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RAS Chemistry & Material ScienceЖурнал неорганической химии Russian Journal of Inorganic Chemistry

  • ISSN (Print) 0044-457X
  • ISSN (Online) 3034-560X

CORRELATION BETWEEN ELECTRICAL PROPERTIES AND STRUCTURAL AND MORPHOLOGICAL CHARACTERISTICS OF SAMPLES IN THE QUASI-BINARY EUTECTIC SYSTEM Ba2In2O5-Ba2InNbO6

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PII
10.31857/S0044457X24120215-1
DOI
10.31857/S0044457X24120215
Publication type
Article
Status
Published
Authors
E. S Matveev
  • Affiliation: Ural Federal University named after. first President of Russia B.N. Yeltsin
M. V. Kozlova
  • Affiliation: Ural Federal University named after. first President of Russia B.N. Yeltsin
Volume/ Edition
Volume 69 / Issue number 12
Pages
1892-1904
Abstract
The structural and morphological properties of samples in the eutectic systemBa2In2O5—Ba2InNbO6 were studied when processed below and above the eutectic temperature. Has been determined the presence of a narrow region of homogeneity — solid solution Ba2In2-xNbxO5+x (x ≤ 0.05) and the formation of composites of composition (1 - y)Ba2In1.95Nb0.05O5.05 • yBa2InNbO6. In composites with y ≤ 0.15 for the main phase, a structure with a disordered arrangement of oxygen vacancies is stabilized. The total electrical conductivity in a dry air atmosphere is determined primarily by oxygen-ion transfer and increases for both solid solution and composites; the maximum increase by ~2 orders of magnitude is observed for composite samples with y = 0.15, 0.25, processed above the eutectic temperature. The increase in electrical conductivity is due to the combined influence of structural and morphological factors. Composites processed above the eutectic temperature are characterized by a special morphology — a layer of submicron-sized crystallites is formed on the surface of the grains of the main phase during crystallization of the eutectic, which determines the appearance of the compositional effect of electrical conductivity.
Keywords
сложные оксиды кислородно-ионная проводимость композиционные эвтектические электролиты
Date of publication
15.12.2024
Year of publication
2024
Number of purchasers
0
Views
55

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