期刊
JOURNAL OF ASIAN CERAMIC SOCIETIES
卷 7, 期 2, 页码 127-132出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/21870764.2019.1595931
关键词
High entropy; entropy-stabilized oxides; perovskite; SPS; reactive SPS
资金
- Thousand Talents Program of China and Sichuan Province
- Open Project of State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials [17kffk01]
- Outstanding Young Scientific and Technical Talents in Sichuan Province [2019JDJQ0009]
- Natural Sciences Foundation of China [51741208]
A rising interest in entropy-stabilized oxides in recent years has been driven by their attractive functional properties. Their synthesis usually requires prolonged exposure at high temperature to promote solid-state diffusion without the application of pressure. In this work, we report the synthesis of a high entropy perovskite, Sr((Zr0.94Y0.06)(0.2)Sn0.2Ti0.2Hf0.2Mn0.2)O3-x, in a relatively short time (minutes instead of hours) using a spark plasma sintering (SPS) furnace. Comparative analysis showed that conventional pressureless sintering at 1500 degrees C for 2 h results in porous materials with large thermodynamically stable pores (tens of mu m), while SPS processing produces dense materials in a single step by reactive sintering at 1475 degrees C in 9 min. SPS is therefore an attractive route for the production, synthesis and sintering of dense high-entropy oxides.
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