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介绍了以Na2O-B2O3-SiO2玻璃为原料,采用熔融法制备钠硼硅玻璃,并通过对钠硼硅玻璃的组分,熔制温度的讨论,以及对热处理,酸浸析等后处理过程工艺参数进行调节,得到制得纳米SiO2颗粒的最优化条件。采用差示扫描量热法对热处理前的钠硼硅玻璃进行测试,用X射线衍射分析对不同温度热处理的钠硼硅进行测试,用场发射扫描电子显微镜对酸浸析后二氧化硅颗粒形貌进行表征,并对最佳的工艺条件进行了讨论。制得的SiO2颗粒粒径范围为60～100 nm,并具有比表面积大、分散性好、成本低等优点。
This paper introduces Na2O-B2O3-SiO2 glass as raw material, and prepares sodium borosilicate glass by the melting method. Through the discussion of the composition and melting temperature of sodium borosilicate glass, as well as the post-treatment process such as heat treatment and acid leaching Parameters were adjusted to obtain the optimal conditions for obtaining nano-SiO2 particles. The sodium borosilicate glass before heat treatment was tested by differential scanning calorimetry, and the sodium borosilicate heat-treated at different temperatures was tested by X-ray diffraction. The morphology of acid leached silica particles was characterized by field emission scanning electron microscopy Characterization, and the best conditions for the process were discussed. The prepared SiO2 particles have a size range of 60-100 nm, and have the advantages of large specific surface area, good dispersibility and low cost.