Improvement of BaO:B 2O 3:Fly ash glasses: Radiation shielding, physical and optical properties
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Author list: Tuscharoen S., Kaewkhao J., Limkitjaroenporn P., Limsuwan P., Chewpraditkul W.
Publisher: Elsevier
Publication year: 2012
Journal: Annals of Nuclear Energy (0306-4549)
Volume number: 49
Start page: 109
End page: 113
Number of pages: 5
ISSN: 0306-4549
Languages: English-Great Britain (EN-GB)
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Abstract
Rice husk ash glass (RHA-glass) of composition xBaO:(80 - x)B 2O 3:20RHA where x = 45, 50, 55, 60, 65 and 70 wt.% have been prepared using melt-quenching method and investigated on their optical, physical and gamma-rays shielding properties. The densities of these glass samples were increased with increasing of BaO content, due to higher molecular weight of BaO comparing with B 2O 3. The molar volume of these glasses was increased with increasing content of BaO; BaO acts as modifier to increase the loose packing. The visible light transmission of RHA glass was better than SiO 2 glass prepared in same formula and preparing condition. The experimental values of gamma ray shielding properties such as; mass attenuation coefficients, atomic cross sections and effective atomic numbers, were found in good agreement with the theoretical values as calculated from WinXCom. Moreover the glass system at all BaO concentrations, exhibited the better half values layer in comparison window and ordinary concrete. ฉ 2012 Elsevier Ltd. All rights reserved.
Keywords
Borosilicate glasses, Gamma-ray shielding, Mass attenuation coefficient
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