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高纯球形纳米SiO_2是一种具有诸多优越性能的新型材料,对于诸多行业产品的提档升级具有极其重要的意义。本文综述了纳米SiO_2的制备及改性方法,对各种方法进行了归纳和评价,并对其应用领域作了简要概括。通过研究表明,以粉石英为基本原料,采用溶胶-凝胶法制备的纳米SiO_2具有纯度高、球形度高、成本低等特点。
High purity spherical nano-SiO_2 is a kind of new material with many superior properties, which is extremely important for the upgrading of products in many industries. In this paper, the preparation and modification methods of nano-SiO_2 are summarized. Various methods are summarized and evaluated, and their applications are briefly summarized. The results show that nano-SiO2 prepared by sol-gel method has the characteristics of high purity, high sphericity and low cost, using powdered quartz as the basic raw material.