Grain size-dependent electrical properties of rutile (TiO2)
作者： C Demetry
DOI: 10.1016/S0167-2738(98)00454-8
关键词: Materials science 、 Grain boundary 、 Microcrystalline 、 Single crystal 、 Conductivity 、 Crystallite 、 Rutile 、 Nanocrystalline material 、 Mineralogy 、 Analytical chemistry 、 Grain size
摘要: Abstract The electrical behavior of Sn-doped nanocrystalline and microcrystalline TiO 2 has been studied by DC conductivity measurements impedance spectroscopy. Specimens were hot pressed from powders synthesized a solution chemical method, resulting in highly dense, 100% rutile with an average grain size ∼50 nm. Results indicate that enhanced relative to , lower specific boundary resistivity. activation energy for conduction air both is than values obtained the literature polycrystalline single crystal rutile. Furthermore, over range oxygen partial pressures exhibits P O -independent regime unique compared past studies
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