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Journal of Materials Science

, Volume 42, Issue 24, pp 10180–10187 | Cite as

Nucleation behavior and microstructure of Al2O3-poor LAS glass–ceramics

  • K. D. KimEmail author
  • S. H. Lee
  • J. H. Hwang
  • W. S. Seo
Article
  • 92 Downloads

Abstract

Influence of MgO and K2O on the nucleation behavior of Al2O3-poor LAS (Li2O–Al2O3–SiO2) base glasses was investigated by thermal analysis and, the effect on microstructure and surface topography of glass–ceramics was also examined by SEM, AFM and TEM. According to results of thermal analysis, the exothermic peak temperature of the glass showed a decrease with increase of nucleation temperature to nucleation time of 6 h. But some glasses nucleated for 9 h showed nucleation rate-like curve with maximum point. The dependence of reciprocal value of the exothermic peak temperature on the nucleation temperature indicated that an introduction of MgO might accelerate the nucleation of the base glass and thus result in rough surface topography of glass–ceramics. On the other hand, in the case of glass–ceramics containing K2O the main crystalline phase was lithium metasilicate and they showed fine microstructure resulting in smooth surface topography. TEM micrographs of as-quenched and nucleated glasses showed no trace of phase separation affecting nucleation or final microstructure.

Keywords

Phase Separation Li2O Hard Disk Drive Nucleation Effect Tridymite 

Notes

Acknowledgements

A part of this work was performed in Fraunhofer Insitut Silicatforschung (ISC), Wuerzburg, Germany. The corresponding author acknowledges for the kind help of Prof. Dr. G. Mueller, Dr. B. Durschang and Dr. M. Krauss in ISC, and thanks Korea Research Foundation Grant (KRF 2003–013-D00056) for the financial support during stay in ISC.

References

  1. 1.
    Lewis MH (1989) In: Glasses and glass–ceramics. Chapman and Hall p 226Google Scholar
  2. 2.
    Goto N, Yamaguchi K (1996) USA-pat. no. 5567217. Filed date May. 16, 1995, issued date Oct. 22, 1996Google Scholar
  3. 3.
    Yamaguchi K (1999) USA-pat. no. 5985777. Filed date Sep. 10, 1998, issued date Nov. 16, 1999Google Scholar
  4. 4.
    Goto N (1995) New Glass 10(4):56Google Scholar
  5. 5.
    Pannhorst W (2000) Glastech Ber Glass Sci Technol 73C1:28Google Scholar
  6. 6.
    Kim KD, Kim YJ, Hwang JH (2002) Glass Technol 43C:202Google Scholar
  7. 7.
    Levin EM, Robbins CR, McMurdie HF (1985) In: Phase diagrams for ceramists. The American Ceramic Society, p 118Google Scholar
  8. 8.
    Xu XJ, Ray CS, Day DE (1991) J Am Ceram Soc 74:909CrossRefGoogle Scholar
  9. 9.
    Ray CS, Day DE (1997) J Am Ceram Soc 80:3100CrossRefGoogle Scholar
  10. 10.
    Kim KD, Lee SH, Ahn HK (2004) J Non-Cryst Solids 336:195CrossRefGoogle Scholar
  11. 11.
    Burgner LL, Weinberg MC (2000) J Non-Cryst Solids 261:161CrossRefGoogle Scholar
  12. 12.
    Marotta A, Buri A, Branda F, Saiello S (1982) In: Advance in ceramics: Vol. 4. Nucleation and crystallization in glasses. American Ceramic Society, Columbus, OH, p 146Google Scholar
  13. 13.
    Wakasugi T, Burgner LL, Weinberg MC (1999) J Non-Cryst Solids 244:63CrossRefGoogle Scholar
  14. 14.
    Heslin MR, Shelby JE (1992) In: Weinberg MC (ed) Ceramic transactions: Vol. 30. Nucleation and crystallization in liquids and glasses American Ceramic Society, Columbus, OH, p 189Google Scholar
  15. 15.
    Frade JR, Queiroz CM, Fernandes MH (2004) J Non-Cryst Solids 333:263CrossRefGoogle Scholar
  16. 16.
    McMillan PW (1979) In: glass–ceramics. Academic Press, p 100Google Scholar
  17. 17.
    Zanotto ED, James PF (1983) In: Proceedings of the 13th Int. Congress on Glass, Hamburg published by Verlag der DGG, p. 794Google Scholar
  18. 18.
    Ramsden AH, James PF (1984) J Mat Sci 19:1406CrossRefGoogle Scholar
  19. 19.
    Ramsden AH, James PF (1984) J Mat Sci 19:2894CrossRefGoogle Scholar
  20. 20.
    Moriya Y, Warrington DH, Douglas RW (1967) Physics Chem Glasses 8:19Google Scholar
  21. 21.
    Haller W, Blackburn DH, Simmons JH (1974) J Am Ceram Soc 57:120CrossRefGoogle Scholar
  22. 22.
    Barry TJ, Lay LA, Miller RP (1970) Discuss Farad Soc 50:214CrossRefGoogle Scholar
  23. 23.
    Nakagawa K, Izumitani T (1972) Physics Chem Glasses 3:85Google Scholar
  24. 24.
    Kawamoto Y (1985) J Mat Sci 20:2695CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • K. D. Kim
    • 1
    Email author
  • S. H. Lee
    • 1
  • J. H. Hwang
    • 2
  • W. S. Seo
    • 2
  1. 1.Department of Materials Science & EngineeringKunsan National UniversityKunsanKorea
  2. 2.Korea Institute of Ceramic Engineering & TechnologySeoulKorea

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