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

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

  1. Glass Ceramics(2nd ed.) P. W. McMillan
  2. Introduction to Ceramics(2nd ed.) W. D. Kingery;H. K. Bowen;D. R. Uhlmann
  3. J. Mat. Sci. v.13 Cordierite Class-ceramics-Effect of TiO₂and ZrO₂Content on Phase Sequence during Heat treatment T. I. Barry;J. M. Cox;R. Morell
  4. Phase Diagrams for Ceramists, 1969 Supplement no.SUP. E. M. Levin;C. R. Robbins;H. F. McMurdie
  5. J. Mat. Sci. v.18 X-ray Diffraction Methods to Determine Crystallinity and Preferred Orientation of Lithium Disilicate in Li-Zn-Siliexte Glass Ceramic Fibers G. Cocco;A. Benedetty;G. Fagherazzi
  6. Colored Glasses W. A. Weyl
  7. J. Mat. Sci. v.8 Crystallization and Structure of a MgO-Al₂O₃-SiO₂-TiO₂Glass Ceramics W. A. Zdaniewski
  8. Advances in Ceramics;Nucleation and Crystallization in Glasses v.4 Nucleation and Crystallization Kinetics of an MgO-Al₂O₃-SiO₂Base Glass with Various Dopants W. Vogel;W. Holand;J. H. Simmons(ed.);D. R. Uhlmann(ed.);G. Ⅱ. Beall(ed.)
  9. J. Am. Cer. Soc. v.36 no.12 Reaction in the System Li₂O-MgO-Al₂O₃-SiO₂: I. The Cordierite-Spodumene Join M. D. Karkahanavala;F. A. Hummel
  10. Am. Cer. Soc. Bull. v.63 no.5 Preparation and Properties of Mullite-Cordierite Composites B. H. Mussler;M. W. Shafter
  11. J. Chem. Phys. v.7;8;9 no.12;2;2 Kinetics of Phase Change M. Avrami
  12. Advances in Nucleation and Crystallization in Glasses A in Glasses H. D. Keith;F. J. Padden, Jr.;L. L. Hench(ed.);S. W. Freiman(ed.)
  13. J. Appl. Phys. v.34 no.8 Spherulitic Crystallization Phenomenological Theory of Spherulitic Crystallization S. W. Freiman;G. Y. Onoda, Jr;A. G. Pincus