Base glass production

Glass fibres present a particular problem. The water resistance of the base glass can of course the measured by a grain test, but this is unlikely to be representative of the performance of the final product. Generally, purely empirical methods are used to test the glass fibres in situ in a composite... 

Silica analysis of water, 26 39 Silica-based glass fibers fabrication of, 77 136-137 transparency of, 77 132 Silica brick, ASTM classifications and specifications for, 27 509 Silica components, production of, 23 56 Silica fibers... 

Deposition of thin films is used to change the surface properties of the base material, the substrate. For example, optical properties such as transmission or reflection of lenses and other glass products, can be adjusted by applying suitable coating layer systems. Metal coatings on plastic web produce conductive coatings for film capacitors. Polymer layers on metals enhance the corrosion resistance of the substrate. 

Chemical-Based Materials Safety Glass Products Plastic Products... 

A typical extraction sequence is similar to the traditional SPE, although 500 pL of the appropriate solvent is sufficient for disk conditioning and extraction of the analytes. Several types of disk extraction media are commercially available in different dimensions depending on the application and sample volume. The most prevalent are paper-based, membrane-based, glass fiber-based, and PTFE-based products. Commercially available products are Speediscs by Baker, Empore by 3M, Novo Clean by Alltech, and SPEC by Ansys Technol. 

Based on Cs glass products leached in deionized water at 25°C. 

About 8.5% of glass containers used in 1986 wa recycled [11], Since only about 20% of all silica-based glass goes into other products (flat glass, fiba glass, etc.), the 8.5% figure is rather impressive. Most recyclers request (and most municipalities that recycle require) that glass be separated into clear and colored portions. 

Water plasticized the food models and caused a substantial decrease of the glass-transition temperature. The Gordon-Taylor equation was successfully fitted to experimental glass transition temperatures of the three model systems, as shown in Figure 53.2b. The constant, k, for the Gordon-Taylor equation was found to be 7.6 0.8 for lactose/reactant systems, 7.2 0.7 for lactose/trehalose/reactant systems, and 7.9 0.9 for trehalose/reactant systems. The three model systems had corresponding glass-transition behaviors, which were typical of lactose-based dairy products. The critical water contents at 23°C obtained from Tg data for lactose/reactant, lactose/trehalose/reactant, and trehalose/reactant systems were 7.0, 7.4, and 7.1 g/100 g of dry solids, respectively. 

In principle, any glass can be converted to a glass-ceramic by finding a suitable nucleation agent and the appropriate heat treatment. In practice, a number of technical factors (among which is the production of the base glass) limit the choice. 

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