Microscopic structure of nanometer-sized silica particles
Microscopic structure of nanometer-sized silica particles
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DOI：
10.1103/physrevb.69.155409
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发表时间：
2004-04-01
影响因子：
3.7
通讯作者：
Aoki, K
中科院分区：
文献类型：
--
作者：
Uchino, T;Aboshi, A;Aoki, K
我们已经研究了纳米尺寸的二氧化硅颗粒的结构称为气相二氧化硅，这是一种合成的无定形二氧化硅，通过在氧-氢火焰中燃烧四氯化硅，使用红外和拉曼光谱和高能X射线衍射方法。结果表明，气相法二氧化硅的结构与普通块体二氧化硅玻璃的结构不同，特别是二氧化硅环的尺寸分布不同。三元环和四元环在气相二氧化硅中比在块状二氧化硅玻璃中更常见。研究还表明，气相二氧化硅的网络结构比本体结构更灵活，这可能解释了气相二氧化硅在结构中可以容纳大量三元环和四元环的原因。
We have studied the structure of nanometer-sized silica particles called fumed silica, which is a synthetic amorphous silicon dioxide produced by burning silicon tetrachloride in an oxygen-hydrogen flame, using infrared and Raman spectroscopies and a high-energy x-ray diffraction method. It has been demonstrated that the structure of fumed silica is not identical to that of the normal bulk silica glass in terms especially of the distribution of the size of silica rings. Three- and four-membered rings are more frequent in fumed silica than in the bulk silica glass. It has also been shown that the network structure of fumed silica is more flexible than that of the bulk one, probably explaining the reason why fumed silica can accommodate a large number of three- and four-membered rings in the structure.