Crystallization behavior of glass-ceramic system45Li2O-xTiO2-(55-x)P2O5

Crystallization behavior of different composition of the Li2O-TiO2-P2O5 glass system that is used as a solid electrolyte was investigated. The glass composition was changed according to 45Li2O-xTiO2- (55-x) P2O5 in which x could adopted 10،15،20،25، respectively. The glasses were melted at 1350 °C and then casted into preheated graphite mold. Heat treatment of glasses was done at theirs Differential Thermal Anaalysis crystallization peak temperatures. According to X-ray diffraction and microstructural analysis، nasicon was crystallized in the glass that contained 25 mole percent TiO2. Moreover، the results indicate that surface crystallization is the dominant mechanism for crystallization and a two-step heat treatment process is required for precipitation of nasicon as a sole crystalline phase.