By I. Fanderlik
By way of chemical composition, silica glass is the best amorphous substance that has been commercially used in many fields of software in a few business branches, because of its physico-chemical homes. the current quantity provides a complete evaluation at the newest advancements in glass know-how. The impression of genetic kinds of uncooked fabrics at the number of melting know-how is mentioned. part ameliorations of quartz-silica glass and the effect of the impurities of melting furnaces and furnace fabric is tested. The quartz uncooked fabrics compatible for the manufacture of transparent, opaque and artificial silica glasses, a number of production methods, the physico-chemical homes of silica glasses and their usage in technological perform are reviewed intimately. The booklet presents a wealth of exact info at the homes and use of silica glass on the way to be of substantial curiosity to staff within the glass undefined, together with these in examine and improvement, in addition to to humans within the fields of electronics, electric engineering, verbal exchange know-how, optics and the chemical, energy engineering and metallurgical industries
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Additional info for Silica Glass and its Application
1 Density characteristics Determination of the density characteristics is a very appropriate physical method used in the testing of quartz. The density of a mineral, measured with adequate accuracy, provides a good picture of both the micro- and macro-defects in its struc ture. Study of the Ural quartzes  showed that their density could be regarded as constant, to the level o f ± l - 1 0 _ 1 k g m " 3 . 9 Precise determination of density is very difficult, due especially to the demanding preparation and selection of defect-free grains.
In addition to this type, use is currently made of hydrothermal milk white quartz from the deposits at Aktas, Gora Chrustalnaya and others. Extra-pure silica glasses are made from either crystals or synthetic crystalline quartzes (also from synthetic silicon compounds). Very pure milk white quartzes occur in the Orehovo-Bitola region of Macedonia and provide high-grade silica glass. The quartz veins also comprise large amounts of muscovite, which necessitates a special process for dressing the quartz raw material.
Even the central parts of the vein rarely contain shreds of rocks. These impurities are generally quite noticeable and readily eliminated by dressing. However, the higher content of Ti0 2 in phyllites, connected with the presence of leucoxene, is awkward. Even if dressing succeeds in eliminating most of the surrounding rock components (leaching out of sericite and chlorite), the leucoxene remains almost intact in the product of dressing. The main problem of the dressing technology is therefore to reduce the leucoxene content to the required level.
Silica Glass and its Application by I. Fanderlik