Transparent phosphosilicate glasses containing crystals formed during cooling of melts

S. J. Liu, Yanfei Zhang, W. He, Yuanzheng Yue

Research output: Contribution to journalJournal articleResearchpeer-review

17 Citations (Scopus)

Abstract

The effect of P2O5-SiO2 substitution on spontaneous crystallization of SiO2-Al2O3-P2O5- Na2O-MgO melts during cooling was studied by X-ray diffraction (XRD), differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and rotation viscometry. Results show that addition of P2O5 leads to amorphous phase separation (APS), i.e., phosphate- and silicate-rich phases. It is due to the tendency of Mg2+ to form [MgO4] linking with [SiO4]. Molar substitution of P2O5 for SiO2 enhances the network polymerization of silicate-rich phase in the melts, and thereby the spontaneous crystallization of cubic Na2MgSiO4 is also enhanced during cooling of the melts. In addition, the sizes of the local crystalline and separated glassy domains are smaller than the wavelength of the visible light, and this leads to the transparency of the obtained glasses containing crystals.
Original languageEnglish
JournalJournal of Non-Crystalline Solids
Volume357
Issue number24
Pages (from-to)3897-3900
Number of pages4
ISSN0022-3093
DOIs
Publication statusPublished - 2011

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