Crystallization kinetics of a soda lime silica glass with TiO2 addition
S.M. de la Parra–Arciniega, A. Álvarez–Méndez, L.C. Torres–González, and E.M. Sánchez*
Universidad Autónoma de Nuevo León, Av. Pedro de Alba s/n, Cd. Universitaria, San Nicolás de Los Garza, N.L. 66400 México.
* Corresponding author:
Tel.: +52 81 83 29 40 10 ext. 6242; ]]>
fax: +52 81 83 76 53 75,
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Recibido el 8 de septiembre de 2008
Aceptado el 9 de enero de 2009
Abstract
Studies conducted into Na2O–CaO–3SiO2 glass composition suggest that its phase transformation occurs from the surface towards the interior of the sample. In a study carried out in 1982, it was reported that no addition of nucleating agents modified the mechanism. Taking advantage of the disposition materials synthesized by nanotechnology, in this study TiO2 in nanometer size was used with the idea that, because of its qualities, it could modify the crystallization mechanism. The glasses obtained as well as the thermally treated samples, were evaluated by the X–ray diffraction (XRD) powder method, differential thermal analysis (DTA), and by optical microscopy and high resolution transmission electron microscopy (HRTEM). Within the range of TiO2 concentration studied (0 – 10 wt %), 10 wt % of TiO2 considerably reduced the Na2O–2CaO–3SiO2 phase crystallization process. The crystallization mechanism was not modified and TiO2 did not form compounds with the matrix components.
Keywords: Glass; crystallization; XRD; DTA; microscopy.
]]> Resumen
Estudios realizados en el sistema vítreo Na2O–CaO–3SiO2 sugieren que su transformación de fase ocurre desde su superficie hacia su interior. En estudios previos realizados se reportó la modificación del mecanismo de cristalización por adición de agentes nucleantes. En este estudio partículas nanometricas de TiO2 fueron adicionadas con la idea de modificar el mecanismo de cristalización. Los vidrios obtenidos así como muestras tratadas térmicamente fueron evaluadas por difracción de rayos–X, análisis térmico diferencial, microscopía óptica y de transmisión electrónica de alta resolución. El rango de estudio realizado fue de 0–10 % en peso y se encontró que en la máxima adición se disminuyó considerablemente el proceso de cristalización. A pesar de la rápida disolución lograda por la adición de nanopartículas de titania no se logró un cambio del proceso de cristalización.
Descriptores: Vidrio calizo; cristalización; difracción de rayos–X; análisis térmico diferencial; microscopía.
PACS: 81.05.Kf; 81.05.Pj; 81.10.Jt
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Acknowledgements
The authors gratefully acknowledge financial support from NSF–CONACyT (35998U), SEP–CONACyT (60170) and PAICyT–UANL programs. EMS acknowledges fellowship support from CONACyT (74528).
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1. Lee, Jinn–Shing, Hsu, and Chung–King, Thermochim. Acta 333 (1999) 115. [ Links ]
2. Shyu, Jyh.–Jiin, and Wu Jenn–Ming, J. Mater. Sci. Lett. 10 (1991) 1056. [ Links ]
3. Z. Strnad and R.W. Douglas, Phys. Chem. Glasses 14 (1973) 33. [ Links ]
4. S. Saiello, F. Branda, A. Buri, and A. Marotta, Verres Réfract. 36 (1982) 859. [ Links ]
5. N. Koga, J. Sestak, and Z. Strnad, Thermochim. Acta 203 (1992) 361. [ Links ]
6. C.S. Ray and D.E. Day, Thermochim. Acta, 280/281 (1996) 163. [ Links ]
7. Strnad and Zdenek, Glass–Ceramic Materials (1986) 72. [ Links ]
8. Duan, Ren–Guan, Liang, Kai–Ming, and Gu Shou–Ren, J. European Ceramic Society 18 (1998) 1729. [ Links ]
9. T. Ozawa, Kinetics of non–isothermal crystallization. Polymer 12 (1971) 150. [ Links ]
10. K. Matusita and S. Sakka, J. Non–Cryst. Solids 38 (1980) 741. [ Links ]
11. Hsi, Chi–Shiung, Wang, and Moo–Chin, J. Mater. Res. 13 (1998) 2655. [ Links ]
12. Lee, Jinn–Shing., Hsu, and Chung–King, Thermochim. Acta 333 (1999) 115. [ Links ]
13. Lederer, Kay., Deckwerth, M. Rüssel, and Christian, J. Non–cryst. Solids 224 (1998) 103. [ Links ]
14. Fisher et al., J. Non–Cryst. Solids. 351 (2005) 623. [ Links ]
15. P.W. McMillan, Glass–Ceramics, Second Edition. (Academic Press, Great Britain, 1979) p. 14. [ Links ]
16. Wakasugi, Takashi, Ota, and Rikuo, J. Non–Cryst. Solids 274 (2000) 175. [ Links ]
17. K. Matusita, S. Sakka, and Y. Matsui, J. Mater. Sci. 10 (1975) 961. [ Links ]
18. Weinberg and C. Michael, J. Non–Cryst. Solids 167 (1984) 81. [ Links ]
19. M.M. Wakkad, J. Thermal Analysis and Calorimetry 63 (2001) 533. [ Links ]
20. C.S. Ray and D.E. Day, Nucleation and crystallization in liquids and glasses (1993) 207. [ Links ]
21. N. Lahl, K. Singh, L. Singheiser, K. Hilpert, and D. Bahadur, J. Mater. Sci. 35 (2000) 3089. [ Links ]
22. P. Alizadeh and V.K. Marghussian, J. Eur. Ceram. Soc. 20 (2000) 775. [ Links ]
23. Yi Hu and C.L. Huang, J. Non–Cryst. Solids. 278 (2000) 170. [ Links ]
24. X.J. Xu, C.S. Ray, and D.E. Day, J. Am. Ceram. Soc. 74 (1991) 909. [ Links ] ]]>