The tellurium bromide glasses: New I.R. transmitting materials

A new class of glasses has been discovered in the binary system TeBr. The limits of the vitreous domain are Te 2Br and TeBr. The composition Te 3Br 2 is the most stable toward crystallization and the addition of S or Se decreases strongly the devitrification rate. The glass temperatures are in the...

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Bibliographic Details
Published in:Materials research bulletin 1988, Vol.23 (1), p.59-64
Main Authors: Zhang, Xiang Hua, Fonteneau, Gilles, Lucas, Jacques
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Chemical industry and chemicals
Exact sciences and technology
Glasses
Special glasses
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Summary:A new class of glasses has been discovered in the binary system TeBr. The limits of the vitreous domain are Te 2Br and TeBr. The composition Te 3Br 2 is the most stable toward crystallization and the addition of S or Se decreases strongly the devitrification rate. The glass temperatures are in the range 70–80° C and, in the case of Se doped glasses, there is no crystallization peak. The optical transmission range lies from 1.9 μm to 20 μm for Te 3Br 2 glass and makes it potential candidate for low loss fiber at 10.6 μm, a loss as low as 10 −2 dB/km is estimated at this wavelength from the multiphonon contribution.
ISSN:0025-5408
1873-4227
DOI:10.1016/0025-5408(88)90225-5