PETIT, Laëtitia; RICHARDSON, Kathleen; CAMPBELL, B.; ORVEILLON, Glenn; CARDINAL, Thierry; GUILLEN, François; LABRUGÈRE, Christine; VINATIER, Philippe; COUZI, Michel; LI, W.; SEAL, S.

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PETIT, Laëtitia
The College of Optics and Photonics [Orlando] [CREOL]

RICHARDSON, Kathleen
The College of Optics and Photonics [Orlando] [CREOL]

CAMPBELL, B.
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Ce document a été publié dans

Physics and Chemistry of Glasses - European Journal of Glass Science and Technology Part B. 2004, vol. 45, n° 6, p. 315-321

Society of Glass Technology

Résumé en anglais

The effect of oxygen substitution for sulphur has been investigated in germanium and boron based glasses con-taining heavy metal oxides (Sb2O3). After heat treat-ment under H2S flow, the colour of the glass (powder and bulk) changes from colourless to yellowish indica-tive of anion exchange. The oxygen substitution for sul-phur has been confirmed by the presence of a new Raman band located at 340 cm-1 corresponding to a Ge–S and Sb–S bond vibration. The influence of the borate addition has been studied. XPS measurements have shown (i) the oxidation of Sb3+ to Sb5+ during the melting which increases with an increase of boron content and (ii) the reduction of Sb5+ to Sb3+ during the sulphination, resulting in the departure of more than one oxygen anion upon replacement by one sulphur and in the absence of weight gain. It has been clearly dem-onstrated that sulphination near the oxide glass tran-sition temperature can lead to the formation of oxysulphide glass materials.< Réduire

Mots clés en anglais

Glass transition temperature

Heat treatment

Redox reaction

Glasses

Physical properties

Sulphination

Antimony boron germanate

Oxysulfide

Origine

Importé de hal

Unités de recherche

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB) - UMR 5026