Facile synthesis of high-entropy zirconate nanopowders and their sintering behaviors

The challenge in synthesizing high-entropy ceramic (HEC) nanopowders is to suppress severe grain coarsening and particle agglomeration, which occur at elevated temperatures. This could be addressed by the polyacrylamide gel method. In this work, single-phase (La0.2Nd0.2Sm0.2Gd0.2Yb0.2)2Zr2O7 (La0.2Nd0.2Y0.2Eu0.2Gd0.2)2Zr2O7 without agglomeration were successfully synthesized using method for first time. results showed that phase composition, size, degree of greatly influenced molar ratio acrylamide (AM)/Zr calcination temperature. These as-synthesized zirconate (HEZ) sintered into fully dense ceramics 1500 ? 2 h. HEZ a transformation from defect-fluorite pyrochlore with increase sintering Additionally, two-step these was conducted, fine grains prepared. simple easily operated, facile approach producing HEC excellent sinterability.