摘要
以正硅酸乙酯(TEOS)、蔗糖、无水乙醇等为原料,通过溶胶-凝胶、微波碳热还原的方法合成SiC超细粉。研究了合成SiC超细粉的工艺条件。使用FE-SEM和XRD对合成的超细粉进行了表征。结果表明:硅碳摩尔比对SiC的合成有一定影响。1573 K可以合成高纯SiC超细粉。适当延长合成时间有利于SiC超细粉的合成。FE-SEM和比表面积的结果表明,合成SiC超细粉的粒度在100 nm以下。
SiC ultrafine powder was prepared from tetraethoxysilane（TEOS）, sugar and anhydrous alcohol by sol-gel and microwave carbothermal reduction method. The influence of carbon content, reaction temperature and soaking time on the synthesis of SiC was studied. XRD and FE-SEM were used to characterize the powder. Results showed that the ratio of Si and C had significant effects on the formation of SiC. SiC powder was formed at 1573 K and the formation of SiC was favored with prolonged synthesis time. FE-SEM and specific surface area measurements showed the crystalline size of the prepared SiC was less than 100 nm.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2008年第A01期153-155,共3页
Rare Metal Materials and Engineering
基金
"十一五"国家科技支撑计划项目资助(2006BAB12B00)
河南省杰出青年科学基金项目资助(0512002400)
关键词
碳化硅
超细粉
微波碳热还原
silicon carbide
ultrafine powder
microwave corbothermal reduction method
