Effect of Al/Si ratio on crystallization of cordierite ceramics prepared by the sol-gel method

Jun Rok Oh, Hiroaki Imai, Hiroshi Hirashima

研究成果: Article査読

14 被引用数 (Scopus)

抄録

The application of cordierite ceramics as the electronic materials has recently extended immensely, because of their superior heat resistance, low dielectric constants, etc. In this study, the cordierite ceramics, which can be sintered at low temperature without any nucleation agents, were prepared by the sol-gel method. The effect of Al/Si ratio on the crystallization behavior and sintering was investigated. Metal alkoxides, Si(OC2H5)4, Al(OC4H9s)3, and Mg (OC2H5)2 were hydrolyzed in 2-methoxyethanol, resulting in gelation. The obtained gel powders were heat-treated at various temperatures. As the Al/Si ratio decreased, the deposition of μ-cordierite occurred at lower temperatures. The initial transformation of α-cordierite phase from μ-cordierite phase took place by heat treating at 950°C for 1h. However, the complete transformation to single α-cordierite phase was retarded and achieved at higher temperatures, >1050°C. With the increase of Al/Si ratio, the initial transformation to α-cordierite from μ-cordierite occurred at higher temperatures, while the complete transformation took place rapidly at lower temperatures, about 1000°C.

本文言語English
ページ(範囲)43-47
ページ数5
ジャーナルJournal of the Ceramic Society of Japan
105
1
DOI
出版ステータスPublished - 1997

ASJC Scopus subject areas

  • セラミックおよび複合材料
  • 化学 (全般)
  • 凝縮系物理学
  • 材料化学

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