Crystallization and Transparency of $Li_2O$.$2SiO_2$ Glass-Ceramics

$Li_2O$.$2SiO_2$. 유리의 결정화와 투광성에 관한 연구

  • 최병현 (아주대학교) ;
  • 안재환 (아주대학교) ;
  • 지응업 (동양공업전문대학)
  • Published : 1990.04.01


Li2O.2SiO2 glass-ceramics were made from the melt by the nucleation and growth treatment. The optimum nucleation temperature and time were determined from DTA curves of as-quenched and thermally treated glasses, and found to be 44$0^{\circ}C$ and 3hrs. The optical microscopic technique was also used to support this result. The volume fractions of crystals present in the partially crystallized specimens were measured using the optical microscopy and the amorphous X-ray scattering methods. The degree of crystallization increased with increasing the crystallization temperature and time. The crystalline phase identified by X-ray diffraction was lithium disilicate. As the crystallinity increased up to 95%, the transmittance of glass-ceramics was decreased linearly. It was also found that for the same heat treatment condition (575$^{\circ}C$, 30min), a thicker specimen showed higher transmittance, presumably due to less crystallinity.



  1. Phys. Chem. Glasses v.14 no.6 Liquid Phase Separation and Crystal Growth in Li₂O · SiO₂Glasss M. Tomozawa
  2. The Scientific Papers of Prof. M. Tashiro and His Collaborators v.1;2 M. Tashiro
  3. J. Non-Crystal. Solids v.38;39 Kinetics Study on Crystallization of Glass by Differential Thermal Analysis-Criterion on Application of Kissinger Plot K. Matusita;S. Sakka
  4. J. Mat. Sci. v.16 Nucleation in Glass and Difference Thermal Analysis A. Marotta(et al.)
  5. Thermochimica Acta v.40 Surface and Bulk Crystallization in Non-Isothermal Devitrification of Glasses A. Marotta(et al.)
  6. J. Non-Crystalline Solids v.29 Crystallozation and Phase Separation of Li₂O-SiO₂Glass P. Hautojarv(et al.)
  7. J. Am. Ceram. Soc. v.51 no.7 Kinetics of Crystallization in Li₂O · SiO₂Glasses S.W. Freiman;L.L. Hench
  8. 工業化學雜誌 v.67 no.6 リチアケイ酸ガラスの結晶化の硏究 松田二郞;水渡英二
  9. Thermochimica Acta v.25 Kinetics of Devitrification and Differential Thermal Analysis A. Marotta;A. Buri
  10. J. Am. Ceram. Soc. v.45 Determination of Percent Crystallinity of Partly Devitrified Glass by X-ray Diffraction S.M. Ohlberg;D.W. Strickler
  11. ガラス工學ハドプシワ 森谷太郞(外 3人)
  12. J. Am. Ceram. Soc. v.45 no.1 Further Studies of the Crystallization of a Lithium Silicate Glass Guy E. Rindone
  13. Quantitative Stereology Ervin E. Underwood
  14. ガラスの化學 土橋正二
  15. J. Am. Ceram. Soc. v.44 no.10 Study of Devitrification of Lithium Glass R.J. Jaccodine
  16. Ibid v.20 no.4 The Crystallization Kinetics of Li₂O· SiO₂Glasses Studied by Amorphous X-ray Scattering V. Komppa
  17. J. Am. Ceram. Soc. v.47 no.6 Electron Microscopic Technique for Determining the Percent Crystallinity of Glass-Ceramic Materials G.B. Carrier
  18. Trans. Met. Soc. AIME v.223 The Estimation of Particle-Size Distribution from Simple Counting Measurements Made on Random Plane Sections R.T. DeHoff
  19. Phys. Chem. Glasses v.12 no.2 The Early Stages of Crystallization in a Li₂O· 2SiO₂Glass L.L. Hench(et al.)
  20. J. Kor. Ceram. Soc. v.26 no.5 Scoria 유리 (CaO·MgO·Al₂·O₃·SiO₂계)의 결정화에 미치는 $Fe^{2+}/Fe^{3+}$비 효과 최병현;지응업
  21. Phys. Chem. Glasses v.15 no.4 Kinetics of Crystal Nucleation in Lithium Silicate Glasses P.F. James
  22. Phys. Chem. Galsses. v.14 no.4 Effect of Added Oxides on the Crystalization of Li₂O· 2SiO ₂Glasses K. Matusita;M. Tashiro
  23. J. Japan Ceram. Soc. The Effect of Additives (Sucrose, CaO, MgO and SiO₂) on the Crystallization and Physical Properties of the Scoria Melt Byung-Hyun Choi;Kunio Kimura;Ung-Up Chi
  24. Trans. Met. Soc. AIME v.224 The Determination of the Size Distribution of Ellipsoidal particles from Measurements Made on Random Plane Sections R.T. DeHoff
  25. J. Mat. Sci. v.10 Study on Crystallization of Glass by Differential Thermal Analysis;Effect of Added Oxide on Crystallization of Li₂O· SiO₂ Glasses K. Matusita;S. Sakka
  26. Phys. Chem. Glasses v.10 no.5 Relationship Between Phase Separation and Crystallization in Li₂O· 2.5SiO₂Glass a Lithium Silicate Containing a Large Amount of Titanium Oxide K. Nakagawa;T. Izumitani