1. State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of Technology Luoshi Road 122 Wuhan 430070 P. R. China
2. State Key Laboratory of Silicate Materials for ArchitecturesWuhan University of Technology Luoshi Road 122 Wuhan 430070 P. R. China
3. Materials Science and Engineering DepartmentUniversity of Washington Seattle WA 98195‐2120 USA
4. Department of Materials Science and EngineeringStanford University Stanford CA 94305 USA
5. Faculty of Material Science and ChemistryChina University of Geosciences 388 Lumo Road Wuhan 430074 P. R. China