Rare earth Er3+doped(Sm1-xErx)2Zr2O7(x=0.1,0.2,and 0.3)ceramic samples were synthesized using a solid state reaction method.The microstructure and thermal properties of these ceramics were inves-tigated to evaluate their potential as thermal barrier coating materials.The results show that ceramics are compact with regular-shaped grains of 1-5 μm size.(Sm1-xErx)2Zr2O7 has a pyrochlore structure mainly determined by ionic radius ratio,but the ordering degree decreases with increase of the Er2O3 content.There is no phase transformation from 1000 to 1200℃,and the(Sm1-xErx)2Zr2O7 ceramics exhibit excellent phase stability during thermal treatment at 1200℃for 100 h and 1400℃for 50 h.The thermal conductivities of dense(Sm1-xErx)2Zr2O7 ceramics range from 1.52 to 1.59 W/(m-K),which is lower than that of Sm2Zr2O7,and decrease as the Er2O3 content increases.Besides,the thermal expansion coefficient of(Sm1-xErx)2Zr2O7 is higher than that of Sm2Zr2O7.

School of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou 014010,China;Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices,Baotou 014010,China

[1]Min Xie;Shengli An;Xiwen Song;Jinxiao Bao;Fen Zhou-.Effects of Er3+doping on structure and thermal properties of(Sm1-xErx)2Zr2O7 ceramics for thermal barrier coating)[J].稀土学报（英文版）,2022(12):1920-1926

Er3+doping,Sm1,Er3+doped

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