Synthesis of Monolithic Gel to Bulk glass-Ceramic in Multicomponent Li2O-Al2O3-SiO2 System

Sol-Gel법에 의한 Li2O-Al2O3-SiO2계 괴상겔 및 결정화유리의 합성

  • 양중식 (경희대학교) ;
  • 작화제부 (동부대학)
  • Published : 1988.05.01


The purpose of this investigation was to prepare multicomponent monolithic Li-Al-Si gels of composition(mol%) 16.67 Li2O-16.67 Al2O3-66.67 SiO2 and to convert the gels to monolithic glass-ceramic at low temperature without melting. The hydrolysis, DTA, TGA, TMA, SEM, pore distribution, density and the activation energy for crystallization of the glass-ceramic formation with rawmaterials of which tetraethl orhosilicate of networkforming cation(Si) is partially hydrolyzed, aluminum isoproxide and lithium methoxide prepared by Li-metal react with methanol were studied. The results were as follows : 1) Monolithic gels which were added with additional water, resulting in a total water content 2.5 to 3.0 times the stoichiometric amount required to fully hydrolyze the alkoxides. 2) Specimens were dried to form crylinders 60mm in length and 40mm in diameter in about 800 hrs at 5$0^{\circ}C$. 3) $\beta$-eucryptite crystals and $\beta$-spodumene crystals were detected in samples heated above 75$0^{\circ}C$. 4) Within the temperature and range of 25-50$0^{\circ}C$ and 1,00$0^{\circ}C$ the thermal expansion coefficient for crystallized samples were shown as 2.6-5.7$\times$10-7/$^{\circ}C$ and 7.4-12.5$\times$10-7/$^{\circ}C$, respectively. 5) The activation energy for the crystal growth was 11.01kcal/mol at 794$^{\circ}C$ to 85$0^{\circ}C$.



  1. Mater. Res. Soc. Symp. Proc. v.73 J.C. Pouxviel;J.P. Boilot;A. Dauger;L. Huber
  2. J. Non. Cryst. Solids v.95-96 H. Kozka;H. Kuroki;S. Sakka
  3. Am. Ceram. Soc Nucleation and Crystallization in Glasses J.H. Simmons
  4. 特公昭 40-201826 和田正道 (外2人)
  5. Glass Ceramics P.W. Mcmillan
  6. Mater. Res v.16 C.J. Brinker;S.P. Mukherjee
  7. ニコ一ガテス日刊工業新聞社 作花濟夫
  8. Chem. Soc. Japan S. Sakka
  9. J. Non-Cryst. Solids v.82 J. Kawaguchi;J. Iura;N. Taneda;H. Hishikura;Y. Kokubo
  10. J. Non-Cryst. Soilds v.83 I. Schwartz;P. Aderon;H. De Lambility;L.C. Klein
  11. J. Non - Cryst. Solids v.99 T. Adachi;S. Sakka
  12. J. Non. Cryst. Solids v.102 H. De Lambilly;L.C. Klein
  13. 第 80回 新材料硏究會講演 レポ一ト 作花濟夫
  14. Treaties on Mater. Sci. and Tech. S. Sakka;M. Tomozawa;R. Doremus
  15. Am. Ceram. Soc v.51 S.W. Freiman;L.L. Hench
  16. Sci. Ceram. Chem. Proc. G. Orcel;L.L. Hench
  17. Sci. Ceram. Chem. Proc G. Orcel;L.L. Hench
  18. Am. Ceram. Soc. Bull. v.64 S. Sakka
  19. Ultrastructure Processing Ceramics and Compositions L.L. Hench
  20. 特公昭 39-21049 田代仁外 (3人)
  21. J. Non. Cryst. Solids v.82 J. Covino;F.G.A. Ed Laat;R.A. Welsbe
  22. Mater. Res v.17 J. Zarzychi;M. Prassas;J. Phalippou
  23. J. Non. Cryst. Solids v.82 G. Orcel;J. Phalippou;L.L. Hench
  24. '87 Inter. Symp. and Exhibition on Sci. and Tech. of Sintering S. Sakka;H. Kozuka
  25. J. Non-Cryst. Solids v.48 J. Phalippou;M. Prassas;J. Zarzyck
  26. Bull. Inst. Chem. Res v.59 K. Matusita;S. Sakka
  27. Yogyo-Kyokai-Shi v.91 no.5 Z.J. Huang;T. Yoko;K. Kamya;S. Sakka