Observation of Wormlike and Droplet Phase Separation on the Crystallization of Lio-Mgo-Alo-Sio Glass-Ceramics
SSRN, ISSN: 1556-5068
2024
- 128Usage
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Article Description
LO-MgO-AlO-SiO (LMAS) glass-ceramics have been widely studied for their excellent thermal expansion coefficient and thermal shock resistance. As a nucleation agent, the effect of P2O5 concentration on phase separation and crystallization in LMAS glasses still needs to be fully understood. Here, the effects of different PO concentrations on the phase separation, glass structure, microstructure and crystallization behavior of LMAS glasses are studied. The results indicate that the morphology of the phosphate phases transforms from wormlike to droplet with the increase of PO concentration. The glass appearances undergo a noticeable alteration, shifting from transparent to white and opaque. The MAS NMR results show that the PO improves the connectivity degree of glass network. The different types of phase separation produced by different P2O5 concentrations significantly affect the crystallization behavior. The wormlike phases have no promotion effect on crystallization, while the droplet phases promote crystallization.
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