1. School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, China
2. Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices, Inner Mongolia University of Science and Technology, Baotou 014010, China
3. Key Laboratory of Green Extraction & Efficient Utilization of Light Rare-Earth Resources, Ministry of Education, Inner Mongolia University of Science and Technology, Baotou 014010, China
4. School of Rare Earth Research and Development, Inner Mongolia University of Science and Technology, Baotou 014010, China