期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 863, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.158763
关键词
High-entropy ceramics; Rare earth; Sol-gel method; Electrical conductivity; Porous
资金
- Transformational Technologies for Clean Energy and Demonstration, Strategic Priority Research Program of the Chinese Academy of Sciences [XDA21000000]
- 2020 Opening Foundation of State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization, China [2020Z2117]
- Science and Technology Projects of Xiamen, China [3502Z20193080]
A single-phase homogeneous (La0.2Y0.2Nd0.2Gd0.2Sr0.2)CrO3 powder was synthesized using the sol-gel method, showing fine and uniform crystal grains under mild experimental conditions. By sintering with cellulose nanocrystals, the powder exhibited high electrical conductivity, with its properties indicating promise in the field of high-temperature electrochemical materials.
A single-phase homogeneous (La0.2Y0.2Nd0.2Gd0.2Sr0.2)CrO3 powder with high configurational entropy was synthesized by using the sol-gel method. The powder was obtained under mild experimental conditions, the crystal grains were fine and uniform, and the elements were evenly dispersed. We sintered the powders into monolithic porous green body by adding cellulose nanocrystals, which had good electrical conductivity. Their electrical conductivity at room temperature was approximately 6.6743 O center dot cm when the porosity was 38.90%. The experimental results showed that as the porosity increased, the resistivity increased and the thermal conductivity decreased accordingly. This trend occurred because of an increase in the porosity and a decrease in the connection of the particles; thus, the electron hole carriers were subjected to a greater resistance when passing through the junction. The combination of these properties indicates that the porous high-entropy (La0.2Y0.2Nd0.2Gd0.2Sr0.2)CrO3 ceramic possesses promise in the field of high-temperature electrochemical materials. (C) 2021 Elsevier B.V. All rights reserved.
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