Mechanochemical synthesis of LaCrO3 by grinding constituent oxides

Qiwu Zhang, Jinfeng Lu, Fumio Saito

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)

Abstract

Hydrous amorphous chromium oxide (Cr2O3·nH2O) and crystalline one (Cr2O3) powders prepared by heating Cr(OH)3·nH2O at different temperatures were separately ground with La2O3 powder using a planetary ball mill at room temperature to investigate mechanochemical synthesis of LaCrO3. Hydrous amorphous chromium oxide prepared reacts with La2O3 to form LaCrO3 and the reaction proceeds with an increase in grinding time. No reaction takes place in the case of crystalline Cr2O3. The ground sample consists of agglomerates and large particles with size up to around 100 μm and shows low specific surface area of about 5 m2/g. The mechanochemical method can be also used to synthesize other chromium rare earth complex oxides by grinding the mixture of hydrous chromium oxide and rare earth (Pr, Nd and Sm) oxides.

Original languageEnglish
Pages (from-to)145-149
Number of pages5
JournalPowder Technology
Volume122
Issue number2-3
DOIs
Publication statusPublished - 2002 Jan 22

Keywords

  • Agglomeration
  • Grinding
  • LaCrO
  • Perovskite

ASJC Scopus subject areas

  • Chemical Engineering(all)

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