Gamma ray irradiation-induced variations in structure and optical properties of cerium/titanium-doped oxyfluoride transparent glass-ceramics

被引：4

作者：

Wang, Zhenlin ^{[1
]}

Cheng, Laifei ^{[2
]}

机构：

[1] Chongqing Univ Technol, Coll Mat Sci & Engn, Chongqing 400054, Peoples R China

[2] Northwestern Polytech Univ, Sci & Technol Thermostruct Composites Mat Lab, Xian 710072, Peoples R China

来源：

MATERIALS RESEARCH BULLETIN | 2017年 / 92卷

基金：

中国国家自然科学基金;

关键词：

Glasses; Microstructure; Optical properties; Radiation damage; Raman spectroscopy; SPECTROSCOPIC PROPERTIES; SILICATE-GLASSES; RAMAN; CRYSTALLIZATION; EVOLUTION; IR;

D O I：

10.1016/j.materresbull.2017.04.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

CeO2/TiO2-doped oxyfluoride transparent glass ceramics with a composition of 45SiO(2)-20Al(2)O(3)-10CaO-25CaF(2) were synthesized and irradiated by gamma ray. The effects of CeO2/TiO2 on the structure and optical properties of the samples before and after irradiation were investigated. Doping with CeO2 causes network depolymerization and conversion of [AlO6] to [AlO4], enlarging the percolation region and promoting CaF2 crystallization. Co-doping with CeO2/TiO2 helps reduce the intrinsic coloring of transparent glass ceramics containing only CeO2, and the addition of TiO2 enhances network interconnectivity, suppressing CaF2 crystallization. Doping with CeO2 and/or TiO2 improves the structural stability of transparent glass ceramics upon irradiation and maintains the optical band gap and Urbach energy constant due to the defect saturation over the irradiation dose. Doping solely with CeO2 allows for a lower radiation-induced absorption coefficient than co-doping CeO2/TiO2 because of the enhanced crystallization induced by CeO2 and balanceable light absorption of polyvalent cerium ions. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：104 / 112

页数：9

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