Microstructural evolution of sol-gel-derived phosphosilicate gel with heat treatment

descriptionPublicationkeyboard_double_arrow_right Article 01 May 1994 English Publisher:Springer Science and Business Media LLCJournal:Journal of Materials Science, volume 29, pages 2,531-2,535 (issn: 0022-2461, eissn: 1573-4803,

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Authors: Y. S. Kim; R. E. Tressler;

doi: 10.1007/bf00363451

Microstructural evolution of sol-gel-derived phosphosilicate gel with heat treatment

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Abstract

The microstructure of phosphosilicate gel prepared by a sol-gel process was investigated as a function of the heat-treatment temperature. Crystalline phases, Si3(PO4)4 and SiP2O7, were identified in the heat-treated phosphosilicate gel containing 56 mol% P2O5. It was found from the Fourier transform infrared spectra that phosphorus enters into the copolymer structure at ∼ 600 °C. The specific surface area of the gel increased with the heat-treatment temperature. An increase of the density of open pores with the heat-treatment temperature was observed in the secondary electron micrographs.

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