Abstract
We present a simple way to fabricate high-entropy (La0.2Nd0.2Sm0.2Dy0.2Yb0.2)2Zr2O7 (HE-RE2Zr2O7) ceramic nanofibers using the electrospinning and annealing processing in this work. The microstructure of nanofibers was characterized by thermal gravity-differential scanning calorimetry (TG-DSC), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM), respectively. Meanwhile, the diameter and grain growth of HE-RE2Zr2O7 nanofibers under 1000 °C was analyzed. Results indicate that HE-RE2Zr2O7 nanofibers can be prepared at temperatures above 400 °C and the crystallite size can be controlled by annealing temperature. Both diameter and the grain growth of HE-RE2Zr2O7 nanofibers are lower than that of La2Zr2O7 nanofibers, attributed to the sluggish diffusion effect. The advantages of HE-RE2Zr2O7 nanofibers can further enlarge the application of nanofibers in the aspect of high-temperature thermal insulation materials.
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