Journal ArticleDOI
Rare earth and transition metal based entropy stabilised perovskite type oxides
Abhishek Sarkar,Ruzica Djenadic,Di Wang,Christina Hein,Ralf Kautenburger,Oliver Clemens,Oliver Clemens,Horst Hahn +7 more
TLDR
In this article, multicomponent oxides with perovskite type of structure containing up to 10 different cations in equiatomic amounts have been synthesized for the first time.Abstract:
Multicomponent oxides with perovskite type of structure containing up to 10 different cations in equiatomic amounts have been synthesised for the first time. Out of eleven systems synthesised, only six systems crystallised as single phase perovskite type compounds with random and homogenous cation distribution on the respective sites. The formation of phase pure 10-cationic system, (Gd0.2La0.2Nd0.2Sm0.2Y0.2)(Co0.2Cr0.2Fe0.2Mn0.2Ni0.2)O3, in contrast to the multiphase mixtures observed in five of the lower entropy systems (containing 6 cations) indicates a possible role of entropy in the stabilisation of a single phase crystal structure. The entropy driven structural stabilisation effect is further supported by the reversible phase transformation, from single phase to multiple phase upon cyclic heat treatment, observed in the (Gd0.2La0.2Nd0.2Sm0.2Y0.2)MnO3 system. This type of entropic signature has been observed in rocksalt based high entropy oxide systems. However, it has not been reported before for perovskite based compounds, as shown in this study.read more
Citations
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High-entropy ceramics
TL;DR: In this paper, the authors discuss the current state of the disordered ceramics field by examining the applications and the high-entropy features fuelling them, covering both theoretical predictions and experimental results.
Journal ArticleDOI
High entropy oxides for reversible energy storage
Abhishek Sarkar,Leonardo Velasco,Di Wang,Qingsong Wang,Gopichand Talasila,Lea de Biasi,Christian Kübel,Torsten Brezesinski,Subramshu S. Bhattacharya,Horst Hahn,Ben Breitung +10 more
TL;DR: It is found that the stabilization effect of entropy brings significant benefits for the storage capacity retention of high entropy oxides and greatly improves the cycling stability, and the electrochemical behavior of the high entropy Oxides depends on each of the metal cations present, thus providing the opportunity to tailor the Electrochemical properties by simply changing the elemental composition.
Journal ArticleDOI
High-Entropy Oxides: Fundamental Aspects and Electrochemical Properties.
Abhishek Sarkar,Qingsong Wang,Alexander Schiele,Mohammed Reda Chellali,Subramshu S. Bhattacharya,Di Wang,Torsten Brezesinski,Horst Hahn,Leonardo Velasco,Ben Breitung +9 more
TL;DR: The diversity of materials design, provided by the entropy-mediated phase-stabilization concept, allows engineering of new oxide candidates for practical applications, warranting further studies in this emerging field of materials science.
Journal ArticleDOI
High-entropy ceramics: Present status, challenges, and a look forward
Huimin Xiang,Yan Xing,Fu zhi Dai,Hongjie Wang,Lei Su,Lei Miao,Guo-Jun Zhang,Yiguang Wang,Xiwei Qi,Lei Yao,Hailong Wang,Biao Zhao,Jianqiang Li,Yanchun Zhou +13 more
TL;DR: High-entropy ceramics (HECs) as mentioned in this paper are solid solutions of inorganic compounds with one or more Wyckoff sites shared by equal or near-equal atomic ratios of multi-principal elements.
Journal ArticleDOI
A five-component entropy-stabilized fluorite oxide
TL;DR: In this paper, a new entropy-stabilized fluorite oxide was reported, formed by solid-state reacting the equimolar mixture of CeO2, ZrO2 and HfO2.
References
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Journal ArticleDOI
Die Gesetze der Krystallochemie
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Journal ArticleDOI
Entropy-stabilized oxides
Christina M. Rost,Edward Sachet,Trent Borman,Ali Moballegh,Elizabeth C. Dickey,Dong Hou,Jacob L. Jones,Stefano Curtarolo,Jon Paul Maria +8 more
TL;DR: It is demonstrated beyond reasonable doubt that entropy predominates the thermodynamic landscape, and drives a reversible solid-state transformation between a multiphase and single-phase state.