Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Preparation and Properties of Cordierite Aluminium Titanate Composites

코디에라이트-티탄산알루미늄 복합체의 제조 및 특성

  • 송휴섭 (한국과학기술연구원 세라믹스부) ;
  • 김상우 (한국과학기술연구원 세라믹스부) ;
  • 장성도 (한국과학기술연구원 세라믹스부) ;
  • 손용배 (한국과학기술연구원 세라믹스부)
  • Published : 1990.03.01
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Abstract

The densification behaviro and resulting properties of cordierite-aluminium titanate composites containing 5 to 40wt.% aluminium titanate were investigated. Compared with cordierite monolithics a substantial increase of sintering temperature range for composites was observed, which was due to the formation of cordierite and glass phase at relatively low temperatures. The bending strength of composites showed its maximum at 30wt.% aluminium titanate content, which was about 50% increase relative to the cordierite monolithics, then decreased by a small amount at 40wt.% aluminium titanate content. The decrease was explained by the increase of microcracks whose presence was confirmed by the hysteresis of thermal expansion curve of composites. However, the microcracks formed was not severe enough to produce a significant decrease in strength, which was also evidenced by the continuous increase of thermal expansion coefficient up to 40wt.% aluminium titanate content.

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