Quantitative Assessment Of The Homogenisation Of Fluoride Glass Melts By Bubbling

In contrast to oxide glasses, the high denisty and fluidity of heavy metal fluoride glasses leads to very efficient convective mixing of the melt. However, these very convections can also lead to striae. Subjective assessment of the glass is not sensitive to regularly distributed variations in the refractive index. Results are reported in this paper of the effect of homogenisation by bubbling and the quantiative measurement of homogeneity by the Christiansen-Shelyubskii method.