摘要
以硅粉和碳黑为初始原料,通过机械活化和化学活化预处理,实现了Si-C体系在较低温度下燃烧合成SiC．采用XRD、SEM．和EDS等手段,分析了合成产物的相组成和微观结构特征．结果表明:机械活化预处理可使燃烧反应诱发温度降低至1050℃,合成SiC粉体的比表面积为4．36 m2／g,平均粒径<5μm．
Mechanical-activation-assisted combustion synthesis of SiC was conducted with PVC and/or NH4Cl as promoters. The mechanical activation of the Si-C reactants through high-energy attrition milling results in substantial decrease of the ignition temperature and the incubation time for the Si-C combustion reaction. Ultra-fine β-SiC powders with equiaxed grains can be synthesized at the preheating temperature as low as 1050℃. The specific surface area （SSA） of the combustion synthesized SiC powders is 4.36m^2/g, and the average particle size is less than 5μm.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第2期263-267,共5页
Journal of Inorganic Materials
基金
国家自然科学基金(50372074)
