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• W2256717948 abstract "The purpose of the research in this paper is to produce a radiation shielding glass by recycling glass of cathode ray tubes (CRTs) which come from used computers and TV sets and adding some heavy metal oxides as lead oxide (PbO) to increase the density, and using some other oxides such as potassium oxide (K2O) as a modifier for the resulted glass. Because of, the glass of cathode ray tubes (CRTs) contains some heavy oxides where the part Funnel contains about 20 % of lead oxide (PbO) while the part Panel contains about 10 % of barium oxide (BaO) and the same percent for strontium oxide (SrO). So, these glass can be used as a radiation shielding glass for nuclear and radiation applications. In this paper, the glass of cathode ray tubes (CRTs) have been used as powdered glass to make new samples with lead oxide (PbO) and potassium oxide (K2O). Then, the optical and radiation properties of these samples have been investigated. The effects of 1 % added of cerium oxide (CeO2) on the radiation resistant and optical spectra differences have been measured. In addition, this research has environmental benefits that appear in reducing the toxic heavy metals that included in CRT glass such as lead, barium, strontium and other metals. This paper discuses a new a approach to recycle the CRT glass. Many samples of glass have been prepared by using the powdered glass of CRT and lead oxide (PbO) as lead material in these mixtures to increase density. Also the potassium oxide (K2O) has been added to some mixtures as a modifier oxide for decreasing melting temperatures and improving optical and technical characteristics of these glass samples. As a result, same samples had high density about 5.38 g.cm3. The glass transition temperatures (Tg) and the structure of these samples have been investigated by using the differential temperature analysis (DTA) and X-Ray diffraction (XRD) respectively. The optical transmission spectra have been studied, and the transmission studied by using UV-Visible spectrometer and the optical transmission reached to about 85 % in the visible spectrum range. Then, attenuation coeffcients have been measured for photons emitted by Co60:After that, the optical transmission before and after irradiation have been investigated. The results appeared that these spectra varying by radiation doses and related to the type of used glass in these samples. Where the transmission decreased about 20 % to 50 % in the beginning of the spectrum range from 400 nm to 600 nm at exposure doses that reached to 5 kGy and high dose rate 1 kGy/h. These spectra were not varying in some samples that contain the glass panel. These results agree with similar studies where the density reached to 5.2 g.cm3 and the refractive index equal to 1.8, and the value of transmission closed to 85 %. In addition, the decreases of transmission spectra also the same when it exposure to radiation doses." @default.
• W2256717948 created "2016-06-24" @default.
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• W2256717948 date "2016-02-01" @default.
• W2256717948 modified "2023-09-22" @default.
• W2256717948 title "Studying The Physical Optical and Radiation Shielding Properties of Radiation Shielding Glass Made of Glass of Cathode Ray Tubes and Heavy Metal Oxides" @default.
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