Rapid carbothermic synthesis of silicon carbide nano powders by using microwave heating

被引：82

作者：

Moshtaghioun, B. M. ^{[1
,3
]}

Poyato, R. ^{[2
]}

Cumbrera, F. L. ^{[1
]}

de Bernardi-Martin, S. ^{[1
]}

Monshi, A. ^{[3
]}

Abbasi, M. H. ^{[3
]}

Karimzadeh, F. ^{[3
]}

Dominguez-Rodriguez, A. ^{[1
]}

机构：

[1] Univ Seville, Dept Condensed Matter Phys, Seville, Spain

[2] Univ Seville, CSIC, Mat Sci Inst Sevilla, Seville, Spain

[3] Isfahan Univ Technol, Dept Mat Engn, Esfahan, Iran

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2012年 / 32卷 / 08期

关键词：

Microwave processing; Milling; X-ray methods; SiC; Nano powders synthesis; MECHANICAL-ACTIVATION; COMBUSTION SYNTHESIS; SIC POWDER; REDUCTION; NANOPOWDERS; WHISKERS; PLASMA; GEL;

D O I：

10.1016/j.jeurceramsoc.2011.12.021

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This paper reports an improved procedure for synthesis of silicon carbide nanopowders from silica by carbothermic reduction under fast microwave-induced heating. The powders have been prepared by direct solid-state reaction in a 2.45 GHz microwave field in nitrogen atmosphere after 40 h milling. For the first time, the formation of silicon carbide (beta-SiC) as a major phase can be achieved at 1200 degrees C in 5 min of microwave exposure, resulting in nano sized particles ranging from 10 to 40 nm under optimized synthesis condition. The Rietveld quantitative phase-composition analysis confirmed that the major SiC polytype is cubic SiC (beta-SiC) with 98.5(4) weight fraction and the remained is minor hexagonal SiC polytypic (alpha-SiC) phases. Therefore this method is the most efficient one for SiC powder synthesis in terms of energy and time saving as well as preparation of SiC nano powders. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：1787 / 1794

页数：8

共 32 条

[1] Influence of pellet composition and structure on carbothermic reduction of silica [J].