Glass properties/application

L. D. Pye and co-workers. Borate Glasses Structure, Properties, Applications, Vol. 12, Materials Science Research, Plenum Press, New York, 1978. 

Caution is needed in applying the results of general chemical tests for glass durability across a wide spectrum of glass properties. Glass fibre strengths, for example, are sensitive to the physical, as well as the chemical, nature of the environment and should only be assessed by the direct strength measurements in conditions which closely approximate the final application situation . 

Other Uses, Not all of the possible applications of SAS have been discussed here. A number of other applications are listed in alphabetical order in Table X. In the future, precipitated silicas may be used to a considerable extent for low-temperature insulations (e.g., for refrigerators). A moisture-resistant film with added silica has outstanding heat resistance and does not need any fluorinated hydrocarbons. SAS will likely be used as raw materials for pure silica glass for applications with rigorous requirements. The purity and uniformity of such SAS will have a great influence on the final properties. New applications will undoubtedly follow. 

Glycidyl methacrylate copolymers Ethylene/butyl acrylate/maleic anhydride copolymers Styrene/ethylene-butylene/styrene block copolymer Poly(amide) (PA), MgO Silicone rubber and aminosilane Liquid crystalline polymers Improved impact strength Improved impact strength" Improved impact strength Improved electrical properties, in glass fiber applications" Improved mechanical properties" Viscosity reduction" ... 

Poly(amide) (PA), MgO Improved electrical properties, in glass fiber applications [45]... 

Abstract A wide variety of natural fibers can be applied as reinforcement or fillers in composites. Bast fibers, such as fiax and hemp, have a long history of cultivation and use. They are characterized by low weight and excellent range of mechanical properties. The properties of bast fibers are influenced by conditions of cultivation, retting, and processing. Pretreatment and surface modification of bast fibers is conducted for optimization of the interfacial characteristics between fiber and matrix as well as improvement of their mechanical properties. Application of bast fibers as reinforcement to replace the glass fibers to composite manufacture brings positive environmental benefits. 

In recent yeors, there has been an increasing interest in glass-ceramic applications where optical properties are key. A parallel but unrelated trend involves the use of glass-ceramics as dental and surgical prostheses. In the optical area, the most significant properties are in the near infrared range in combination with excellent transparency. Efficient broadband luminescence in crystallites is the basis of applications such as tunable lasers and optical amplifiers, both of which can be made in both bulk and fiber form as glass-ceramics. 

Table I shows physical and chemical properties of AZS products considered in this study for superstructure and glass contact applications (for example, breast walls, port arches, jambs, melter pavers, and fore hearth channels). It is clear that the bonded and vibro-cast refractories have lower bulk density, higher apparent porosity, lower thermal conductivity and lower thermal expansion, when compared with the fused-cast refractories. These differences exist despite similar chemistry, for example zirconia content in the range 25-34 weight %.

Smith GP (1967) Photochromie glasses properties and applications. J Mater Sci 2 139-152... 

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