Abstract: 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.

Key words: high entropy zirconia, phase transformation, light absorption