Journal of Materials Science

, Volume 26, Issue 18, pp 5013–5018 | Cite as

Sulphurization of coprecipitated carbonates for formation of CaLa2S4

  • Li Hsing Wang
  • Min Hsiung Hon
  • Wen Liang Huang
  • Whai Yuh Lin
Papers

Abstract

Factors including BET surface area and La/Ca mole ratio of the coprecipitated carbonates, pH value of the solvent and decomposition atmosphere before sulphurization for fabrication of ultrafine CaLa2S4 powder were investigated. The CaLa2S4 powder was formed through decomposition of coprecipitated carbonates in vacuum and sulphurization with hydrogen sulphide at low temperature. The resultant powder was determined to be a pure CaLa2S4 without oxysulphide phase, as analysed by X-ray diffraction. It consisted of fine particles of size ∼1.6 μm and showed translucency after sintering at 1400 °C under an H2S atmosphere.

Keywords

Hydrogen Polymer Atmosphere Sulphide Fine Particle 

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Copyright information

© Chapman & Hall 1991

Authors and Affiliations

  • Li Hsing Wang
    • 1
  • Min Hsiung Hon
    • 1
  • Wen Liang Huang
    • 1
  • Whai Yuh Lin
    • 2
  1. 1.Department of Materials EngineeringNational Cheng Kung UniversityTainanTaiwan
  2. 2.Materials Research and Development CentreChung Shan Institute of Science and TechnologyTaiwan

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