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Electrical properties and defect chemistry of anatase (TiO2)
Affiliation:1. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky pr. 31, Moscow 119991, Russia;2. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky pr. 31, Moscow 119991, Russia;1. SUNAG Laboratory, Institute of Physics, Sachivalaya Marg, Bhubaneswar 751 005, Odisha, India;2. Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai, 400 085, India;1. AGH University of Science and Technology, Faculty of Materials Science and Ceramics, al. A. Mickiewicza 30, 30-059 Krakow, Poland;2. Polish Academy of Sciences, Jerzy Haber Institute of Catalysis and Surface Chemistry, ul. Niezapominajek 8, 30-239 Krakow, Poland;1. Department of Physics, Government College University, Faisalabad, Pakistan;2. College of Arts and Science, Abu Dhabi University, United Arab Emirates;3. Department of Nuclear Engineering, College of Engineering, King AbdulAziz University (KAU), Jeddah, P.O. Box 80204, 21589 Jeddah, Saudi Arabia;4. Department of Physics, Division of Science and Technology, University of Education Lahore, Pakistan
Abstract:
The electrical properties of pure Anatase are investigated by impedance spectroscopy as function of temperature and oxygen partial pressure. The experimental results are fully interpreted by point defect chemistry. A transition from predominant Schottky to Frenkel cation disorder is observed when the temperature increases and/or the oxygen partial pressure decreases. The reduction enthalpies are near those obtained for Rutile in previous studies.
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