Abstract
Phosphate glasses with high solubility of rare‐earth ions, low glass transition temperature (Tg), and excellent optical transmission are suitable materials for laser hosts. In this study, a new type of Er2O3‐doped SnO–P2O5 glass with Er2O3 content of 0–8 mol% has been obtained. It was found that physical properties, thermal properties, and crystallization behavior of the glass exhibit discontinuities at Er2O3 content of 2–4 mol%. It was also noted that reheating the glass at 375°C, which is higher than the dilatometric softening temperature, results in the crystallization of a tin phosphate phase from the glass surface when Er2O3 content is ≤0.5 mol%, resulting in serious cracking of the glass. Adding more Er2O3 (1–8 mol%) totally suppresses the surface crystallization, and thus is helpful to glass‐shaping processes.
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