VITREOUS COMPOSITIONS OF THE VITROCERAMIC TYPE, TRANSPARENT TO INFRARED

摘要

The invention relates to vitreous compositions, in particular of the vitroceramic type, transparent to infrared, production and uses thereof. Said compositions comprise in mol. %: Ge 5-40, Ga <1, S + Se 40-85, Sb + As 4-40, MX 2-25, Ln 0-6, adjuncts 0-30, where M = at least one alkaline metal, selected from Rb, Cs, Na, K and Zn, X = at least one atom of chlorine, bromine or iodine, Ln = at least one rare earth and adjunct = at least one additive comprising at least one metal and/or at least one metal salt with the sum of all molar percentages of the components present in said composition being 100.