| Study on Microstructure of Silica by Infrared Spectroscopy and Raman Spectroscopy |
| Received:May 07, 2021 Revised:May 07, 2021 |
| DOI：10.12136/j.issn.1000-890X.2022.08.0623 |
| Key Words: precipitated silica；fumed silica；infrared spectroscopy；Raman spectroscopy；microstructure；hydroxyl |
| Author Name | Affiliation | E-mail | | JIANG Huabo* | Zhuoyuetai Precision（Qingdao） Technology Co.，Ltd | cuilicao@126.com | | CAO Cuiling | 1.Zhuoyuetai Precision（Qingdao） Technology Co.，Ltd
2. Qingdao Superlative Innovative Technology Co.，Ltd | |
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| Abstract: |
| Abstract：The microstructures of the precipitated silica and fumed silica were analyzed by infrared
spectrum and Raman spectrum. The results showed that，compared with the fumed silica，the surface hydroxyl
content of the precipitated silica was higher，the surface of the precipitated silica without heat treatment was
covered by bound water molecules，and with the increase of treatment temperature，the water molecules bound
to the hydroxyl groups on the surface of the precipitated silica were removed，and then the hydroxyl group
condensation reaction occurred，until finally all the hydroxyl groups were lost，and a Si—O—Si network
structure was formed. On the other hand，the existence of the hydroxyl groups could be clearly observed on
the surface of the fumed silica without heat treatment，and the treatment temperature had no obvious effect
on the structure of the fumed silica. This might be attributed to the different manufacturing process of the
precipitated silica and fumed silica. |
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