Non-isothermal crystallization of K2O·TiO2·3GeO2 glass
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The crystallization of K2O·TiO2·3GeO2 glass under non-isothermal condition was studied. In powdered glass with particle sizes less than 0.15 mm, surface crystallization was dominant and an activation energy of crystal growth of E a,s=327±50 kJ mol−1 was calculated. In the size range 0.15 to 0.45 mm, both surface and volume crystallization occurred. For particle sizes >0.45 mm, volume crystallization dominated with spherulitic morphology of the crystals growth and E a,v=359±64 kJ mol−1 was calculated.
Keywordscrystallization glass kinetics K2TiGe3O9
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- 1.S. Grujić, N. Blagojević, M. Tošić and V. Živanović, Ceram. Silik., 49 (2005) 270.Google Scholar
- 5.S. R. Grujić, Ph.D. Thesis, Belgrade University, 2007.Google Scholar
- 6.S. R. Grujić, N. S. Blagojević, M. B. Tošić, V. D. Živanović and J. D. Nikolić, 39th International October Conference on Mining and Metallurgy-IOCMM 2007, October 07–10, 2007, Sokobanja, Serbia Proceedings, p. 241.Google Scholar
- 7.JCPDS 27-0394.Google Scholar
- 17.J. Šesták, Phys. Chem. Glass, 15 (1974) 137.Google Scholar
- 18.K. Matusita and S. Sakka, Phys. Chem. Glass, 20 (1979) 81.Google Scholar
- 20.H. E. Kissinger, Anal. Chem., 29 (1959) 1072.Google Scholar
- 21.T. Ozawa, Bull. Chem. Soc. Jpn., 35 (1956) 1881.Google Scholar
- 22.K. F. Kelton, Mater. Sci. Eng. A, 226–228 (1997) 142.Google Scholar