Excellent hardening effect in lead-free piezoceramics by embedding local Cu-doped defect dipoles in phase boundary engineering

X Xinyue Qiu C Chao Wu D Daniel Q. Tan R Ruihong Liang C Chen Liu Y Yinchang Ma X Xi-xiang Zhang S Shiyang Wei J Junwei Zhang Z Zhi Tan (College of Materials Science and Engineering, Sichuan University 2 , Chengdu,) Z Zhipeng Wang (Institute of Nuclear and New Energy Technology, Tsinghua University) X Xiang Lv J Jiagang Wu (College of Materials Science and Engineering)