研究了不同Al2O3、Na2O、La2O3、Y2O3及AlF3含量的磷酸盐铒玻璃的物理化学性质和光谱性质,通过恒温水浴失重测试的方法探讨了玻璃组分Al2O3、Na2O、La2O3、Y2O3及AlF3对磷酸盐玻璃化学稳定性的影响.结果表明,Al2O3含量增加,玻璃化学稳定性提高,添加少量的AlF3会降低玻璃的化学稳定性,与La2O3相比Y2O3对提高玻璃的热稳定性有益.通过对比不同组分玻璃样品的热性质、机械性质以及析晶、光谱性质的结果,初步得出了一个比较适于离子交换过程的磷酸盐铒玻璃成分.
Five kinds of erbium doped phosphate glass samples named WM1～WM5 with different contents of
Al2O3, Na2O, La2O3, Y2O3 and AlF3 were prepared, and their chemical durability, thermal, mechanical and spectroscopic properties
were investigated. The chemical durability of these glasses was tested by immerging the samples in boiling water. The results obtained show that
the glass with Al2O3 content of 9.8wt% has the best chemical durability and has the highest Knoop hardness, higher glass transition temperature and lower thermal
expansion coefficient. Al2O3 greatly improves the chemical durability of phosphate glass. AlF3 deteriorates the chemical
durability of the glasses a little. For improving thermal stability, Y2O3 is better than La2O3. The spectral properties of Er3+ in these glasses
were evaluated by measuring their absorption and emission spectra and fluorescence lifetime. The glass with 9.8wt% Al2O3 has the largest
absorption cross section for both Yb3+ and Er{3+ ions. Based on chemical durability, thermal, mechanical and spectral properties, WM1 glass
, containing 9.8 wt% Al2O3 and 6.9 wt% Na2O, is the best candidate for ion exchange processing.
参考文献
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