Ultrafine SiO_(2 ) powders were prepared by High Gravity Reactive Precipitation method from water glass solutions and sulphuric acid.
2
以水玻璃和硫酸为原料，在超重力反应器中采用沉淀法合成了超细二氧化硅粉体。
Ultrafine silica powder was prepared in a rotating packed bed(RPB) reactor using water glass and sulfuric acid as raw materials.
3
本文主要研究了固化剂、纳米二氧化硅粉和碳酸钙粉等外加剂对硅橡胶模具线收缩率的影响。
The effects of solidified agent, nanometer silicon dioxide powder and calcium carbonate powder on line contraction percentage of silicon rubber mould were discussed in this paper.
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