High-entropy columbites: structure, optical and electrical properties
- 作者: Koroleva M.S.1, Maksimov V.S.1,2, Korolev D.A.3, Piir I.V.1
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隶属关系:
- Institute of Chemistry FRC Komi SC UB RAS
- Pitirim Sorokin Syktyvkar State University
- ITMO University
- 期: 卷 61, 编号 3 (2025)
- 页面: 172-179
- 栏目: Special issue based on the reports at the 17th International Meeting “Fundamental and Applied Problems of Solid State Ionics” (Chernogolovka, June 16–23, 2024)
- URL: https://journal-vniispk.ru/0424-8570/article/view/296256
- DOI: https://doi.org/10.31857/S0424857025030018
- EDN: https://elibrary.ru/DXMKUW
- ID: 296256
如何引用文章
详细
A high-entropy composition (Mg0.2Zn0.2Ni0.2Co0.2Mn0.2)Nb2O6 with a columbite structure and its Ti-substituted composition (5%) were synthesized. The synthesis was carried out using a modified method of combustion solutions followed by high-temperature sintering. X-ray analysis and scanning electron microscopy were used for characterization of the ceramics. According to diffuse reflectance spectra, the band gap of direct electronic transitions was calculated (Egdir ≈ 2.98–3.05 eV). Solid solutions are characterized predominantly by electronic conductivity. Substitution of niobium cations with titanium leads to an increase in conductivity by 1.2 orders of magnitude in the temperature range 160–750°C.
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作者简介
M. Koroleva
Institute of Chemistry FRC Komi SC UB RAS
Email: marikorolevas@gmail.com
俄罗斯联邦, Syktyvkar
V. Maksimov
Institute of Chemistry FRC Komi SC UB RAS; Pitirim Sorokin Syktyvkar State University
编辑信件的主要联系方式.
Email: marikorolevas@gmail.com
俄罗斯联邦, Syktyvkar; Syktyvkar
D. Korolev
ITMO University
Email: marikorolevas@gmail.com
俄罗斯联邦, Saint-Petersburg
I. Piir
Institute of Chemistry FRC Komi SC UB RAS
Email: piyr-iv@chemi.komisc.ru
俄罗斯联邦, Syktyvkar
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补充文件

注意
2 Based on the materials of the report at the 17th International Meeting “Fundamental and applied problems of solid state ionics”, Chernogolovka, June 16–23, 2024.