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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Investigation of the systems silica and silica containing chromium in alcohol medium
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Investigation of the systems silica and silica containing chromium in alcohol medium

机译：醇介质中二氧化硅和含铬二氧化硅的体系研究

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摘要

The purpose of this work is to obtain micrometer sized spherical particles of silica and silica-chromium from sodium silicate. Spherical particles were prepared by sol-gel method from hydrolysis to polycondensation of aqueous sodium silicate in alcohol medium. Chromium was added to the system for some samples. Compositions and morphologies were achieved by changing the preciptitation agent. X-ray diffractometry, electrophoretic mobility, infrared spectroscopy and scanning electron microscopies were carried out on these particles to identify phases, determine particle mobility morphology, particle sizes, shapes and order at short distance. Non-crystalline silica particles with spherical shapes and micrometric size were obtained. The surface potentials of the silica particles differed from that of the silica-chromium particles.
机译：这项工作的目的是从硅酸钠中获得微米级的二氧化硅和二氧化硅铬的球形颗粒。通过溶胶-凝胶法，从硅酸钠水溶液在醇介质中水解到缩聚反应制备球形颗粒。对于某些样品，将铬添加到系统中。组成和形态是通过改变沉淀剂来实现的。在这些粒子上进行了X射线衍射，电泳迁移率，红外光谱和扫描电子显微镜检查，以鉴定相，确定粒子迁移率形态，粒径，形状和近距离有序。获得具有球形和微米尺寸的非结晶二氧化硅颗粒。二氧化硅颗粒的表面电势与二氧化硅铬颗粒的表面电势不同。

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