Abstract
Tin(II) organosilicophosphate glasses were prepared by nonaqueous acid–base reactions using orthophosphoric acid, dimethyldichlorosilane, and tin(II)chloride as the starting materials. The structure of the methylsiloxane-phosphate copolymer (methylsilicophosphate) and tin(II) methylsilicophosphate glasses was mainly investigated by the 31P nuclear magnetic resonance technique. A chain structure composed of the–(P–O–Si–O)m–silicophosphate bonds was found as the main structural unit in the methylsilicophosphate prepared by mixing orthophosphoric acid and dimethyldichlorosilane at room temperature. Tin(II) methylsilicophosphate glasses could be prepared by introducing SnCl2 as a cross-linking agent of silicophosphate chains. By increasing the reaction temperature, it was possible to promote the reaction and then to increase the network dimensions of the resultant tin(II) methylsilicophosphate glasses. It was found that the glasses with a high degree of condensation tend to have a better water durability in a humid atmosphere.
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Mizuno, M., Takahashi, M. & Yoko, T. Structure and water durability of tin(II) organosilicophosphate glasses prepared by nonaqueous acid–base reactions. Journal of Materials Research 21, 1798–1806 (2006). https://doi.org/10.1557/jmr.2006.0223
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DOI: https://doi.org/10.1557/jmr.2006.0223