Abstract Scope |
We first reported various single-phase equimolar five-component high-entropy ceramics (HECs), including MB2 [Scientific Reports 2016], MB [Scripta 2020], M3B4 [JAC 2021], and MB4 [JECS 2020] borides, MSi2 [JMat 2019] and M3Si5 [Scripta 2022] silicides, aluminides [Science Bulletin 2019], perovskite [Scripta 2018] and fluorite [JECS 2018] oxides. We further proposed to extend HECs to "compositionally complex ceramics (CCCs)" [JECS 2020, JMS 2020] in include non-equimolar compositions and short- and long-range ordering that reduce configurational entropies but offer additional dimensions to tailor and improve properties. We also reported the first dual-phase HECs [JECS 2020]. Recently, we investigated short-range ordering, order-disorder transitions, and 10- to 21-component ultrahigh-entropy phases [Acta 2021 & 2022, Scripta 2022, JAC 2022, JECS 2023 & 2024] in fluorite-based compositionally complex oxides (CCFBOs). We also developed compositionally complex perovskite oxides (CCPOs) for solar thermochemical hydrogen generation [Chem Mater 2023, JMCA 2024] and solid electrolytes used for solid-state batteries [Matter 2023]. |