Browsing by Author "Abd Elaziz T.D."

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    Effect of gamma radiation on some optical and electrical properties of lithium bismuth silicate glasses
    (Springer New York LLC, 2019) Abou Hussein E.M.; Abd Elaziz T.D.; El-Alaily N.A.; Radiation Chemistry Department; National Center for Radiation Research and Technology; Atomic Energy Authority; P. O. Box 8029; Nasr City; Cairo 11371; Egypt; Chemistry Department; Foundation Academy for Sciences and Technology (FAST); Batterjee Medical College (BMC); Jeddah; Saudi Arabia; October University for Modern Sciences and Arts (MSA); 6th of October City; Egypt
    Lithium bismuth silicate glasses with the composition of; 68% SiO2, 20% Bi2O3, 8% Li2O3, 4% Na2O doped with either 2% PbO, BaO or SrO (all in wt%) were studied to investigate some of their optical and electrical properties before and after different doses of gamma radiation. Density, oxygen packing density OPD, molar and specific volumes, optical UV absorption, optical energy gap, electrical conductivity and dielectric measurements were measured and discussed in this study regarding the effect of gamma radiation. The results showed that all glasses were more affected at the higher radiation dose (100�kGy) than the lower radiation dose (50�kGy) because of the creation of more defects and non- bridging oxygens NBOs at the higher dose. In spite of that, Pb2+ ions containing glass revealed better properties to resist gamma radiation than glasses containing either Ba2+ or Sr2+ ions because of its highly compacted structure and the low concentration of NBOs, defects or vacancies as well as the high polarizability of Pb2+ ions that plays an effective role in enhancing the glass optical and electrical properties. � 2019, Springer Science+Business Media, LLC, part of Springer Nature.
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    Vitrified municipal waste as a host form for high-level nuclear waste
    (2014) El-Alaily N.A.; Abou-Hussein E.M.; Abdel-Monem Y.K.; Abd Elaziz T.D.; Ezz-Eldin F.M.; National Center for Radiation Research and Technology; P.O. Box 29; Nasr City; Cairo 11765; Egypt; Faculty of Science; El-Mounofia University; El-Mounofia; Egypt; October University for Modern Sciences and Arts (MSA); 6th October City; Egypt
    Preparing glass to be used as a radioactive waste immobilizer from municipal waste is the aim of this paper. Up to 90 wt% of municipal waste was obtained by burning the raw waste at 700 C for 5 h; this were successfully vitrified into borosilicate and sodium borate glasses at ~1,200 C. The long term behavior of such glass is one of the most important factors, which is determined by their durability in aqueous solution. Experimental durability data of the prepared glass immersed in ground water together with ?-irradiation was found to be affected according to the different irradiation doses. In addition, thermal analysis and glass surface morphology were investigated. The evolution of the damage on the studied properties was correlated to the changes in the glass network depending on their composition and irradiation dose. The results showed that glass matrix containing higher amount of municipal waste possess high durability and low thermal expansion after being gamma irradiated. The results showed that glass containing higher amount of municipal waste possess high durability and low thermal expansion after irradiation. 2013 Akad miai Kiad, Budapest, Hungary.