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Oxyfluoride glasses with the mol% compositions (63-x) SiO2, x Al2O3, 12.3 CaO, 5.3 K2O, 9.0 Na2O and 10.4 CaF2 with x = (10, 8, 6) were doped with an Er3+-concentration of 1·1020 cm−3. The glasses were thermally treated at temperatures in the range from 550 to 620 °C. This led to the crystallization of cubic CaF2 with extremely broadened XRD-lines caused by mean crystallite sizes ranging from 14 to...
Glasses of different matrix (phosphate, borate, silicate and lead-silicate) were studied for their optical properties. The effect of Er dopant on transmittance and luminescence properties was presented. The significant “red shift” and “blue shift” of UV edge absorption were discussed based on the changes in the framework of the borate and phosphate glasses, respectively. It was showed that the integral...
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