Structural special features in nanodispersed Ni-SiO2 composite materials produced by method of chemical dispersion

被引：12

作者：

Kuznetsov D.V. ^{[1
]}

Lysov D.V. ^{[1
]}

Levina V.V. ^{[1
]}

Kondrat'eva M.N. ^{[1
]}

Ryzhonkov D.I. ^{[1
]}

Kaloshkin S.D. ^{[1
]}

机构：

[1] Moscow Institute of Steel and Alloys, Moscow

来源：

Inorganic Materials: Applied Research | 2010年 / 1卷 / 01期

关键词：

Composite powders; Method of chemical dispersion; Nanopowders; Studies; Synthesis;

D O I：

10.1134/S2075113310010090

中图分类号：

学科分类号：

摘要：

The method of chemical dispersion with the use of inexpensive and available initial components is applied to obtain nanodispersed composite powders based on nickel and silicon oxide of various composi-tions. The methods of X-ray diffraction, electron microscopy, thermogravimetry, and low-temperature adsorption are used to determine the optimum modes of obtaining nanopowders as well as the dependence of their structure and dispersion ability on composition and conditions of metallization. It is shown that the increase in silicon oxide content in samples up to 30 wt % leads to almost complete suppression of the process of sintering and recrystallization of nickel particles at temperatures of 500-600°C. The microscopic studies make it possible to establish that temperature stability of the material is provided by the presence of a gas-permeable envelope of silicon oxide nanoparticles on the surface of nickel particles. The results show that these materials are promising for use as catalysts in various fields, including the processes of synthesis of car-bon nanomaterials by the method of catalytic pyrolysis of methane. © Pleiades Publishing, Ltd., 2010.

引用

页码：57 / 63

页数：6

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