Preparation of (La0.2Nd0.2Sm0.2Gd0.2Er0.2)2Zr2O7 High-entropy Transparent Ceramics by Vacuum Sintering

(La 0.2 Nd 0.2 Sm 0.2 Gd 0.2 Er 0.2 ) 2 Zr 2 O 7 1 , 1,2 , 1 , 1 , 1 , 1 ( 1. ; 2. , 621010) : , (La 0.2 Nd 0.2 Sm 0.2 Gd 0.2 Er 0.2 ) 2 Zr 2 O 7 8 nm,