Preparation and Characterization of Liquid-Sintered CaS

• HIRAKAWA Toshihiro

  Department of Applied Science for Electronics and Materials, Graduate School of Engineering Sciences, Kyushu University

• IWASAKI Minehito

  Department of Applied Science for Electronics and Materials, Graduate School of Engineering Sciences, Kyushu University

• TAKEBE Hiromichi

  Department of Applied Science for Electronics and Materials, Graduate School of Engineering Sciences, Kyushu University

• MORINAGA Kenji

  Department of Applied Science for Electronics and Materials, Graduate School of Engineering Sciences, Kyushu University

Bibliographic Information

Other Title

• ＣａＳ焼結体の作製とキャラクタリゼーション
• CaS ショウケツタイ ノ サクセイ ト キャラクタリゼーション

Abstract

Dense CaS ceramics were prepared by liquid-phase sintering with Ga₂S₃ additives (0 ∼ 1.0 mol%). A relative density of 96.2% was achieved by the sintering of CaS samples with 0.5mol% Ga₂S₃, fired at 1573K for 6h in Ar flow. Sintering process was investigated with scanning electron microscopy observations and linear shrinkage measurements. The sintering process of Ga₂S₃-doped CaS was found to be followed by 3 steps: (1) the rearrangement of CaS particles by CaS-Ga₂S₃ liquid, (2) the dissolution of CaS particles and the precipitation of CaS grains due to diffusion-controlled process and (3) the growth of precipitated CaS grains. X-ray diffraction and microstructural analyses with an energy dispersive X-ray fluorescence spectrometer revealed that sintered CaS has mainly CaS phase and CaS-Ga₂S₃ liquid segregated around grain boundaries. The thermal expansion coefficient of sintered CaS was 19.1 × 10^-6/K in the range room temperature to 1273K. It was suggested that ceramic materials with similar thermal expansion coefficients are appropriate for the substrate of CaS based thin film electroluminescence.

Journal

• Shigen-to-Sozai

  Shigen-to-Sozai 119 (12), 755-758, 2003

  The Mining and Materials Processing Institute of Japan

Keywords

• CaS
• Ga₂S₃
• Liquid-phase Sintering
• Microstructure
• Thermal Expansion Coefficient

Details

• CRID: 1390282681026094848
• NII Article ID: 10011983201
• NII Book ID: AN10062646
• DOI: 10.2473/shigentosozai.119.755
• COI: 1:CAS:528:DC%2BD2cXjs1SnsA%3D%3D
• ISSN: 18806244
• ISSN: 09161740
• ISSN: http://id.crossref.org/issn/09161740
• NDL BIB ID: 6809829
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6809829
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed