Neutron irradiation and post-irradiation annealing of rutile (TiO2−x): effect on hydrogen incorporation and optical absorption

被引：0
作者：
Geoffrey David Bromiley
Andrei A. Shiryaev
机构：
[1] Universität Bayreuth,Bayerisches Geoinstitut
[2] University of Cambridge,Department of Earth Sciences
[3] A.V. Shubnikov Institute of Crystallography RAS,undefined
来源：
Physics and Chemistry of Minerals | 2006年 / 33卷
关键词：
Hydrogen; Rutile; Spectroscopy; Neutron irradiation; Radiation defects;
D O I：
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中图分类号：
学科分类号：
摘要：
Neutron irradiation and post-irradiation annealing under oxidising and reducing conditions have been used to investigate H incorporation in, and the optical properties of, reduced (TiO2−x) rutile. Optical absorption in rutile is mainly due to a Ti3+ Ti4+ intervalence charge transfer effect. The main mechanism for H incorporation in rutile involves interstitial H not coupled to other defects, which has important implications for the rate of H diffusion, and possibly also on the electrical properties of rutile. Additional minor OH absorption bands in IR spectra indicate that a small amount of interstitial H is coupled to defects such as Ti3+ on the main octahedral site, and indicates that more than one H incorporation mechanism may operate. Concentration of oxygen vacancies has a controlling influence on the H affinity of rutile.
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页码：426 / 434
页数：8
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