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- W2017702919 abstract "It was found that paramagnetic defects, including E′ centers and oxygen hole centers, were created in high-purity silica glass during mechanical crushing in all test environments except water. The number of E′ and oxygen hole centers was proportional to the surface area of the powdered sample, but it was considered that the defects exist in a sub-surface layer. The combined defect center signal intensity appears to correlate with the surface energy of the glass during fracture. From the temperature dependence of the signal decay in air, the activation energy of the process was found to be ∼ 62 ± 3 kJ/mol. This suggests that water diffusion into the glass is the rate controlling process. The absence of any combined defect center signal in SiO2 glass crushed in water is attributed to the entry of water into the glass structure during fracture and the transformation of the E′ and oxygen hole defects to a non-paramagnetic state or form." @default.
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- W2017702919 date "1989-11-01" @default.
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- W2017702919 title "Defect formation in SiO2 glass during fracture" @default.
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- W2017702919 doi "https://doi.org/10.1016/0022-3093(89)90290-1" @default.
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