الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 162 |  |  |
| | | from | 162 | | |
Abstract
The borosilicate glass is the most common industrial solution host barrier used for the immobilization of low-level wastes for its excellent chemical durability and for its resistance to heat. The borosilicate glass samples were prepared in a muffle furnace at temperature 1300° C, glass samples were then annealed in a furnace at 400° C.
In this study, the durability of borosilicate glass was tested in many leaching solutions such as acidic HCl, alkali solution such as NaOH and ground water. The results show that borosilicate glass of the composition prepared from 37.5% slag – 37.5% cement dust – 25% B2O3 is the most durable glass in acidic solution and the borosilicate glass of the composition 37.5% Cullet – 37.5% cement dust – 25% B2O3 is the most corroded glass in acidic solution. The durability is also studied after subjecting the glass samples to different irradiation doses of γ- ray or by using different heat treatment temperature ranges. Also the corrosion of glasses after being heat treated at the temperature ranges at (500-750oC) were evaluated. The durability of the glasses after heat treatment shows that all glass samples become more durable.
The infrared spectra of all the glasses after corrosion either before or after irradiation or heat treatment were recorded in the range from (4000-400) cm-1 in an attempt to study their structure systematically. The DTA analysis was made for the glass samples and the data show that the crystallization cannot be occur as revealed by the absence of any exothermic peaks in the DTA patterns. Also the X-ray diffraction indicated that no crystalline phases have been formed.
The densities of all the glass samples before and after heat treatment or after being exposed to different gamma-irradiation doses were measured and the data indicate a slight decrease with irradiation. The concentration percentage of the ions present on the glass surface was determined by Energy Dispersive X-ray analysis (EDX). The results of the mechanical properties (Stress and modulus) for the investigated glasses either before and after the irradiation or before and after heat treatment have been measured or evaluated.