【作者】 陈庆春； 邓慧宇； 周萍华； 王东；

【Author】 CHEN Qing-chun ,DENG Hui-yu , ZHOU Ping-hua , WANG Dong(Department of Materials Science and Engineering, East China Geological Institute,Linchuan 344000,China)

【机构】 华东地质学院材料科学与工程系；

【摘要】 研究了硅灰石制多孔SiO₂粉体的工艺变化如中和pH值,加表面活性剂时间、缩短总反应时间等对多孔SiO₂粉体产品产量及主要物性如比表面积、容重等的影响。研究表明,所得产品产量随中和pH值改变而呈现一定变化,在pH值为1.0时最小,后随pH值增大而提高;比表面积则在pH值为1.5时最小,pH值为3.0时最大,但均小于以前中和pH值为4.0时的比表面积而大于气相白炭水平;容重基本上随pH值增大而增大,但均小于0.30g/cm³。更多还原

【Abstract】 The effect of technologies change, for example, pH value, the time of adding surfactant,reducing total reaction time etc,to the production, specific surface area, volume weight and so on of porous silica powder made from wollastonite is studied. It shows that the production is the lowest when the pH value is between 1. 0 and 1.5, the specific surface area is the smallest whan the pH value is 1.5, highest when 3.0, but all smaller than that when pH value is 4. 0, however, higher than that of vapour silica white; the volume weight become larger and larger with the pH value rising on the whole, but all lower than 0.30 g/cm3.更多还原