1. Li Suying, Qian Haiyan, “Preparation methods and application actuality of silica white,” Inorganic Chemicals Industry, 2008, 40 (1): 8–11.
2. Z.J. Zhang, “research on extraction of alumina and other useful resources from high aluminum fly ash,” (Ph.D. thesis, northwest university, 2007.5).
3. Mu Wenning, Zhai Yuchun, Liu Yan, “Extraction of silicon from laterite-nickel ore by molten alkali,” The Chinese Journal of Nonferrous Metals, 2009, 19 (3): 570–575.
4. Liu Hai-di, Jia Hong, Guo Fen, et al, “Preparation of silica SiO2 utral-fine powder by higee technology,” Inorganic Chemical Industry,2003,35(1): 13–15.
5. Jilai Xue, Shaohua Li, Jun Zhu, Baoping Song, “effects of power ultrasound on precipitation process of sodium aluminate solutions,” Light Metals 2006, 169–172