Defect centres in beryllium oxide ceramics studied by electron paramagnetic resonance (EPR)

Milsch, B.; Kerbe, Friedmar; Michalowsky, L.

doi:10.1016/0272-8842(90)90045-h

Cited by 4 publications

(1 citation statement)

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“…Radiation defects in beryllium oxide irradiated by gamma-rays depending on irradiation dose rate and pretreatment temperature were investigated using an electron paramagnetic resonance (EPR) method widely used to study free radicals in various paramagnetic centers formed in the material during the action of ionizing radiation [23,24]. Before irradiation, beryllium oxide was subjected to several hours of thermal-vacuum treatment.…”

Section: Characterizationmentioning

confidence: 99%

Radiation-stimulated adsorption processes on the surface of beryllium oxide

et al. 2022

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The paper presents the study results of photo and gamma radiation effect on the beryllium oxide (BeO) surface properties. Photoadsorption studies of О2 on BeO by the methods of infrared (IR) spectroscopy and manometry with a change in the temperature of preliminary annealing from 473 to 1073 K show that samples subjected to preliminary training at 473 K are most active. The maximum of adsorption activity on g-irradiated beryllium oxide is observed on the samples annealed at 673 K before the irradiation. The maximum of paramagnetic centers (PMCs) is also observed on samples annealed at this temperature. Comparison of electron paramagnetic resonance (EPR) and adsorption studies shows that absorption of H2 and O2 leads to the destruction of paramagnetic centers. It is assumed that, upon irradiation, adsorption centers with electron and hole modes are formed on the surface of BeO.

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Section: Characterizationmentioning

confidence: 99%