Polymerization behavior of silicic acid with coexisting magnesium and aluminum ions

SHEN Xingmei; LI Liaosha; WU Xingrong; WANG Ping; LUO Tao

doi:10.3969/j.issn.0438-1157.2014.03.047

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Polymerization behavior of silicic acid with coexisting magnesium and aluminum ions

更新时间：2025-12-10

- Polymerization behavior of silicic acid with coexisting magnesium and aluminum ions
- CIESC Journal Issue 3, Pages: 1104-1110(2014)
- 作者机构：
  
  安徽工业大学教育部冶金减排与资源综合利用重点实验室,安徽,马鞍山,243002
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2014.03.047
  CLC： Q170.9
- Online First：05 March 2014，
  
  Published：05 March 2014
- 稿件说明：
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SHEN Xingmei, LI Liaosha, WU Xingrong, et al. Polymerization behavior of silicic acid with coexisting magnesium and aluminum ions[J]. CIESC Journal, 2014, (3): 1104-1110.
DOI：

SHEN Xingmei, LI Liaosha, WU Xingrong, et al. Polymerization behavior of silicic acid with coexisting magnesium and aluminum ions[J]. CIESC Journal, 2014, (3): 1104-1110. DOI： 10.3969/j.issn.0438-1157.2014.03.047.

摘要

通过对镁铝离子共存硅酸体系中硅酸胶凝时间、单硅酸聚合反应速率以及凝胶热性能的研究，得出：在pH0.1+0.1硅酸体系的单硅酸平均速率常数为：k0=7.28×10-4，k1=5.62×10-4。镁铝离子共存硅酸体系凝胶的晶化转变温度与晶型转变温度，相较于不含金属离子硅酸体系的均有所降低，根据热重曲线计算出MA0.1+0.1硅酸体系水合二氧化硅的化学式为：SiO2·0.556 H2O。

Abstract

Gel time

polymerization rate of monosilicic acid

and thermal performance of gel of silicic acid system with coexisting Mg2+ and Al3+ ions were investigated. At pH<4

gel time of silicic acid system decreased with the increase of coexisting concentration of Mg2+ and Al3+ ions

and Al3+ ions played an important role in the coagulation process. Polymerization reaction rate constant of monosilicic acid

for silicic acid system with coexisting Mg2+ and Al3+ ions

was higher than that for silicic acid without metallic ions

and average rate constant for MA0.1+0.1 system was k0=7.28×10-4

k1=5.62×10-4. Crystallization temperature and crystal transformation temperature of silicic acid system with coexisting Mg2+ and Al3+ ions were lower than those of silicic acid without metallic ions

and chemical formula of hydrated silicon dioxide for MA0.1+0.1 system calculated by TG curve was SiO2·0.556 H2O.

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