Defects in glasses

W. Kem, Wet-chemical etching of SiC>2 and PSG films, and an etching-induced defect in glass-passivated integrated circuits, RCA Rev. 47, 186, 1986. 

Defects in glasses can include vacancies, interstitials, dangling bonds, over coordinated atoms, uncoordinated atoms, etc. See, for example, D.L. Griscom, Defect strucmre of glasses, J. Non Crys tall. Solids 73, 51 (1985). 

Ganchev, S. 1.. Carriveau. G.. and Qaddoumi, N. (1994), Microwave detection of defects in glass reinforced polymer composites. Proc. of the SPIE, Advanced Microwave and Millimeter-wave Detectors Conf.. Vol. 2275, pp. 11-20. 

Glass devitrification Formation of crystals (seeds) in a glass melt, usually occurring when the melt is too cold. These crystals can appear as defects in glass fibers. 

Understanding atomic bonding helps us understand the structures of crystals and glass. When we think of crystals, we think of atoms arranged in a perfect way. We traditionally think in terms of crystal defects, but we will also consider how these ideas apply to defects in glass. 

A special feature here is that we have point defects (and large defects) in glass just as we do in crystals. Our challenge is to understand what determines the properties (e.g., diffusion) of such defects when we do not have a reference lattice. 

ASTM D2563 (2008) Practice for Classifying Visual Defects in Glass-Reinforced Plastic Laminate Parts. 

ASTM 2563 Classifying visual defects in glass-reinforced plastic laminate parts... 

Air Chain. A line of air bubbles, forming a defect in glass or vitreous enamel. 

Wave. An optical defect in glass caused by uneven glass distribution or by STRIAE (q.v.). 

Some Theoretical Considerations Related to Defects in Glass." Symposium on Defects in Glass, Tokyo-Kyoto, 129 (1966). "Theoretical Considerations," in Polymer Fractionation,... 

Seed (glass) A defect in glass due to a foreign particle. 

Defects in glass can result in new resonance frequencies or absorption bands, which facilitate two-photon absorption. Defects resulting in absorption bands in the VIS or UV spectrum are called colour centres. Such colour centres can also be generated by exposing glasses to X-ray or electron radiation, which results in the formation of a bonded electron-hole-couple (exciton) (e - -h+). The generation of various colour centres in fused silica is described in the literature [138]. 

D. Ehrt, P. Ebeling, U. Natura, Redox equilibria and Ultraviolet radiation induced defects in glasses. Proc. Int. Congr. Glass, vol. 1, Edinburgh, Scotland, 1-6 July, 84 (2001)... 

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