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标题：STUDY OF THE INFLUENCE OF NA/K ALKALI MOLAR RATIO ON THE PROPERTIES OF A GLASSY MATERIAL FOR NUCLEAR WASTE DISPOSAL
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作者：Dalila Moudir ; Rafika Souag ; Nour Kamel 等
期刊名称：Fresenius Environmental Bulletin
印刷版ISSN：1018-4619
出版年度：2017
卷号：26
期号：1A
页码：913-918
语种：English
出版社：PSP Publishing
摘要：The effect of alkali mixture ratio is known to delay the structural evolution of the network, especially in glasses dedicated for nuclear waste storage. In this work, we synthesize an aluminosilicate glass in a Si-Al-Na-Li system, with a batch method of oxides double melting at 1450 °C. The effect of [Na2〇]/([Na2〇]+[K2〇]) molar ratio on the glass network variation was investigated in the range of 0.20 to 0.95.For the whole of the studied chemical compositions, both X-ray diffraction and scanning electron microscopy analyses reveal a pure amorphous structure, and Fourier Transform Infrared Spectroscopy gave representative spectra of the studied glasses main bounds. Almost, the evolution of many properties as a function of the molar ratio [Na2〇]/([Na2〇]+[K2〇]) have been investigates. The Archimedes density varies in the range 2530-2578 kg/m3, and the molar volume in the range 22.87-23.71 10-6 m3/mol. The differential thermal analysis shows that the glass transition temperature is higher than 723 K, for the whole of studied compositions. The mechanical characterization gave suitable properties with Vickers indentations ranging from 685.13 to 786.70 Hv and Young modulus in the interval 0.13-5.01 GPa. Also, the glasses electrical resistivity is maximum for the equimolar ratio [Na2〇]/([Na2〇]+[K2〇]) = 0.50.
关键词：Nuclear Glass;confinement;Nuclear waste;XRD;DTA;Young modulus.