The precipitated silica is prepared by using liquid sodium silicate and sulfuric acid as raw materials at room temperature and modification agent TMCS is used for its surface modification.

以液体硅酸钠和硫酸为原料，在室温下反应合成沉淀白炭黑，并用三甲基氯硅烷（TMCS）对其进行表面改性。

youdao

But the composite modification material can not only improve the normal temperature strength of sodium silicate sand but also its collapsibility, so it is a relatively perfect modifier at present.

而作者开发的复合改性剂，既可提高水玻璃砂的常温强度，又可改善水玻璃砂的溃散性，是目前较为理想的改性剂。

youdao

The soluble salt modified sodium silicate has been studied. It compares the principles and technology of Ca and Al salts modification and identifies the Al salt modification technical process.

研究了可溶性金属盐改性钠水玻璃，比较了钙盐和铝盐改性的原理和技术要点，并确定了铝盐改性的工艺条件。

youdao