Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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The Study on Fabrication of LAS System Ceramics for Thermal Shock Resistance from Silicate Minerals: (I) Preparation of Eucryptite Powders with Sillimanite Group, Kaolin Group Minerals

실리케이트 광물을 이용한 내열충격성 LAS계 세라믹스의 제조에 관한 연구: (I) Sillimanite와 Kaolin족 광물을 이용한 Eucryptite 분말합성

  • 박한수 (경남대학교 무기재료공학과) ;
  • 조경식 (연세대학교 세라믹공학과) ;
  • 문종수 (경남대학교 무기재료공학과)
  • Published : 1994.05.01
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Abstract

With low thermal expansion coefficients, eucryptite (Li2O.Al2O3.2SiO2) and spodumene (Li2O.Al2O3.4SiO2) in LAS ceramic system show good thermal shock resistance. In this study, sillimanite or kaolin group silicate minerals and Li2CO3 were used as starting materials, and if necessary SiO2 or Al2O3 were added for making stoichiometrically formed specimens. By this process, eucryptite powders were synthesized and characterized. The powder mixtures of lithiumcabonate and silicate minerals calcined at 80$0^{\circ}C$ for 2 hrs were made into powder compacts. $\beta$-Eucryptite single phase was formed via intermediate phases of Li2SiO3 and LiAlO2 et al, by heating at 110$0^{\circ}C$ or 120$0^{\circ}C$ for 10 hrs from those powder compacts. When using the sillimanite group minerals, Virginia kyanite or andalusite was reacted to form eucryptite at 120$0^{\circ}C$and CMK International kyanite were completed at 110$0^{\circ}C$. When kaolin group minerals were used, it was found that the synthesizing temperature (100$0^{\circ}C$) of $\beta$-eucryptite from the mixture of New Zealand white kaolin was lower than that from Hadong pink kaolin (110$0^{\circ}C$). The Microstructure of systhesized powder showed the irregular lump shape such as densed crystallines.

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References

  1. セラミシクス v.14 no.11 低膨脹 セラミシクス 熱膨脹と 結晶構造 宇田川 重和;井川博行
  2. J. Am. Ceram. Soc v.51 no.11 Thermal Expansion of Synthetic β-Spodumene and β-Spodumene-Silica Solid Solutions W. Ostrtag;G.R. Fisher;J.P. Williams
  3. J. Am Ceram. Soc v.72 no.10 Sinterable β-Spodumene Glasses-Ceramics S. Knickerboker;M.R. Tuzzolo;S.Lawhorn
  4. J. Am Ceram Soc v.59 no.9-10 Strength and Microstructure in Lithium Disilicate Glass-Ceramics M.P. Borom;A.M. Turkalo;R.H. Doremus
  5. Am. Ceram. Soc. Bull v.68 no.11 Li₂O3-Al₂O₃-SiO₂ Glass-Ceramics H. Scheidler;E. Rodek
  6. Ceram Eng Sci Proc v.10 no.7-8 Processing and Sintering of Sol-Gel Derived Lithinum Aluminosilicate Powders R.R. Haghighat;D. Treacy;C.G. Pantano;L.C. Klein
  7. J. Am. Ceram Soc v.64 no.4 Kinetics of Dissolution and Crystallization in β-Spodumene Glass-Ceramics K.H. Dalal;R. Raj
  8. J. Mater. Sci v.64 no.4 Preparation of Lithium Alumilosilicate Glass-Ceramic Monolith from Metal-Alkoxide Solution J.S. Yang;S. Sakka;T. Yoko;H. Kozuka
  9. J. Chem. Soc.Jpn v.10 Preparation and Crystallization of Precursor Powders in Li₂O-Al₂O₃-SiO₂ System H. Suzuki;J. Takahashi;H. Saito
  10. J. Kor. Ceram. Soc v.28 no.5 A Study on the Microstructual Control of LAS Ceramics (Ⅰ);Influe-nce of Li₂O·4B₂O₃ Frit Addition on the Microstructure and Thermal Expansion of β-Eucryptite Ceramics J.H. Park;H.M. Kim;H.S. Lee
  11. J. Kor. Ceram Soc v.29 no.7 A study on the Microstructual Control of LAS Ceramics (Ⅱ);Influe-nce of Li₂O·4B₂O₃ Frit Addition on the Microsturucture and Thermal Expansion of β-Spodumence J.H. Park;H.M Kim;H.S. Lee
  12. J. Kor Ceram. Soc. v.29 no.8 A Study on the Microstructural Control of LAS Ceramics (Ⅲ);Influence of Li₂O·4B₂O₃ Frit Addtion on the Microstructure and Thermal Expansion of β-Spodumene made from Kaolinite J.H. Park;H.M Kim;H.S. Lee
  13. Thermochim. Acta v.110 Mechanochemistry of Inorganic Solids V.V. Boldyrev
  14. J Mater. Sci. Lett v.5 Correlation between Crystallite Size and Microstrains in Materials Subjected to Thermal and/or Mechanical Treatments J.M. Criado;M. Gonzalez;C. Real
  15. The Chemistry and Physics of Clays and Other Ceramic Materials R.W. Grimshaw
  16. J. Am. Ceram Soc. v.8 no.8 Formation of Mullite from Kyanite Andalusite and Sillimanite J.W. Greig
  17. J. Am. Ceram Soc v.42 no.7 The Kaolinite-Mullite Reaction SeriesⅠ A Survey of Outstanding Problems;Ⅱ. Meta-Kaolin;Ⅱ. ;The High-Temperature Phases G.W. Brindley;M. Nakahira
  18. The Crystalline State Ⅳ.Cristal Structures of Minerals L. Bragg
  19. J Am. Ceram. Soc v.36 no.11 Palmour Ⅲ K.G. Skinner;W.H. Cook;R.A. Potter;H. Palmour