Abstract
The crystallization of glasses in the Na2O-Nb2O5-SiO2 system in the temperature range 690–750°C is investigated by measuring the material density and X-ray powder diffraction analysis. It is found that the kinetics of precipitation of the NaNbO3 crystalline phase can be described by the Avrami equation with the Avrami exponentn ≈ 1. The model describing the crystallization kinetics is proposed. The crystallization of amorphous inhomogeneity regions, which are formed as a result of phase separation, is considered in the model. The consideration refers to the crystallization process governed by the nucleation of crystals in these regions. The calculated Avrami exponents are close to unity. The proposed model does not contradict the available data on the X-ray small-angle scattering that have been obtained upon crystallization of the samples and qualitatively explains a nonmonotonic variation in the material transparency during crystallization.
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References
Hirayama, Ch. and Berg, D., Dielectric Properties of Glasses in Na2O-Nb2O5-SiO2 System,J. Am. Ceram. Soc., 1963, vol. 46, no. 2, pp. 85–88.
Layton, M.M. and Herzog, A., Nucleation and Crystallization of NaNbO3 from Glasses of Na2O-Nb2O5-SiO2 System,J. Am. Ceram. Soc., 1967, vol. 50, no. 7, pp. 369–374.
Borrelli, N.F., Herzog, A., and Maurer, R.D., Electrooptic Effect of Microcrystals in Glass Matrix,Appl. Phys. Lett., 1965, vol. 7, no. 5, pp. 117–118.
Karapetyan, G.O., Korolev, Yu.G., Maksimov, L.V., and Nemilov, S.V., Physicochemical Features of Niobate Glasses with Electrooptical Properties,Fix, Khim. Stekla, 1986, vol. 12, no. 5, pp. 598–601.
Golubkov, V.V., Zhilin, A.A., Redin, A.V., Chuvaeva, T.I., and Shepilov, M.P., Regularities of Processes of Phase Separation and Crystallization in R2O-Nb2O5-SiO2 Systems at the Forming of Transparent Glass-Ceramics, inProc. Conference “Fundamentals of Glass Science and Technology,” Vaxjo, Sweden, 1997, pp. 372–379.
Christian, J.W.,The Theory of Transformations in Metals and Alloys: Part 1. Equilibrium and General Kinetic Theory, Oxford (UK): Pergamon, 1975. Translated under the titleTeoriya prevrashchenii vmetallakh i splavakh. Chast’l, Moscow: Mir, 1978.
Andreev, N.S., Porai-Koshits, E.A., and Mazurin, O.V., Methods of Studying Metastable Phase Separation, inPhase Separation in Glass, Porai-Koshits, E.A. and Mazurin, O.V., Eds., Amsterdam: Elsevier, 1984, pp. 67–101.
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Zhilin, A.A., Chuvaeva, T.I. & Shepilov, M.P. Crystallization kinetics of sodium-niobium silicate glasses. Glass Phys Chem 26, 20–26 (2000). https://doi.org/10.1007/BF02731939
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DOI: https://doi.org/10.1007/BF02731939