The modification of BaCe0.5Zr0.3Y0.2O3–δ with copper oxide: Effect on the structural and transport properties
- Autores: Lyagaeva Y.1, Vdovin G.1, Nikolaenko I.2,3, Medvedev D.1,2, Demin A.1
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Afiliações:
- Institute of High-Temperature Electrochemistry, Ural Branch
- Ural Federal University
- Institute of Solid State Chemistry, Ural Branch
- Edição: Volume 50, Nº 6 (2016)
- Páginas: 839-843
- Seção: 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
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Resumo
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.
Sobre autores
Yu. Lyagaeva
Institute of High-Temperature Electrochemistry, Ural Branch
Email: dmitrymedv@mail.ru
Rússia, Yekaterinburg, 620137
G. Vdovin
Institute of High-Temperature Electrochemistry, Ural Branch
Email: dmitrymedv@mail.ru
Rússia, Yekaterinburg, 620137
I. Nikolaenko
Ural Federal University; Institute of Solid State Chemistry, Ural Branch
Email: dmitrymedv@mail.ru
Rússia, Yekaterinburg, 620002; Yekaterinburg, 620990
D. Medvedev
Institute of High-Temperature Electrochemistry, Ural Branch; Ural Federal University
Autor responsável pela correspondência
Email: dmitrymedv@mail.ru
Rússia, Yekaterinburg, 620137; Yekaterinburg, 620002
A. Demin
Institute of High-Temperature Electrochemistry, Ural Branch
Email: dmitrymedv@mail.ru
Rússia, Yekaterinburg, 620137