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首页> 外文会议>第七届国际耐火材料学术会议（ISR2016）论文集 >Influence of Different Gelling Agents on the Change of Chemical Bond of Colloidal Silica
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Influence of Different Gelling Agents on the Change of Chemical Bond of Colloidal Silica

机译：不同胶凝剂对胶态二氧化硅化学键变化的影响

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摘要

Colloidal silica bonded refractory castable has not been widely applied as its demoulding strength is low.Relevant studies have suggested that the addition of gelling agents could increase its demoulding strength, because of its role in the formation of siloxane (Si-O-Si) during the coagulation.This work aims to study the relationship between demoulding strength and the change of chemical bonds of the particles of colloidal silica with and without gelling agents.The influence of different gelling agents (calcium aluminate cement and magnesia) on the chemical bond changes of the colloidal silica (solid content of 30％) has been investigated during the dehydration condensation reaction.The chemical bonds of the particles and phase transformation of colloidal silica are investigated by Fourier Transform Infrared Spectroscopy (FT-IR) and X-Ray Diffraction (XRD).The experiment results show that the addition of gelling agents promotes the condensation reaction between the particles of colloidal silica, and the introduction of the cations (Ca2+, Al3+, Mg2+) results in the condensation reaction of colloidal silica,forming a three-dimensional network structure, thus increasing the demoulding strength of the castable.
机译：胶态二氧化硅粘结的耐火浇注料由于其脱模强度低而尚未得到广泛应用。相关研究表明，添加胶凝剂可以提高其脱模强度，因为它在形成过程中会形成硅氧烷（Si-O-Si）。这项工作旨在研究脱胶强度与有无胶凝剂时胶体二氧化硅颗粒化学键变化之间的关系。不同胶凝剂（铝酸钙水泥和氧化镁）对胶凝剂化学键变化的影响。在脱水缩合反应中研究了固含量为30％的胶态二氧化硅。通过傅立叶变换红外光谱（FT-IR）和X射线衍射（XRD）研究了胶态二氧化硅的颗粒化学键和相变。实验结果表明，胶凝剂的加入促进了胶体颗粒之间的缩合反应。二氧化硅，阳离子（Ca2 +，Al3 +，Mg2 +）的引入导致胶体二氧化硅的缩合反应，形成三维网络结构，从而提高了浇铸料的脱模强度。

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  • 作者

    GUO Bin; LI Huanhuan; ZHANG Yaqian; YIN Yiming; ZHANG Yang; YE Guotian;

  • 作者单位

    Henan Key Laboratory of High Temperature Functional Ceramics,School of Materials Science and Engineering,Zhengzhou University,Zhengzhou,450001,China;

    Henan Key Laboratory of High Temperature Functional Ceramics,School of Materials Science and Engineering,Zhengzhou University,Zhengzhou,450001,China;

    Henan Key Laboratory of High Temperature Functional Ceramics,School of Materials Science and Engineering,Zhengzhou University,Zhengzhou,450001,China;

    Henan Key Laboratory of High Temperature Functional Ceramics,School of Materials Science and Engineering,Zhengzhou University,Zhengzhou,450001,China;

    Henan Key Laboratory of High Temperature Functional Ceramics,School of Materials Science and Engineering,Zhengzhou University,Zhengzhou,450001,China;

    Henan Key Laboratory of High Temperature Functional Ceramics,School of Materials Science and Engineering,Zhengzhou University,Zhengzhou,450001,China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学工业;冶金工业;
  • 关键词

    colloidal silica; gelling agent; chemical bond;

    机译：胶体二氧化硅；胶凝剂；化学键;

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