The modification of BaCe0.5Zr0.3Y0.2O3–δ with copper oxide: Effect on the structural and transport properties
- Authors: Lyagaeva Y.G.1, Vdovin G.K.1, Nikolaenko I.V.2,3, Medvedev D.A.1,2, Demin A.K.1
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Affiliations:
- Institute of High-Temperature Electrochemistry, Ural Branch
- Ural Federal University
- Institute of Solid State Chemistry, Ural Branch
- Issue: Vol 50, No 6 (2016)
- Pages: 839-843
- Section: Fabrication, Treatment, and Testing of Materials and Structures
- URL: https://journals.rcsi.science/1063-7826/article/view/197324
- DOI: https://doi.org/10.1134/S1063782616060142
- ID: 197324
Cite item
Abstract
The effect of the content of CuO additive on the sinterability, phase composition, microstructure, and electrical properties of BaCe0.5Zr0.3Y0.2O3–δ proton-conducting material is studied. Ceramic samples were produced by the citrate–nitrate synthesis method with the addition of 0, 0.25, 0.5, and 1% CuO. It is shown that the relative density of the samples containing 0.5 and 1% CuO is higher than 94% at a sintering temperature of 1450°C, whereas the relative density of the material is no higher than 85% at a lower content of the sintering additive. From the data of X-ray diffraction analysis and scanning electron microscopy, it is established that the introduction of a small CuO content (0.25%) is inadequate for single-phase and high-dense ceramics to be formed. The conductivity and scanning electron microscopy data show that the sample with BaCe0.5Zr0.3Y0.2O3–δ + 0.5% CuO composition possesses high total and ionic conductivities as well as a high degree of microstructural stability after hydrogen reduction of the ceramics. The citrate–nitrate method modified by the introduction of a small CuO content can be recommended for the production of single-phase, gas-tight, and high-conductivity electrolytes based on both BaCeO3 and BaZrO3.
About the authors
Yu. G. Lyagaeva
Institute of High-Temperature Electrochemistry, Ural Branch
Email: dmitrymedv@mail.ru
Russian Federation, Yekaterinburg, 620137
G. K. Vdovin
Institute of High-Temperature Electrochemistry, Ural Branch
Email: dmitrymedv@mail.ru
Russian Federation, Yekaterinburg, 620137
I. V. Nikolaenko
Ural Federal University; Institute of Solid State Chemistry, Ural Branch
Email: dmitrymedv@mail.ru
Russian Federation, Yekaterinburg, 620002; Yekaterinburg, 620990
D. A. Medvedev
Institute of High-Temperature Electrochemistry, Ural Branch; Ural Federal University
Author for correspondence.
Email: dmitrymedv@mail.ru
Russian Federation, Yekaterinburg, 620137; Yekaterinburg, 620002
A. K. Demin
Institute of High-Temperature Electrochemistry, Ural Branch
Email: dmitrymedv@mail.ru
Russian Federation, Yekaterinburg, 620137