A novel, high-entropy, perovskite-structured, solid solution La(Fe_0.2Co_0.2Ni_0.2Cr_0.2Mn_0.2)O₃ ceramic was successfully synthesized via high-temperature solid-state reaction. The crystal structure, microstructure, infrared emissivity, and thermophysical properties were investigated. The experimental results indicated that La(Fe_0.2Co_0.2Ni_0.2Cr_0.2Mn_0.2)O₃ exhibited an infrared emissivity as high as .92 in the near-infrared region of .76–2.50 μm. The thermal conductivity was 1.38–1.72 W m⁻¹ K⁻¹ in the temperature range of 25–1200°C.

中文翻译：

---

具有高发射率和低热导率的高熵 La(Fe0.2Co0.2Ni0.2Cr0.2Mn0.2)O3 陶瓷

通过高温固相反应成功合成了一种新型的高熵钙钛矿结构固溶体La(Fe _0.2 Co _0.2 Ni _0.2 Cr _0.2 Mn _0.2 )O _3陶瓷。研究了晶体结构、微观结构、红外发射率和热物理性质。实验结果表明，La(Fe _0.2 Co _0.2 Ni _0.2 Cr _0.2 Mn _0.2 )O ₃在0.76-2.50 μm的近红外区域表现出高达0.92的红外发射率。热导率为 1.38–1.72 W m ^-1  K ^-1在 25–1200°C 的温度范围内。