Nano-silica white was prepared from salt system containing silica,Al3+ and Mg2+,in this preparation process some dispersant and surface modifying agent were applied and ammonia was used to adjust the pH of the solution.
利用含镁、铝盐的有盐硅酸体系,以氨水调节其pH,加入分散剂及表面改性剂,制备出平均粒径为60nm左右的白炭黑样品,通过此体系的pH值与所制样品比表面积的关系,探讨了有盐体系中硅酸的聚合机理,发现:当pH<3。
Nano-silica white was prepared from salt system containing silica, Al3+ and Mg2+, in this preparation process some dispersant and surface modifying agent were applied and ammonia was used to adjust the pH of the solution.
利用含镁、铝盐的有盐硅酸体系,以氨水调节其pH,加入分散剂及表面改性剂,制备出平均粒径为60nm左右的白炭黑样品,通过此体系的pH值与所制样品比表面积的关系,探讨了有盐体系中硅酸的聚合机理,发现:当pH<3。