Influence of free volumes on functional properties of modified chalcogenide glasses and oxide ceramics

Abstract : Influences of inner free-volume structure on the functional properties of chalcogenide GeSe2-Ga2Se3 and GeS2-Ga2S3-CsCl glasses as well as oxide Cu0.4Co0.4Ni0.4Mn1.8O4 and MgO-Al2O3 ceramics caused by their modification are investigated. It was shown that crystallization process in 80GeSe2-20Ga2Se3 glasses annealed at 380 °C for 25 and 50 h indicating specific free-volume fragmentation as well as decreasing of transmittance and shifts of optical transmission edge in a long-wave side. It is established that CsCl additions in GeS2-Ga2S3 glasses result in void agglomeration and shift of the absorption edge toward shorter wavelengths. In Cu0.1Ni0.8Co0.2Mn1.9O4 ceramics with 8% of NiO phase addition, positron trapping sites near grain boundaries are formed. It is shown that water vapor modifies defects located near grain boundaries in MgO-Al2O3 ceramics sintered at 1300 °C, the process being accompanied by void fragmentation at water adsorption with further void agglomeration at water desorption after drying. These ceramics are humidity sensitive in the region from 30% to 98% of RH. © Springer International Publishing AG 2017.
Type de document :
Communication dans un congrès
Fesenko O., Yatsenko L. (eds). 4th International Conference Nanotechnology and Nanomaterials, NANO 2016, Aug 2016, Lviv, Ukraine. Springer, Springer Proceedings in Physics, 195, 2017, Nanophysics, Nanomaterials, Interface Studies, and Applications. NANO 2016. 〈10.1007/978-3-319-56422-7_36〉
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https://hal-univ-rennes1.archives-ouvertes.fr/hal-01619418
Contributeur : Laurent Jonchère <>
Soumis le : jeudi 19 octobre 2017 - 13:40:04
Dernière modification le : samedi 24 mars 2018 - 01:35:34

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H. Klym, O. Shpotyuk, A. Ingram, L. Calvez, I. Hadzaman, et al.. Influence of free volumes on functional properties of modified chalcogenide glasses and oxide ceramics. Fesenko O., Yatsenko L. (eds). 4th International Conference Nanotechnology and Nanomaterials, NANO 2016, Aug 2016, Lviv, Ukraine. Springer, Springer Proceedings in Physics, 195, 2017, Nanophysics, Nanomaterials, Interface Studies, and Applications. NANO 2016. 〈10.1007/978-3-319-56422-7_36〉. 〈hal-01619418〉

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