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.

High entropy Sr((Zr0.94Y0.06)0.2Sn0.2Ti0.2Hf0.2Mn0.2)O3−x perovskite synthesis by reactive spark plasma sintering / Biesuz, M.; Fu, S.; Dong, J.; Jiang, A.; Ke, D.; Xu, Q.; Zhu, D.; Bortolotti, M.; Reece, M. J.; Hu, C.; Grasso, S.. - In: JOURNAL OF ASIAN CERAMIC SOCIETIES. - ISSN 2187-0764. - 7:2(2019), pp. 127-132. [10.1080/21870764.2019.1595931]

High entropy Sr((Zr0.94Y0.06)0.2Sn0.2Ti0.2Hf0.2Mn0.2)O3−x perovskite synthesis by reactive spark plasma sintering

Biesuz M.;Bortolotti M.;
2019-01-01

Abstract

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.
2019
2
Biesuz, M.; Fu, S.; Dong, J.; Jiang, A.; Ke, D.; Xu, Q.; Zhu, D.; Bortolotti, M.; Reece, M. J.; Hu, C.; Grasso, S.
High entropy Sr((Zr0.94Y0.06)0.2Sn0.2Ti0.2Hf0.2Mn0.2)O3−x perovskite synthesis by reactive spark plasma sintering / Biesuz, M.; Fu, S.; Dong, J.; Jiang, A.; Ke, D.; Xu, Q.; Zhu, D.; Bortolotti, M.; Reece, M. J.; Hu, C.; Grasso, S.. - In: JOURNAL OF ASIAN CERAMIC SOCIETIES. - ISSN 2187-0764. - 7:2(2019), pp. 127-132. [10.1080/21870764.2019.1595931]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/243060
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