Microsilica is a sort of tiny pozzolana with high-active silicon dioxide.

硅灰是一种极细的火山灰质的高活性二氧化硅。

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The acid leaching residue is studied by X ray diffraction analysis and IR spectrometry and the results show that it mainly consists of active silicon dioxide.

酸浸渣经X-射线衍射和红外光谱分析表明，其主要成分为具有活性的二氧化硅。

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The experiment, the preparation of the active silicon oxide and the test of properties, is designed for the inorganic chemical experiment in Department of Chemistry.

本文介绍的活性二氧化硅的制备及性质实验是为化学专业无机化学实验课而设计的一个综合性实验。

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