1. Key Laboratory of Automobile Materials (Jilin University) of Education; School of Materials Science and Engineering; Jilin University; Changchun 130022 China
2. State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun 130022 P. R. China
3. University of Chinese Academy of Sciences; Beijing 100049 P. R. China