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Controllability study of crystallization on whole visible-transparent chalcogenide glasses of GeS2-Ga2S3-CsCl system

C. LIN1,2, L. CALVEZ2, B. BUREAU2, Y. LEDEMI2, Y. XU2, H. TAO1, X. ZHANG2, X. ZHAO1

Affiliation

  1. Key Laboratory of Silicate Materials Science and Engineering (Wuhan University of Technology), Ministry of Education, Wuhan, Hubei 430070, PR China
  2. Laboratoire des Verres et Céramiques, UMR-CNRS 6226, Sciences chimiques de Rennes, Université de Rennes 1, 35042 Rennes Cedex, France

Abstract

Phase transformation and nucleation-rate-like curve were firstly determined in chalcogenide glasses based on GeS2-Ga2S3-CsCl system, offering a controlled way to the transparent glass-ceramics with designed-in crystal phases and desired microstructure. The whole visible transparent glass of a composition of 25GeS2·35Ga2S3·40CsCl was specified for a demonstration of the controlled crystallization. The expected crystal phases (Ga2S3 crystals) with a very fine size of ~50 nm were achieved successfully, more impressively with a large crystallinity degree of > 80%. An IR-transmitting glass-ceramic with the well improved resistance to the environmental impact was also obtained after a heat-treatment at 350 o C for 30h. And the nonlinear evolution of the thermo-mechanical properties for the resultant glass-ceramics is elucidated by the structural investigation employing SEM, XRD, and NMR techniques. The corresponding results would have benefit for the optimization of designing transparent chalcogenide glass-ceramics with highly specialized properties for many potential new applications in IR spectral region..

Keywords

Mechanical Properties, Crystallization, Phase Transformations, Chalcogenide glasses, Nucleation rate.

Submitted at: June 6, 2010
Accepted at: Aug. 12, 2010

Citation

C. LIN, L. CALVEZ, B. BUREAU, Y. LEDEMI, Y. XU, H. TAO, X. ZHANG, X. ZHAO, Controllability study of crystallization on whole visible-transparent chalcogenide glasses of GeS2-Ga2S3-CsCl system, Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 8, pp. 1684-1691 (2010)