A process of converting a material into a glass-like amorphous solid which is free of any crystalline structure, either by the quick removal or addition of heat, or by mixing with an additive
The process of immobilizing waste by converting it into a high strength glass or glass-like substance The process can treat excavated waste or soil in situ Commonly used to treat radioactive material, and soil contaminated with volatile organics and metals
Stage of firing beginning at 800 C (1472 F ) when the soda and potash within the body start to flux the free silica The body shrinks during vitrification Vitrification strengthens the final product by welding the particle size together with glass (mullite) crystals) The furthest stage to which a body can be taken without deformation
The process, induced by exposure to high heat, by which a material such as a clay or a glaze, melts and fuses together, thereby becoming solid and glass-like This is what happens to ceramics and glazes during the firing process, and what converts a form made of soluble materials into an insoluble and permanent piece of ceramics See also firing, glaze
the process by which waste is transformed from a liquid or sludge into an immobile solid that traps radionuclides and prevents waste from contaminating soil, ground water and surface water (BEMR, June 1996, pg GL-10)
A process that stabilizes nuclear waste by mixing it with molten glass The glass is poured into metal canisters, where it hardens into logs The Department of Energy has built plants for vitrifying high-level-waste at West Valley, New York, and the Savannah River Site
The incorporation of high-level wastes into borosilicate glass, to make up about 14% of it by mass It is designed to immobilise radionuclides in an insoluble matrix ready for disposal
The formation of glass or a glass-like material, usually by heating to a high temperature Vitrification is an important step in the sintering of most commercial ceramics On heating, a small proportion of the ceramic material melts to form a highly viscous liquid, which draws the ceramic particles together during sintering On cooling, the viscous phase transforms into a glass, which binds the ceramic together
is the fusion of a clay body during firing The temperature at which this occurs varies for every clay Vitrification at desired temperatures is necessary so the clay body will develop to the proper point of hardness at the same temperature that the glaze used melts to form a glassy coating over the ware Once vitrified, clay is no longer recycleable, although it may be used as grog
The process of making glass In the context of plutonium and nuclear waste management, it means the mixing of a material with molten glass in order to render it immobile, safe for storage, and not easily usable for weapons
Vitrification is the process of converting materials into a glass-like substance, typically through a thermal process Radionuclides and other inorganics are chemically bonded in the glass matrix Consequently vitrified materials generally perform very well in leach tests EPA has specified, under the land disposal restrictions, vitrification to be the treatment technology for high-level waste (55 FR 22627, June 1, 1990)
(of ceramics) having the surface made shiny and nonporous by fusing a vitreous solution to it; "glazed pottery"; "glassy porcelain"; "hard vitreous china used for plumbing fixtures"