Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Crystallization of 90wt% Cordierite-10wt% Enstatite Melt by $TiO_2$ Addition

90wt% Cordierite-10wt% Enstatite 총체의 $TiO_2$ 첨가에 의한 결정화

  • Rhee, Jhun (Dept. of Ceramic Engineering, Inha University) ;
  • Han, Duck-Huyn (Dept. of Ceramic Engineering, Inha University) ;
  • Jo, Dong-Soo (Dept. of Ceramic Engineering, Inha University) ;
  • Jun, Jong-Pil (Dept. of Ceramic Engineering, Inha University)
  • 이준 (인하대학교 공과대학 무기재료공학과) ;
  • 한덕현 (인하대학교 공과대학 무기재료공학과) ;
  • 조동수 (인하대학교 공과대학 무기재료공학과) ;
  • 전정필 (인하대학교 공과대학 무기재료공학과)
  • Published : 1986.05.01
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Abstract

The effect of $TiO_2$ addition to the 90wt% Cordierite-10wt% Enstatite base glass was investi-gated to understand the crystallization behavior of the glass. Glasses with addition of $TiO_2$ less than 7, 5wt% had a tendency of surface crystallization and were cracked when heat treated and in this case the crystalline phase formed was indialite. glasses with addition of $TiO_2$ more than 10wt% to 15wt% were crystallized in bulk when heat treated and were suitable for glass-ceramics. The highest microhardness 1640kg/$mm^2$ was obtained when the glass of 12.5wt% $TiO_2$ addition was heat treated at 762$^{\circ}C$ for 60 minutes for nucleation and at 1135$^{\circ}C$ for 20 minutes for crystal growth and in general higher microhardness was obtained when crystalline phase of magnesium aluminum titanate and $\mu$-cordierite were developed. Avrami equation for crystal growth kinetics was applicable in glasses of less than 7.5 wt% $TiO_2$ addition and in case of glasses of more than 10wt% $TiO_2$ addition it was not applicable because of too fast crystal growth.

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References

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