Effects of γ-Irradiation and Thermal Annealing on Photo-thermal-refractive Glass

doi:10.15541/jim20200389

Abstract

Abstract:

Photo-thermal-refractive (PTR) glass was irradiated with γ-ray at the total dose of 0.35, 1, 10 and 100 kGy, respectively, and then annealed. Irradiation mechanism of the photo-thermal-refractive glass was studied by absorption spectroscope, luminescence spectroscope and electron paramagnetic resonance. The results showed that the absorption of the γ-irradiated PTR glass in the visible light was mainly caused by the Ag⁰, silver molecular clusters Ag₂, Ag₃, silver nanoparticles Ag_m⁰, and non-bridge oxygen hole center HC₁ and HC₂. Under different doses of γ-ray irradiation, valence state of the ions (Ag⁺, Ce³⁺) in the glass matrix changed. At the same time, non-bridged oxygen bonds in the glass matrix broke, generating non-bridged oxygen hole defects HC₁, HC₂ and Ag⁰. With the increase of the radiation dose, silver molecular clusters Ag₂and Ag₃ generated, and the concentration of HC₂ center in the glass matrix increased, resulting in enhanced absorption near 639 nm. After being irradiated and annealed at 250 ℃, HC₁ and HC₂ defect centers was bleached. Silver molecules appeared after annealing at 430 ℃, of which absorption peak had a redshift and was broadened with the increase of annealing duration.

Key words: photo-thermal-refractive glass, γ-ray irradiation, defect center, UV-Vis absorption

CLC Number:

TQ174

ZHU Zhiyu, JIAO Yan, SHAO Chongyun, HE Dongbing, HU Lili. Effects of γ-Irradiation and Thermal Annealing on Photo-thermal-refractive Glass[J]. Journal of Inorganic Materials, 2021, 36(5): 521-526.

Figures/Tables 8

Fig. 1 Photos of PTR-glasses unirradiated and irradiated with 0.35, 1, 10 and 100 kGy γ-ray

Fig. 2 (a) Transmission spectra and (b) absorbance spectra of unirradiated PTR glass and PTR glass irradiated with 0.35, 1, 10, and 100 kGy γ-ray

Fig. 3 Emission spectra of PTR glass before and after being irradiated by 0.35, 1, 10, and 100 kGy γ-ray (Excitation wavelength: 340 nm)

Fig. 4 Gauss deconvolution of 0.35 kGy γ-radiation induced absorption (RIA)

Fig. 5 (a) Transmission spectra and (b) photos of PTR glass irradiated with 100 kGy γ-ray and thermal treatment at different temperatures for 30 min

Fig. 6 Absorbance spectra of PTR glass after 100 kGy γ-irradiation and thermal treatment at 430 ℃ for different time (a), TEM images of PTR glass after 100 kGy γ-irradiation and thermal treatment at 430 ℃ for 30 min (b) and 180 min (c)

Fig. 7 Absorption spectra of 100 kGy γ-ray irradiated PTR glass before and after thermal treatment at 430 ℃ for 30 min and 360 min

Fig. 8 EPR spectra of PTR glass irradiated with 1, 100 kGy γ-ray, and 100 kGy γ-irradiation and thermal treatment at 430 ℃ for 120 min (a), TEM images of PTR glass after 1 kGy (b) and 100 kGy (c) γ-irradiation

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