Synthesis and characterization of high-entropy (La0.2Nd0.2Sm0.2Gd0.2Yb0.2)2(Zr0.75Ce0.25)2O7 nanopowders

Developing a novel ceramic nanopowder is essential for thermal-sprayed high-performance nanostructured thermal barrier coatings. Recently, high-entropy rare-earth zirconates have been extensively concerned by researchers. In the present work, we synthesized high-entropy (La 0.2 Nd 0.2 Sm 0.2 Gd 0.2 Yb 0.2 ) 2 (Zr 0.75 Ce 0.25 ) 2 O 7 (LNSGY) nanopowders by the sol-gel technology. In addition, the LNSGY nanopowders were investigated by X-ray diffraction, Raman spectroscopy and transmission electron microscopy. Results show that LNSGY nanopowders have a typical defective fluorite structure. The average crystalline size of LNSGY nanopowders is approximately 15 nm. Meanwhile, the elemental composition of LNSGY nanopowders presents uniform distribution. This paper lays a foundation for high-performance high-entropy nanostructured feedstocks used for plasma spraying in the future.