通过高温烧结法制备了一组含 Ce、Al、Y 和 Si 元素的氧化锆基高熵陶瓷, 并对其相结构转变和光吸收特性等方面进行研究. X 射线衍射仪 (X-ray diffractometer, XRD) 测试结果表明, 样品能在 1 450 › 下完成立方氧化锆相的转变; 扫描电子显微镜 (scanning electron microscope, SEM) 测试结果表明, 掺杂后的氧化锆基陶瓷颗粒出现晶粒细化, 最小平均晶粒尺寸达 234 nm; X 射线光电子能谱 (X-ray photoelectron spectroscopy, XPS) 结果表明, 氧空位浓度与 Ce∶Zr 原子比呈正相关. 烧结后的样品抗弯强度最大可达 130.32 MPa, 孔隙率最低至 0.15%, 可见吸收光范围最大为 513 nm, 掺杂后最小禁带宽度达 2.97 eV.

A group of zirconia-based high-entropy ceramics containing Ce, Al, Y and Si was prepared using a high-temperature sintering method, and the phase structure tran-sition and optical absorption characteristics were studied. X-ray diffractometer (XRD) results showed that the cubic zirconia phase transformation was completed at 1 450 ›. Scanning electron microscopy (SEM) results showed that the doped zirconia ceramic particles exhibited grain refinement, with a minimum average grain size of 234 nm. X-ray photoelectron spectroscopy (XPS) results showed that the oxygen vacancy concentration was positively correlated with the Ce∶Zr atomic ratio. The maximum bending strength of the sintered sample was 130.32 MPa, the minimum porosity was 0.15%, the maximum visible absorption range was 513 nm, and the minimum bandgap after doping was 2.97 eV.