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Titolo:
Influence of vapor-phase reaction on the reduction of OH- and S-H absorption bands in GeS2-based glasses for infrared optics
Autore:
Liu, XB; Tikhomirov, V; Jha, A;
Indirizzi:
Univ Leeds, Dept Mat, Leeds LS2 9JT, W Yorkshire, England Univ Leeds Leeds W Yorkshire England LS2 9JT S2 9JT, W Yorkshire, England
Titolo Testata:
JOURNAL OF MATERIALS RESEARCH
fascicolo: 12, volume: 15, anno: 2000,
pagine: 2864 - 2874
SICI:
0884-2914(200012)15:12<2864:IOVROT>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
--discip_EC--
Citazioni:
14
Recensione:
Indirizzi per estratti:
Indirizzo: Jha, A Univ Leeds, Dept Mat, Clarendon Rd, Leeds LS2 9JT, W Yorkshire, England Univ Leeds Clarendon Rd Leeds W Yorkshire England LS2 9JT , England
Citazione:
X.B. Liu et al., "Influence of vapor-phase reaction on the reduction of OH- and S-H absorption bands in GeS2-based glasses for infrared optics", J MATER RES, 15(12), 2000, pp. 2864-2874

Abstract

The reduction of OH- and S-H absorption bands in unary and ternary germanium sulphide glasses with glasses was studied via the chemical reaction of H-2 and HCl gases at high temperatures. Multicomponent phase equilibria calculations in the Ge-S-H-O-X (X = Cl, I) system were performed to determine the equilibrium partial pressures of gaseous species for removing oxygen andhydrogen from the glasses used for infrared (IR) applications. The effect of carbon on the reduction in oxide and hydroxide absorption bands was alsoinvestigated. The absorption characterization was carried out using a Fourier transform infrared reflection spectrophotometer. The IR absorption bands between 1000 and 3700 cm(-1) were identified and analyzed. The Boson peaks (BP) in glass samples with two different OH- concentrations were also analyzed. It was found that the presence of OH- enhanced the intensity of Boson peaks. The sites for OH- and shared oxygen with the main [GeS4](4-) tetrahedron structural units in the glass are discussed with respect to the BP and IR absorption analyses. The structure model also identifies the origin of the reduced Rare-earth (RE+3) ion solubility (in particular Pr3+ ions) and its dependence on OH- ion concentrations in GeS2, glasses.

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Documento generato il 04/12/20 alle ore 01:32:15