1. Engineering Research Center of Conducting Materials and Composite Technology Ministry of Education Shaanxi Engineering Research Center of Metal‐Based Heterogeneous Materials and Advanced Manufacturing Technology Shaanxi Province Key Laboratory for Electrical Materials and Infiltration Technology School of Materials Science and Engineering Xi'an University of Technology Xi'an Shaanxi 710048 P. R. China
2. Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes School of Materials Science and Technology China University of Geosciences Beijing 100083 P. R. China