1. School of Materials Science and Engineering
2. Shijiazhuang Tiedao University
3. Shijiazhuang
4. China
5. Hebei Key Lab of Optic-electronic Information and Materials
6. State Key Lab. of High Performance Ceramics and Superfine Microstructure
7. The College of Physics Science and Technology
8. Hebei University
9. Baoding 071002