RTGG法による結晶配向性CaBi_4Ti_4O_<15>およびSrBi_4Ti_4O_<15>の作製におけるヘテロ凝集の影響 Effect of Heterocoagulation on the Preparation of Textured CaBi_4Ti_4O_<15> and SrBi_4Ti_4O_<15> Made by Reactive-Templated Grain Growth Process

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著者

    • 梅澤 和泰 UMEZAWA Kazuhiro
    • 慶應義塾大学理工学部応用化学科 Department of Applied Chemistry, Faculty of Science and Technology, Keio University
    • 木村 敏夫 KIMURA Toshio
    • 慶應義塾大学理工学部応用化学科 Department of Applied Chemistry, Faculty of Science and Technology, Keio University

抄録

Textured CaBi<SUB>4</SUB>Ti<SUB>4</SUB>O<SUB>15</SUB> and SrBi<SUB>4</SUB>Ti<SUB>4</SUB>O<SUB>15</SUB> ceramics have been prepared by the reactive-templated grain growth process. When slurries for tape casting are prepared using a solvent, binder, and plasticizer, large agglomerates are formed in the slurries by heterocoagulation between Bi<SUB>2</SUB>O<SUB>3</SUB> and CaCO<SUB>3</SUB> or SrCO<SUB>3</SUB> particles. These agglomerates melt between 800° and 850°C, and the melt penetrates into surrounding powder layers, leaving large voids. Sintering at high temperatures cannot eliminate these voids, resulting in a low density. Furthermore, the voids disturb the alignment of platelike particles surrounding the voids. The use of dispersant in the preparation of the slurries suppresses the formation of the agglomerates, and dense, highly-textured materials are obtained.

収録刊行物

  • 粉体および粉末冶金  

    粉体および粉末冶金 55(4), 270-275, 2008-04-15 

    Japan Society of Powder and Powder Metallurgy

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各種コード

  • NII論文ID(NAID)
    10021173063
  • NII書誌ID(NCID)
    AN00222724
  • 本文言語コード
    JPN
  • 資料種別
    REV
  • ISSN
    05328799
  • NDL 記事登録ID
    9488281
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-274
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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