageEnglish
Pages (from-to)178-182
Number of pages5
JournalPowder Technology
Volume97
Issue number2
DOIs
Publication statusPublished - 1998 Jun 15

Keywords

  • Calcium hydroxide
  • Calcium oxide
  • Calcium titanate
  • Grinding
  • Mechanochemistry
  • Planetary ball mill
  • Titanium dioxide

ASJC Scopus subject areas

  • Chemical Engineering(all)

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