Impact of the A-site rare-earth ions (Ln3+ – Sm3+, Eu3+, Gd3+) on structure and electrical properties of the high entropy LnCr0.2Mn0.2Fe0.2Co0.2Ni0.2O3 perovskites
Zhivulin V.E. Trofimov E.A. Gudkova S.A. Punda A.Y. Valiulina A.N. Gavrilyak A.M. Zaitseva O.V. Tishkevich D.I. Zubar T.I. Sun Z. Zhou D. Trukhanov S.V. Vinnik D.A. Trukhanov A.V.
1 April 2022Elsevier Ltd
Ceramics International
2022#48Issue 79239 - 9247 pp.
High entropy perovskites LnCr0.2Mn0.2Fe0.2Co0.2Ni0.2O3 ceramics were produced by solid-state reactions from oxides. The B-site chemical composition was fixed (Cr0.2Mn0.2Fe0.2Co0.2Ni0.2) and A-site composition was varied by the rare-earth ions (Ln = Sm3+, Eu3+ and Gd3+). The entropy of B-sublattice mixing was 1.609R J/(mol*K). The dependences of the lattice parameters, microstructure features, and electrical properties were discussed as function of the A-site rare-earth ions. The correlation of the lattice parameters with the nature of the A-site rare earth ions was demonstrated. Impact of the rare-earth ions in A-site on microstructural parameters was observed. Charge conduction mechanisms were discussed in details for a wide range of temperatures.
Conduction mechanisms , Electrical properties , High entropy oxides , Perovskites , Rare-earth elements
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South Ural State University, Chelyabinsk, 454080, Russian Federation
SSPA “Scientific and Practical Materials Research Centre of NAS of Belarus”, Minsk, 220072, Belarus
Guangdong University of Technology, Materials and Energy School, Panyu District, Guangzhou, 510006, China
Xian Jiaotong University, Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, School of Electronic Science and Engineering, Xian, 710049, China
L.N. Gumilyov Eurasian National University, 2, Satpayev Str., Nur-Sultan, 010000, Kazakhstan
South Ural State University
SSPA “Scientific and Practical Materials Research Centre of NAS of Belarus”
Guangdong University of Technology
Xian Jiaotong University
L.N. Gumilyov Eurasian National University
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