210 articles – 1947 Notices  [english version]
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Journal of Non-Crystalline Solids 357, 3 (2011) 932-938
Durability of an As2S3 chalcogenide glass: Optical properties and dissolution kinetics
Yi-Fan Niu1, 2, Jean-Pierre Guin1, Abdesselam Abdelouas3, Tanguy Rouxel1, Johann Troles4
(01/02/2011)

The durability of a As2S3 chalcogenide glass composition was studied in de-ionized water at different temperatures (60-90 °C) for different periods of time, up to 120 days. The evolutions of the chemical composition and the pH of the solutions as well as the optical transmission of bulk samples, in the 2-10 μm region, were measured as a function of corrosion time. Atomic force microscopy and optical microscopy were used to investigate the roughness of corroded surfaces and the evolution of surface defects. The water corrosion of As2S3 glass was found to follow a congruent dissolution mechanism, a possible glass-water reaction mechanism was proposed. The optical transmission of the glass was found to be affected by the corrosion. The optical loss increased from 4 to 21% with corrosion time, this variation was attributed to the texturation of the surface by the reaction of corrosion. Moreover, the experimental results show that high temperature value enhances the corrosion reaction: an activation energy of 103 ± 2 kJ/mol was computed from experimental measurements.
1 :  LARMAUR - LAboratoire de Recherche en Mécanique Appliquée
2 :  Sino-European Institute of Aviation Engineering
3 :  SUBATECH - Laboratoire SUBATECH Nantes
4 :  ISCR - Institut des Sciences Chimiques de Rennes
Verres et Céramiques
Chimie/Matériaux
Durability – Chalcogenide glass – Dissolution – Corrosion behavior