A new class of high-entropy perovskite oxides

作者：Jiang, Sicong; Hu, Tao; Gild, Joshua; Zhou, Naixie; Nie, Jiuyuan; Qin, Mingde; Harrington, Tyler; Vecchio, Kenneth; Luo, Jian^*

来源：Scripta Materialia, 2018, 142: 116-120.

DOI：10.1016/j.scriptamat.2017.08.040

• High-entropy ceramics
• Perovskite
• Phase stability

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)O-3, SI(Zr0.2Sn0.2Ti0.2Hf0.2Mn0.2)O-3, Ba(Zr0.2Sn0.2Ti0.2Hf0.2Mn0.2)O-3, Ba(Zr0.2Sn0.2Ti0.2Hf0.2Mn0.2)O-3 - x, Ba(Zr0.2Sn0.2Ti0.2Hf0.2Mn0.2)O-3 and (Sr(0.5)Ea(0.5))(Zr0.2Sn0.2Ti0.2Hf0.2Mn0.2)O-3, 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.

• 出版日期2018-1-1
• 单位中南大学