Coloration of Ce-doped Multicomponent Silicate Glasses by Electron Irradiation

doi:10.15541/jim20140016

Abstract

Abstract:

The coloration of Ce-doped multicomponent silicate glass (type K509) irradiated by 10 MeV electrons was investigated by absorption spectra, electron paramagnetic resonance and photoluminescence spectra. The results show that non-bridging oxygen hole centers (HC1 and HC2) are induced in K509 glasses after electron irradiation, leading to significant degradation of visible transmission. The concentration of color center grows in an exponential law with the increase of radiation dose at the same dose rate, and decreases in exponential decay law with radiation dose rate at the same total dose. According to photoluminescence spectra, the concentration of Ce³⁺ ions has a negative correlation with radiation dose, and has a positive correlation with dose rate, which proves the mechanism of radiation-hardness in cerium-doped glasses. Ce³⁺ ions capturing holes induced by electron irradiation to form Ce⁴⁺ inhibits the formation of hole trapped color centers, HC1 and HC2, which avoids additional absorption in visible light range. The energy level diagram of Ce³⁺ in K509 glasses is also obtained by Gaussian resolution of the broad asymmetric emission spectra of Ce³⁺.

Key words: radiation-hard glass, cerium ions, electron irradiation, color center, kinetics

CLC Number:

TB321

FU Xin-Jie, SONG Li-Xin, LI Jia-Cheng. Coloration of Ce-doped Multicomponent Silicate Glasses by Electron Irradiation[J]. Journal of Inorganic Materials, 2014, 29(10): 1018-1022.

Figures/Tables 9

Fig. 1 Induced absorption spectra of K509 glass after being irradiated with different doses (dose rate: 1 kGy/s)

Fig. 2 Integrated absorption area in visible band as a function of dose (dose rate: 1 kGy/s)

Fig. 3 EPR spectra of K509 glass after being irradiated by electron radiation (dose: 1000 kGy)

Fig. 4 Excitation and emission spectra of K509 glasses after being irradiated with different doses (dose rate: 1 kGy/s)

Fig. 5 Gaussian fitting of emission spectra of K509 glasses (dose: 1000 kGy)

Fig. 6 Energy level diagram of Ce3+ in K509 glass

Fig. 7 Induced absorption spectra of K509 glasses after being irradiated at different dose rates (dose: 1000 kGy)

Fig. 8 Integrated absorption area in visible band as a function of dose rate (dose: 1000 kGy)

Fig. 9 Excitation and emission spectra of K509 glasses after being irradiated at different dose rates (dose: 1000 kGy)

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