Investigation on Composition, Cooling Conditions and Melting Crucible in the System of CaO-P2O5-TiO2 Glass Ceramic

In this research, according to phosphate glass uses in the CaO-P2O5-TiO2 system, several compositions were prepared. Effect of melting crucible, melting time and cooling condition were investigated. FT-IR and XRD were utilized for structural analyzing. Glass transition and crystallization temperature were determined according to DTA trace of optimized glass. Microsructure and phase separation of glass were investigated by SEM. Alumina crucible was good for melting. Melting temperature and time were reported 1350 °C and 1 h, respectively. The best ratio of Ca3(PO4)6 / CaTi4(PO4)6 was between 2-2.16 for optimized glass. Cooling in “the mold with high cooling rate” was suitable. Glass transition and crystallization temperature were determined 680 °C and 833 °C, respectively.