Thermo-mechanical and optical properties of calcium aluminosilicate glasses doped with Er3+ and Yb3+

In this work a series of Er2O3 and Yb2O3 doped and Er2O3-Yb2O3 co-doped low silica calcium aluminosilicate glasses have been melted at 1470 degrees C under vacuum conditions. Measurements of optical absorption coefficient, ma ss density, refractive index, Vickers micro-hardness, glass transformation temperature (T-g) and crystallization temperature (T-x) have been carried o ut. The results showed that these glasses dissolved similar to 1.5 mol% Er2 O3 and similar to 1.1 mol% Yb2O3 in their structure without devitrification and also that only small changes (similar to 10%) have been measured in th eir thermal, mechanical and optical properties. (C) 2000 Elsevier Science B .V. All rights reserved.