论文标题
从高渗透陶瓷到构图复杂的陶瓷的迈出一步：一种新的视角
A Step Forward from High-Entropy Ceramics to Compositionally Complex Ceramics: A New Perspective
论文作者
论文摘要
自2015年以来，高渗透陶瓷（HEC）已迅速引起人们的关注。迄今为止，几乎所有工作都集中在五组分，等摩尔组成上。这篇观点文章简要回顾了不同的HEC家族和选定的财产。经过几项最新研究，我们提出了向前迈出的一步，将HEC扩展到组成复杂的陶瓷（CCC），以包括中透镜和非等摩尔组成。我们将有缺陷的氟氧化物和有序的pyrochlore氧化物作为两个主要例子，我们进一步考虑了具有两个阳离子sublattices的Aliovalent阳离子和阴离子空位的复杂性以及有序的结构。在具有最佳量的氧空位和具有实质性尺寸障碍的有序的pyrochlores中，已经发现了更好的热胰岛和僵硬的CCC。已经证明，中型陶瓷（MEC）可以在其高渗透对应物上占上风。与HEC相比，多元化的CCC类别提供了更多的可能性，以量身定制组成，缺陷，疾病/秩序以及随之而来的各种特性。
High-entropy ceramics (HECs) have quickly gained attention since 2015. To date, nearly all work has focused on five-component, equimolar compositions. This perspective article briefly reviews different families of HECs and selected properties. Following a couple of our most recent studies, we propose a step forward to expand HECs to Compositionally Complex ceramics (CCCs) to include medium-entropy and non-equimolar compositions. Using defective fluorite and ordered pyrochlore oxides as two primary examples, we further consider the complexities of aliovalent cations and anion vacancies as well as ordered structures with two cation sublattices. Better thermally-insulating yet stiff CCCs have been found in non-equimolar compositions with optimal amounts of oxygen vacancies and in ordered pyrochlores with substantial size disorder. It is demonstrated that medium-entropy ceramics (MECs) can prevail over their high-entropy counterparts. The diversifying classes of CCCs provide even more possibilities than HECs to tailor the composition, defects, disorder/order, and, consequently, various properties.
