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. Issue 7 (1st April 2022)

• Record Type: Journal Article
• Authors: Zhivulin, V.E.; Trofimov, E.A.; Gudkova, S.A.; Punda, A. Yu.; Valiulina, A.N.; Gavrilyak, A.M.; Zaitseva, O.V.; Tishkevich, D.I.; Zubar, T.I.; Sun, Zhipeng; Zhou, Di; Trukhanov, S.V.; Vinnik, D.A.; Trukhanov, A.V.
• Is Part Of: Ceramics international. Volume 48:Issue 7(2022)
• Page Start: 9239
• Page End: 9247
• Publication Date: 2022-04-01
• Subjects: Perovskites -- High entropy oxides -- Electrical properties -- Conduction mechanisms -- Rare-earth elements; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.12.110
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: High entropy perovskites LnCr0.2 Mn0.2 Fe0.2 Co0.2 Ni0.2 O3 ceramics were produced by solid-state reactions from oxides. The B-site chemical composition was fixed (Cr0.2 Mn0.2 Fe0.2 Co0.2 Ni0.2 ) and A-site composition was varied by the rare-earth ions (Ln = Sm 3+, Eu 3+ and Gd 3+ ). 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.