A new class of high-entropy perovskite oxides
Scripta Materialia, 2018•Elsevier
A new class of high-entropy perovskite oxides (ie, multiple-cation solid solutions with high
configurational entropies) has been synthesized. Six of the 13 compositions examined,
including Sr (Zr 0.2 Sn 0.2 Ti 0.2 Hf 0.2 Mn 0.2) O 3, Sr (Zr 0.2 Sn 0.2 Ti 0.2 Hf 0.2 Nb 0.2) O
3, Ba (Zr 0.2 Sn 0.2 Ti 0.2 Hf 0.2 Ce 0.2) O 3, Ba (Zr 0.2 Sn 0.2 Ti 0.2 Hf 0.2 Y 0.2) O 3− x, Ba
(Zr 0.2 Sn 0.2 Ti 0.2 Hf 0.2 Nb 0.2) O 3 and (Sr 0.5 Ba 0.5)(Zr 0.2 Sn 0.2 Ti 0.2 Hf 0.2 Nb 0.2)
O 3, can form homogeneous single solid-solution phases. Goldschmidt's tolerance factor …
configurational entropies) has been synthesized. Six of the 13 compositions examined,
including Sr (Zr 0.2 Sn 0.2 Ti 0.2 Hf 0.2 Mn 0.2) O 3, Sr (Zr 0.2 Sn 0.2 Ti 0.2 Hf 0.2 Nb 0.2) O
3, Ba (Zr 0.2 Sn 0.2 Ti 0.2 Hf 0.2 Ce 0.2) O 3, Ba (Zr 0.2 Sn 0.2 Ti 0.2 Hf 0.2 Y 0.2) O 3− x, Ba
(Zr 0.2 Sn 0.2 Ti 0.2 Hf 0.2 Nb 0.2) O 3 and (Sr 0.5 Ba 0.5)(Zr 0.2 Sn 0.2 Ti 0.2 Hf 0.2 Nb 0.2)
O 3, can form homogeneous single solid-solution phases. Goldschmidt's tolerance factor …
Abstract
A new class of high-entropy perovskite oxides (i.e., multiple-cation solid solutions with high configurational entropies) has been synthesized. Six of the 13 compositions examined, including Sr(Zr0.2Sn0.2Ti0.2Hf0.2Mn0.2)O3, Sr(Zr0.2Sn0.2Ti0.2Hf0.2Nb0.2)O3, Ba(Zr0.2Sn0.2Ti0.2Hf0.2Ce0.2)O3, Ba(Zr0.2Sn0.2Ti0.2Hf0.2Y0.2)O3 − x, Ba(Zr0.2Sn0.2Ti0.2Hf0.2Nb0.2)O3 and (Sr0.5Ba0.5)(Zr0.2Sn0.2Ti0.2Hf0.2Nb0.2)O3, can form homogeneous single solid-solution phases. Goldschmidt's tolerance factor, instead of cation-size difference, influences the formation and temperature-stability of single cubic perovskite solid solutions. This new class of multicomponent (high-entropy) perovskite solid solutions with distinct and highly-tunable chemistries can enable simultaneous tailoring of multiple properties and potentially lead to new functionality.
Elsevier
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