Novel Na-Li-SiAlPON glasses prepared by melt synthesis using AlN
- 作者：Abdessamad Kidari ; abdessamad.kidari@gmail.com ; abde.kidari@ul.ie ; Michael. J. Pomeroy ; Stuart Hampshire
- 关键词：Glass ; Oxynitride ; Alkali oxides ; Spectroscopy ; Thermal properties
- 刊名：Journal of the European Ceramic Society
- 出版年：2012
- 期刊代码：53_09552219
- 类别：ms
- 出版时间：June, 2012
- 卷：32
- 期：7
- 页码：1389-1394
- 文件大小：308 K
摘要
Amorphous alumino-silicophosphate materials containing up to 1.70 wt.%nitrogen have been successfully prepared by aluminium nitride solution in Na-Li-Si-Al-P-O melts at 850 掳C thus preventing phosphorus volatilisation. Although the solubility limit for nitrogen in these glasses was limited to 8.31 wt.%, the presence of nitrogen in the materials greatly increases their glass transition temperatures, suppresses the devitrification and has a significant effect on their melting behaviour. Comparative analysis of Raman spectra for the oxide and oxynitride glasses shows the substitution of P-O-P linkages by PN-P linkages while tri-coordinated nitrogen bridges were not detected. The attendant increase in network connectivity arising from such a substitution is responsible for the increase in glass transition temperature when nitrogen substitutes for oxygen.