Facile Preparation, Microstructure and Dielectric Properties of La(Cr_0.2Mn_0.2Fe_0.2Co_0.2Ni_0.2)O₃ Perovskite High-Entropy Ceramics

Preparation and properties of La(Cr_0.2Mn_0.2Fe_0.2Co_0.2Ni_0.2)O₃ high-entropy ceramics are investigated. La(Cr_0.2Mn_0.2Fe_0.2Co_0.2Ni_0.2)O₃ high-entropy ceramics are prepared by a traditional two-step solid-state reaction method in air. La(Cr_0.2Mn_0.2Fe_0.2Co_0.2Ni_0.2)O₃ single-phase powders are synthesized by calcining the mixed oxides at 1000 °C for 20 h. The high-entropy ceramics are sintered at 1350–1650 °C in a muffle furnace for 4 h by using the above powders. The phase compositions of the high-entropy ceramics at different temperatures are characterized by X-ray diffraction (XRD) with Cu Kα radiation. A field-emission scanning electron microscope with energy-dispersive spectroscopy (EDS) is used to observe the microstructures and analyze the elemental distributions. The hardness and dielectric properties are measured and discussed.