Abstract
Er 3+ doped aluminophosphate glasses with various Na 2O/Li 2O ratios were prepared at 1250 °C using a silica crucible to study mixed alkali effect (MAE). The effect of relative alkali content on glass transition temperature, crystallization temperature and thermal stability were investigated using differential scanning calorimetry (DSC). In addition, apparent activation energies for crystallization, E c, were determined employing the Kissinger equation. The effect of Al 2O 3 content on the magnitude of MAE was also discussed. No mixed-alkali effect is observed on crystallization temperature.
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