1. Y. Kuwahara, T. Ohmichi, T. Kamegawa, K. Mori, and H. Yamashita, J. Mater. Chem. 20, 5052 (2010).
2. F. Valighazvini, F. Rashchi, and R. Khayyam Nekouei, Ind. Eng. Chem. Res. 52, 1723 (2013).
3. X. Liu and Z. Sui, China Nonferrous Met. 12, 1281 (2002).
4. Y. Xiong, C. Li, B. Liang, and J. Xie, Chin. J. Nonferrous Met. 18, 557 (2008).
5. Z. Huang, M. Wang, X. Du, and Z. Sui, J. Mater. Sci. Technol. China 19, 191 (2003).