Catalytic Carbothermal Reduction Synthesis and Mechanism of 3C-SiC from Diatomite with Fe as Catalyst

被引：0

作者：

Wang J. ^{[1
]}

Zhang Y. ^{[1
]}

Li S. ^{[1
]}

Ge S. ^{[1
]}

Song J. ^{[1
]}

Zhang H. ^{[1
]}

机构：

[1] The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan

来源：

Zhang, Haijun (zhanghaijun@wust.edu.cn) | 2018年 / Chinese Journal of Materials Research卷 / 32期

基金：

中国国家自然科学基金;

关键词：

3C-; SiC; Catalytic carbothermal reduction reaction; Density functional theory; Diatomite; Inorganic ceramic materials;

D O I：

10.11901/1005.3093.2017.533

中图分类号：

学科分类号：

摘要：

Nanopowders of 3C-SiC were synthesized at 1400°C for 3 h in Ar atmosphere via catalytic carbothermal reduction reaction method with industrial diatomite powders and phenolic resin as raw materials and ferric nitrate as catalyst precursor. XRD, SEM and TEM analysis were employed to characterize the phase composition and microstructure of the final products. The effect of temperature, catalyst content and holding time on the formation of the SiC powders was investigated. The results show that: 1) 3CSiC can be synthesized at 1400°C for 3 h with 1.0% (mass fraction) Fe as catalyst. In the contrast, for the case without Fe catalyst, only small amount of 3C-SiC was obtained in the final products under identical condition; 2) The as- prepared 3C- SiC nanopowders are granular in morphology, and the diameters of most particles are in nano- scales; 3) Density Functional Theory (DFT) calculation results further show that the Fe catalyst played important role in breaking the Si-O chemical bond. © All right reserved.

引用

页码：767 / 774

页数：7

共 19 条

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