Tungstate, molybdate, vanadate base glasses

Details Tungstate, molybdate, vanadate base glasses Tungstate, molybdate, vanadate base glasses

C - Chemistry, Metallurgy

03

C

C03C 3/12 (2006.01) C03C 3/17 (2006.01) C03C 3/21 (2006.01) C03C 4/00 (2006.01) C03C 13/04 (2006.01) H01S 3/17 (2006.01)

Patent

CA 2396961

Alkali tungstate, molybdate and vanadate glasses, and telecommunications components embodying such glasses, the compositions of the glasses consisting essentially of 15-70 mol percent of at least one oxide selected from the group consisting of WO3, MoO3 and VO2.5, 0-35 % CrO3, 0-15 % UO3, the total WO3 plus MoO3 plus VO2.5 plus CrO3 plus UO3 being 50-70 %, 20-50 % R2O where R represents at least two elements selected from the group consisting of Li, Na, K, Rb, Cs, Ag and Tl, and optionally containing 0-10 % MO where M is selected from the groups of elements consisting of Ca, Ba, Sr, Mg, Cd, Pb, 0-5 % X2O3 where x is at least one element selected from the group consisting of Al, Ga, In and Bi, 0-5 % of at least one transition metal oxide, 0-15 % P2O5 and/or TeO2 and 0-5 % of a rare earth oxide selected from the lanthanide series.

La présente invention concerne des verres alcalins à base de tungstate, molybdate et vanadate, ainsi que des éléments de télécommunication comprenant des verres de ce type. La composition des verres consiste essentiellement en : 15-70 % molaires d'au moins un oxyde choisi parmi le groupe comprenant WO¿3?, MoO¿3? et VO¿2,5? ; 0-35 % de CrO¿3? ; 0-15 % de UO¿3?, le total de WO¿3? plus MoO¿3? plus VO¿2,5? plus CrO¿3? plus UO¿3? valant 50-70 % ; 20-50 % de R¿2?O où R représente au moins deux éléments choisis parmi le groupe comprenant Li, Na, K, Rb, Cs, Ag et Tl ; et contenant éventuellement 0-10 % de MO où M est choisi parmi les groupes comprenant Ca, Ba, Sr, Mg, Cd, Pb ; 0-5 % X¿2?O¿3? où x représente au moins un élément choisi parmi le groupe comprenant Al, Ga, In et Bi ; 0-5 % d'au moins un oxyde de métal de transition ; 0-15 % de P¿2?O¿5? et/ou de TeO¿2? ; et 0-5 % d'un oxyde de terre rare choisi parmi la série des lanthanides.

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