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Title: Influence of neutron flux, frequency and temperature to electrical impedance of nano silica particles

We studied electric impedance of SiO{sub 2} nanomaterial at its initial state and after being exposed to continuous neutron irradiation for up to 20 hours. In doing so we employed a flux of neutrons of 2x10{sup 13} n⋅cm{sup −2}s{sup −1} while the frequency and temperature ranges amounted to 0,09 – 2.3 MHz and 100 – 400 K correspondingly. Analysis in terms of the Cole-Cole expression revealed that with increasing irradiation period the polarization and relaxation times decrease as a result of combination of nanoparticles. Moreover, it is demonstrated that the electric conductivity of samples, on the other hand, increases with the increasing irradiation period. At low temperatures formations of clusters at three distinct states with different energies were resolved.
Authors:
; ;  [1] ;  [2] ;  [3]
  1. Institute of Radiation Problems of Azerbaijan National Academy of Sciences, AZ 1143, B.Vahabzadeh 9, Baku (Azerbaijan)
  2. Condensed Matter Physics Department, Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana Slovenia (Slovenia)
  3. Goethe-Universität Frankfurt, Max-von-Laue-Str. 1, 60438 Frankfurt am Main (Germany)
Publication Date:
OSTI Identifier:
22420162
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 4; Journal Issue: 11; Other Information: (c) 2014 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ELECTRIC CONDUCTIVITY; ELECTRIC IMPEDANCE; IRRADIATION; NANOPARTICLES; NEUTRON FLUX; NEUTRONS; POLARIZATION; SILICA; SILICON OXIDES