Compositional effects on the optical and thermal properties of potassium aluminophosphate glasses

被引:17
|
作者
Lee, ETY [1 ]
Taylor, ERM [1 ]
机构
[1] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England
基金
英国工程与自然科学研究理事会;
关键词
athermal; thermal expansion coefficient; thermo-optic coefficient; phosphate glasses;
D O I
10.1016/j.optmat.2004.02.029
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The K2O-Al2O3-P2O5 glass system has been examined and various compositions have been melted. Their optical and thermal properties have been measured to assess their potential for athermalisation. The addition of alumina (Al2O3) increases the refractive index (n) and glass transition temperature (T-g) and decreases the thermal expansion coefficient (alpha), consequently leading to positive thermo-optic coefficient (dn/dT). In addition to thermal expansion, polarisability of the glass also affects dn/dT. Generally, glasses must exhibit negative dn/dT to counter thermal expansion, in order to have potential application in athermalisation. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:323 / 330
页数:8
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