Formation and Properties of Chalcogenide Glasses in the GeSe2–As2Se3–CdSe System |
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| Authors: | Zhao Donghui Xia Fang Chen Guorong Zhang Xianghua Ma Hongli J L Adam |
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| Affiliation: | Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, 200237 Shanghai, China; Laboratoire des Verres et Céramiques, Universite de Rennes I, 35042 Rennes cedex, France |
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| Abstract: | The glass-forming region in a GeSe2–As2Se3–CdSe system and the dependence of properties on glass compositions as a formula of 70GeSe2–(30? x )As2Se3– x CdSe ( x =0–25) were investigated. Measurements included density, micro-hardness, differential scanning calorimetry (DSC), X-ray diffraction, and IR transmission spectra. A large glass-forming region was shown while addition of Cd increases the crystallization trend of the system. Besides, the Cd content accommodated by the system to form glass is found to be lower in the As2Se3-rich region than in the GeSe2-rich region. With the introduction of CdSe, density, micro-hardness, and T g of glasses increase whereas an exothermal peak in the DSC curve appears and thermal stability (Δ T ) decreases. The activation energy of crystallization and the Avrami exponent were also obtained using the modified Ozawa equation. |
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