Abstract
Silico-phosphate glasses of Ca3/2PO4-SiO2 and NaCaPO4-SiO2 systems have been the topic of our studies. Microscopic and EDX investigations which have been carried out have shown that liquation occurs only in the case of glasses belonging to the NaCaPO4-SiO2 system. Additionally, it has been found that there are significant differences in the chemical compositions of the matrix and the inclusions. Based on the spectroscopic investigations it has been shown that the glasses of both series are characterized by complex domain composition and the structure of domains is close to that of the corresponding crystalline phase. Interpretation of the DTA results has been based on the knowledge of the texture and the structure of the materials studied. It has been found that liquation of the glasses is a multi-step process in which the matrix and the inclusions crystallize separately. Multi-step crystallization of the glasses belonging to the NaCaPO4-SiO2 system has been confirmed by the high temperature XRD investigations.
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Sitarz, M., Szumera, M. Crystallization of silico-phosphate glasses. J Therm Anal Calorim 91, 255–260 (2008). https://doi.org/10.1007/s10973-007-8374-3
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DOI: https://doi.org/10.1007/s10973-007-8374-3