A dilatometric study of phase separation in sodium borosilicate glass with phosphorus and fluorine additions
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- 作者：1. Grebenshchikov Institute of Silicate Chemistry ; Russian Academy of Sciences ; nab. Admirala Makarova 2 ; St. Petersburg ; 199034 Russia
- 关键词：Na2O ; B2O3 ; SiO2 system – ; F and P additions – ; phase separation – ; two ; phase glasses – ; glass transition temperature
- 刊名：Glass Physics and Chemistry
- 出版时间：June 2011
- 出版年：2011
- 期刊代码：23_03605043
- 类别：mat
- 卷：37
- 期：3
- 页码：290-292
- 数据来源：sp
摘要
The phase separation of sodium borosilicate glass with small additions of phosphorus and fluorine oxides has been investigated using dilatometry at a temperature of 550掳C (the heat treatment time varies from 0.05 to 500 h). Two glass transition temperatures have been revealed in the dilatometric curves at heat treatment times of 65 h and more. The results indicate that the time of 65 h is enough to complete the phase separation in the glass at a temperature of 550掳C.