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Title: Dielectric Properties of Nanocrystalline Tungsten Oxide in the Temperature Range of 223–293 K

Abstract

The dielectric properties of nanocrystalline tungsten oxide are studied in the temperature range of 223–293 K and in the frequency range ν = 10{sup –2}–10{sup 6} Hz. Powders of WO{sub 3} with particle sizes of 110, 150, and 200 nm are prepared by the heat treatment of ammonium paratungstate at various temperatures. It is established that the frequency dependences of the conductivity for all samples increase with an increase in frequency, while the polarization characteristics ε'(ν) and ε'(ν) decrease. It is found that the frequency dependences of the conductivity are described by a function of the form ν{sup s} with an index in the range of (0.83–0.90) ± 0.01, which is characteristic of the “hopping” mechanism of charged-particle motion (complexes) over localized states confined by potential barriers and structural defects.

Authors:
 [1];  [2]; ; ;  [1]
  1. Russian Academy of Sciences, Kurnakov Institute of General and Inorganic Chemistry (Russian Federation)
  2. Moscow Pedagogical State University (Russian Federation)
Publication Date:
OSTI Identifier:
22749882
Resource Type:
Journal Article
Journal Name:
Semiconductors
Additional Journal Information:
Journal Volume: 52; Journal Issue: 7; Other Information: Copyright (c) 2018 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1063-7826
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CHARGED PARTICLES; CRYSTAL DEFECTS; DIELECTRIC PROPERTIES; FREQUENCY DEPENDENCE; FREQUENCY RANGE; HEAT TREATMENTS; NANOSTRUCTURES; PARTICLE SIZE; TEMPERATURE RANGE; TUNGSTATES; TUNGSTEN OXIDES

Citation Formats

Kozyukhin, S. A., E-mail: sergkoz@igic.ras.ru, Bedin, S. A., Rudakovskaya, P. G., Ivanova, O. S., and Ivanov, V. K. Dielectric Properties of Nanocrystalline Tungsten Oxide in the Temperature Range of 223–293 K. United States: N. p., 2018. Web. doi:10.1134/S1063782618070114.
Kozyukhin, S. A., E-mail: sergkoz@igic.ras.ru, Bedin, S. A., Rudakovskaya, P. G., Ivanova, O. S., & Ivanov, V. K. Dielectric Properties of Nanocrystalline Tungsten Oxide in the Temperature Range of 223–293 K. United States. doi:10.1134/S1063782618070114.
Kozyukhin, S. A., E-mail: sergkoz@igic.ras.ru, Bedin, S. A., Rudakovskaya, P. G., Ivanova, O. S., and Ivanov, V. K. Sun . "Dielectric Properties of Nanocrystalline Tungsten Oxide in the Temperature Range of 223–293 K". United States. doi:10.1134/S1063782618070114.
@article{osti_22749882,
title = {Dielectric Properties of Nanocrystalline Tungsten Oxide in the Temperature Range of 223–293 K},
author = {Kozyukhin, S. A., E-mail: sergkoz@igic.ras.ru and Bedin, S. A. and Rudakovskaya, P. G. and Ivanova, O. S. and Ivanov, V. K.},
abstractNote = {The dielectric properties of nanocrystalline tungsten oxide are studied in the temperature range of 223–293 K and in the frequency range ν = 10{sup –2}–10{sup 6} Hz. Powders of WO{sub 3} with particle sizes of 110, 150, and 200 nm are prepared by the heat treatment of ammonium paratungstate at various temperatures. It is established that the frequency dependences of the conductivity for all samples increase with an increase in frequency, while the polarization characteristics ε'(ν) and ε'(ν) decrease. It is found that the frequency dependences of the conductivity are described by a function of the form ν{sup s} with an index in the range of (0.83–0.90) ± 0.01, which is characteristic of the “hopping” mechanism of charged-particle motion (complexes) over localized states confined by potential barriers and structural defects.},
doi = {10.1134/S1063782618070114},
journal = {Semiconductors},
issn = {1063-7826},
number = 7,
volume = 52,
place = {United States},
year = {2018},
month = {7}
}