Crystallization of fluorindate and fluorogallate glasses

Abstract

Crystallization of binary InF₃MF₂ and GaF₃MF₂ (where M  Ba, Sr and Ca) glasses was studied. Characteristic temperatures and kinetic parameters E (activation energy) and n (Avrami exponent) were obtained. Stability against devitrification is discussed in terms of the above cited parameters and also of some others parameters proposed in literature. Optical properties (IR and upconversion emissions) are reported in different crystallized samples containing Nd³⁺. The main observation is that up conversion emission presents an enhanced sensibility to crystallization when compared to conventional emission.