Addition of Alumina to Nanoporous Calcium Titanium Phosphate Glass-Ceramics and its Effects on Crystallization Behavior

Document Type : Original Research Article


1 Department of Materials Engineering, Faculty of Engineering, Malayer University, Malayer, Iran

2 Department of Materials Engineering, Faculty of Mechanical Engineering, University of Tabriz, Tabriz, Iran


Microporous Calcium Titanium Phosphate glass-ceramics have many uses in high-tech industries. For example, they have applications in catalysts industry. In this study, different molar percentages of alumina were added to a glass with P2O5 30, CaO 45, TiO2 25 (mol%) composition. The samples were melted at 1350°C and crystallization heat treatment was performed on the glasses after cooling to make glass-ceramics. The Differential Thermal Analysis (DTA) was used to determine nucleation and crystallization temperature. The DTA curve of the sample had 4 molar% and alumina had the sharpest crystallization peak. The CP and CTP phases were the most crystalline phases in all samples. The soluble CP phase disappeared and the porous structure of the CPT crystals remained through the acid washing of the samples. The results showed that the addition of alumina decreased the crystallization temperature, time and temperature of crystallization, and also increased the average size of porosities (from 12 to 16 nm).


Main Subjects

1.     Daiko, Y., Yajima, H., Kasuga, T., "Preparation of porous titanium phosphate glass-ceramics for NH3 gas adsorption with self-cleaning ability", Journal of the European Ceramic
Society, Vol. 28, No. 1, (2008), 267–270.
2.     Kasuga, T., Kimata, T., Obata, A.,, "Preparation of a Calcium Titanium Phosphate Glass–Ceramic with Improved Chemical Durability", Journal of the American Ceramic Society, Vol. 92, No. 8, (2009), 1709–1712.
3.     Kasuga, T., Hosono, H., Abe, Y., "Biocomposite Materials for Biotechnology", In Biomaterials and Tissue Engineering, Springer, Berlin, Heidelberg, (2004), 163-194.
4.     Aso, I., Nakao, M., Yamazoe, N., Seiyama, T., "Study of metal oxide catalysts in the olefin oxidation from their reduction behavior: I. Reduction of various metal oxides with propylene", Journal of Catalysts, Vol. 57, No. 2, (1979), 287–295.
5.     Goharian, P., Yekta, B. E., Aghaei, A. R., Banijamali, S., "Lithium ion-conducting glass-ceramics in the system Li2O–TiO2–P2O5–Cr2O3–SiO2", Journal of Non-Crystalline Solids, Vol. 409, (2015), 120–125.
6.     Hosono, H., Zhang, Z., Abe, Y., "Porous Glass-Ceramic in the CaO–TiO2–P2O5 System", Journal of the American Ceramic Society, Vol. 79, No. 2, (1989), 1587–1590.
7.     Hosono, H., Abe, Y., "Porous glass-ceramics composed of a titanium phosphate crystal skeleton: A review", Journal of Non-Crystalline Solids, Vol. 190,No. 3, (1995), 185–197.
8.     Hosono, H., Sakai, Y., Abe, Y., "Pore size control in porous glass-ceramics with skeleton of NASICON-type crystal CaTi4(PO4)6", Journal of non-crystalline solids, Vol. 139, (1992), 90–92.
9.     Soleimani, F., Rezvani, M., "The effects of CeO2 addition on crystallization behavior and pore size in microporous calcium titanium phosphate glass ceramics", Materials Resarch Bulletin, Vol. 47, No. 6, (2012), 1362–1367.
10.   Hosono, H., Abe, Y., "Porous Glass-Ceramics with a Skeleton of the Fast-Lithium-Conducting Crystal Li1+xTi2-xAlx(PO4)3", Journal of the American Ceramic Society, Vol. 75, No. 10, (1992), 2862–2864.
11.   Strnad, Z., "Glass-ceramic Materials: Liquid Phase Separation, Nucleation, and Crystallization in Glasses", Science Publishers, P. O. Box 211, 1000 AE Amsterdam, The Netherlands, (1986).
12.   Ray, C. S., Fang, X., Day, D. E.,, "New Method for Determining the Nucleation and Crystal-Growth Rates in Glasses", Journal of the American Ceramic Society, Vol. 83, No. 4, (2000), 865–872,
13.   Liu, H., Yang, R., Wang, Y., Liu, S.,,"Influence of Alumina Additions on the Physical and Chemical Properties of Lithium-iron-phosphate Glasses, Physics Procedia, Vol. 48, (2013), 17–22.
14.   Brow, R. K., "Nature of Alumina in Phosphate Glass: I, Properties of Sodium Aluminophosphate Glass", Journal of the American Ceramic Society, Vol. 76, No. 4, (1993), 913–918.
15.   Soleimani, F., Rezvani, M., "Determination of the Nucleation and Crystallization Parameters for Making Nanoporous Titanium Phosphate Glass-ceramics", Advanced Ceramics Progress, Vol. 3, No. 3, (2017), 26–31.