Preparation and growth mechanism of mono-disperse spherical SiO<sub>2</sub> powder

申晓毅

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Preparation and growth mechanism of mono-disperse spherical SiO₂ powder

更新时间：2025-12-10

- Preparation and growth mechanism of mono-disperse spherical SiO₂ powder
- CIESC Journal Issue 12, (2010)
- 作者机构：
  
  东北大学材料与冶金学院,辽宁,沈阳,110004
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 December 2010，
  
  Published：05 December 2010
- 稿件说明：
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申晓毅. Preparation and growth mechanism of mono-disperse spherical SiO₂ powder[J]. CIESC Journal, 2010, (12).
DOI：

申晓毅. Preparation and growth mechanism of mono-disperse spherical SiO₂ powder[J]. CIESC Journal, 2010, (12). DOI：

摘要

以正硅酸乙酯为原料，在超声波作用下采用醇盐水解法制备了超微SiO2粉体，并采用XRD、SEM、FT-IR和DTA研究了SiO2样品的物相、微观形貌、基团结构和热稳定性。结果表明，超微SiO2粉体为规则的单分散球形非晶态颗粒、粒度均匀、粒径范围窄。样品中含有大量羟基，可加热脱除。SiO2粉体在1150℃发生晶形转变，1200℃转变完成，生成方石英晶相。通过在制备过程不同阶段取样测试，分析了球形SiO2颗粒的生长机理。

Abstract

With Si(OC2H5)4 as raw material

ultrafine SiO2 powder was prepared by the alkoxide-hydrolysis method under ultrasonic irradiation.XRD

SEM

FT-IR and DTA were used to characterize the phase

micro-morphology

functional group structure and thermal stability of SiO2 powder.The results indicated that the regular mono-disperse ultrafine spherical SiO2 particles were amorphous with uniform size and narrow size distribution.There existed much hydroxyl in SiO2 powder

which could be eliminated by calcining.The crystal form began to transform to cristobalite at 1150℃

and transformation was completed at 1200℃.The growth mechanism of SiO2 particle was also discussed by observing the morphologies of samples at different stages of the preparation process.

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Preparation and growth mechanism of mono-disperse spherical SiO2 powder

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Preparation and growth mechanism of mono-disperse spherical SiO₂ powder