Glass, inorganic diffusion

Many inorganic solids lend themselves to study by PL, to probe their intrinsic properties and to look at impurities and defects. Such materials include alkali-halides, semiconductors, crystalline ceramics, and glasses. In opaque materials PL is particularly surface sensitive, being restricted by the optical penetration depth and carrier diffusion length to a region of 0.05 to several pm beneath the surface. 

Kimmich and coworkers have studied the magnetic relaxation dispersion of liquids adsorbed on or contained in microporous inorganic materials such as glasses and packed silica (34-43) and analyze the relaxation dispersion data using Levy walk statistics for surface diffusion to build... 

Although some inorganic membranes such as porous glass and dense palladium membranes have been commercially available for some time, the recent escalated commercial activities of inorganic membranes can be attributed to the availability of large-scale ceramic membranes of consistent quality. As indicated in Chapter 2, commercialization of alumina and zirconia membranes mostly has been the technical and marketing extensions of the development activities in gas diffusion membranes for the nuclear industry. 

Glass is a mainly inorganic molten product, which after a Strong increase in viscosity upon cooling solidifies without crystallization. Glasses exhibit a diffuse X-ray diffraction pattern, unlike crystals, since the typical long range order of... 

It has been reported that inorganic mercury is lost from acidified aqueous solutions (20, 21) and that elemental mercury can be lost by diffusion through the walls of polyethylene containers (22). During the Projects study, 100-ng/g solutions of mercury (as diphenylmercury) in oils were stable for at least 3.5 months in containers of polypropylene, Teflon, soft glass, and Pyrex glass (23). The stability of "rear samples to be analyzed for mercury is uncertain since the native mercury compounds in petroleum are unknown. 

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