Gamma Ray Irradiation Effects on the Mechanical and Chemical Properties of CuO–Bi<sub>2</sub>O<sub>3</sub>–SiO<sub>2</sub> Glasses

Abstract

Abstract:The effect of gamma radiation on the mechanical and chemical properties of x CuO, (70-x) Bi 2 O 3 , 20SiO 2 ,10 Na 2 O, where 0 ≤ x ≤ 30 weight % were carefully studied in order to obtain information about the changes that appear in the structure of the glass matrix with the doping of copper ions. The glass matrix was fabricated by melt-quenching technique. The results showed that, the glass system has good durability, density and mechanical properties with increasing CuO content at the expense of Bi 2 O 3 , and that the effect of irradiation with gamma dose is very small. UV-VIS absorption spectra for all glasses have a single asymmetric band, which corresponds to a BiO 3 →BiO 6 transition of the Cu 2+ ions in octahedral symmetry with an elongated tetragonal distortion. These measurements indicate the presence of Cu 2+ ions in the glasses. Furthermore, it has good water resistance ability with increasing copper oxide. So, it can be used as a container for keeping radioactive waste and radioactive sources.

Influence of La-impurities and plasma treatment on the structural and optical properties of some bismuth calcium borate glasses

“…The Vickers micro-hardness values HV were calculated for all studied samples, before and after the plasma treatment, according to the previous standard formula [22][23][24][25]; where F is the indentation load and d is the diagonal length impression, as seen in figure ( 4). It's clear that the incorporation of La-impurities acted to increase the glass hardness (resistance to elastic deformations) as a result to the strength of the atomic bonds in the glass structure induced by dopants [26][27][28][29]. On the other side, the plasma treatment causes the hardness of each sample to increase to twice its value before treatment, which may due to a relaxation process as a result of the plasma energies…”

Influence of La-impurities and Plasma Treatment on the Structural and Optical Properties of Some Bismuth Calcium Borate Glasses

“…The Vickers micro-hardness values HV were calculated for all studied samples, before and after the plasma treatment, according to the previous standard formula [22][23][24][25]; where F is the indentation load and d is the diagonal length impression, as seen in figure (4). It's clear that the incorporation of La-impurities acted to increase the glass hardness (resistance to elastic deformations) as a result to the strength of the atomic bonds in the glass structure induced by dopants [26][27][28][29]. On the other side, the plasma treatment causes the hardness of each sample to increase to twice its value before treatment, which may due to a relaxation process as a result of the plasma energies…”