Abstract

Different concentrations of NdF 3, PrF 3, and PrF 3, codoped with YbF 3, ranging from 0.25 to 2.0 wt%, have been added to an AlF 3-base glass with composition (mol%) 30.2AlF 3–10.6BaF 2–20.2CaF 2–8.3YF 3–3.5MgF 2–3.8NaF–13.2SrF 2–10.2ZrF 4. The Avrami exponent, n, and activation energy, E, for the base glass, as well as the doped glasses, have been calculated by analyzing the differential scanning calorimetry curves, according to the amended Ozawa–Chen and Augis and Benett equations. In light of these results, we observe that the introduction of suitable amounts of rare-earth ions improved the thermal stability of the base glass.

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