1. Anhui Key Laboratory of Advanced Building Materials School of Materials Science and Chemical Engineering Anhui Jianzhu University Hefei 230601 P. R. China
2. New Energy Research Center Research Institute of Petroleum Exploration and Development (RIPED) Beijing 10083 P. R. China
3. CAS Key Laboratory for Mechanical Behavior and Design of Materials University of Science and Technology of China Hefei 230026 P. R. China