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Glass
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Definition: Any rigid noncrystalline solid. The term is applied more commonly to noncrystalline inorganic oxides than to noncrystalline polymers. An inorganic product of fusion which has cooled to a rigid condition without crystallizing. Glass is typically hard, relatively brittle, and has a conchoidal fracture. The compositions of A-glass, C-glass, and E-glass fibers, all of which are used as composite reinforcement materials, are given below:

Glass
"A""C""E"
SiO272.064.654.3
Al2O30.64.114.8
Fe2O3——0.4
CaO10.013.417.3
MgO2.53.34.7
Na2O14.27.90.6
K2O—1.7—
B2O3—4.78.0
BaO—0.9—
F2—Tr.0.1
SO30.7——

Definition Copyright ©1989 CRC Press LLC. All rights reserved.

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