Stress build-up in glass by ultra-violet irradiation

Oôka, Kazuo; Kishii, Toru

doi:10.1016/0022-3093(70)90004-9

Cited by 10 publications

(1 citation statement)

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“…Furthermore, ionizing radiation, fluxes of neutrons, protons, deutrons, etc, cause stress in glass and often lead to cracking or fracture Shill 1970, Primak andEdwards 1962). The process of stress build-up in borate glasses probably involves Kishii 1968, Ooka andShill 1970): (1) translation of alkali ions caused by elongation of =B-0 bonds; (2) rotation of BO, or BO, groups caused by twisting or change of the bond angle; and (3) formation of new B-0-B bonds between two BO, triangles by elongation, charge transfer or photoionization of =B-0 unit. These processes should lead to structural changes in gamma irradiated borate glasses.…”

Section: Resultsmentioning

confidence: 99%

Effect of gamma radiation and thermal treatment on some physical properties of ZnO-PbO-B₂O₃glasses

Doweidar

Zeid

El-Damrawy

1991

J. Phys. D: Appl. Phys.

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The microhardness Hv of xZnO.(50-x)PbO.50B2O3 glasses has been studied as a function of ZnO content and gamma dose. Hv shows a maximum at about 15 mol.% ZnO. 11B NMR suggests the formation of non-bridging oxygen ions in the borate network as ZnO is added in the PbO.B2O3 glass. Both the density and the molar volume decrease with the increase of ZnO. Irradiation with gamma rays lowers the microhardness, whereas heat treatment causes its increase. Infrared investigations indicate that radiation induced defects can activate phase separation processes when the irradiated glass is heat treated.

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Section: Resultsmentioning

confidence: 99%