1. National Engineering Laboratory for High-Efficiency Recovery of Refractory Nonferrous Metals, School of Metallurgy and Environment, Central South University, Changsha 410083, P. R. China
2. National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan, ROC
3. School of Materials Science & Engineering, Peking University, Beijing 100871, P. R. China
4. Special Glass Key Lab of Hainan Province, School of Materials Science and Engineering, Hainan University, Haikou 570228, China
5. School of Chemistry, South China Normal University, Guangzhou 510006, P. R. China
6. Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, P. R. China