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二氧化硅种子在硅溶胶粒径增长中的行为研究 被引量:3

Study on the Behavior of Silica Seed in the Particle Growing Process of Silica Sol
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摘要 文章描述了柱子在利用单质硅粉制备硅溶胶反应中的一般生长过程,分析表明采用种子生长法制备可控粒径的硅溶胶,其关键是通过反应条件的控制促使种子生长并抑制次生粒子的形成,通过次生粒子的定量计算可反映出体系的粒径分布情况。实验发现当二氧化硅种子浓度为1.5wt%时对硅溶胶粒径增长最为有利。同时利用水溶液中二氧化硅粒子的核/壳模型对种子生长过程的行为做出了合理解释。 The general growth process of the colloid particles was described in the preparation of silica sol by seed/silicon powder method, which indicated that silica sol of controllable size could be obtained: It was of vital importance to adjust reaction conditions to promote the growth of the seed particles and to oppress the formation of the secondary particles. The size distribution of silica sol could be estimated by calculation of secondary particles quantitatively. The experimental results showed that the average size of silica sol was best promoted when the concentration of seeds was 1.5wt%. The growth behavior of the seeds was interpreted by the shell/core model of colloid silica in aqueous medium reasonably.
作者 王丽君 王力
出处 《化工文摘》 2008年第1期36-37,40,共3页
关键词 二氧化硅种子 硅溶胶 次生粒子 核/壳模型 silica seed silica sol secondary particle shell/core model
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参考文献3

  • 1Zbigniew Adamczyk a> Barbara Jachimska and Marta Kolasia.Structure of colloid silica determined by viscosity measurements[].Journal of Colloid and Interface Science.2004
  • 2Laven J,,Stein H N.The electroviscous behavior of aqueous dispersions of amorphous silica[].Journal of Colloid and Interface Science.2001
  • 3Sang Mok Chang Minhyung Lee and Woo-Sik Kim.Preparation of large monodispersed spherical silica particles using seed particle growth[].Journal of Colloid and Interface Science.2005

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