摘要
采用溶胶-凝胶法制备出草酸锌包覆碳化硅,研究了主盐浓度和陈化时间对包覆效果的影响。将摩尔比为1∶1.2的二水合乙酸锌与草酸分别加热溶于无水乙醇(Zn2+浓度为1.5mol·L-1);再将经预处理15min的SiC超声分散5min后,加入二水合乙酸锌的乙醇溶液中,并缓慢引流入草酸的乙醇溶液,在水浴加热75℃的条件下高速搅拌至湿凝胶的形成;陈化4h,干燥得草酸锌包覆碳化硅颗粒。借助高分辨透射电镜(HR-TEM)并结合能谱仪(EDS)分析表明,碳化硅颗粒分散于水合草酸锌凝胶中。
Sol-gel method was used to produce SiC particles coated with dihydrated zinc oxalate. The effect of main salt concentration and aging time on the coating was investigated. Dihydrated zinc acetate and oxalic acid are put into ethanol and heated to make ethanol solution of dihydrated zinc acetate and ethanol solution of oxalic acid respectivily, with their mol ratio of 1： 1.2 and Zn^2＋ concentration of 1.5mol · L^-1. SiC particles dispersed by ultrasonic for 5min and ethanol solution of oxalic acid are put into ethanol solution of dihydrated zinc acetate to make mixed solution. The mixed solution is stirred at high speed in a water-hath at 75℃ and then gelatin is formed. SiC particles coated with zinc oxalate are obtained by aging for 4h and dryness. It is shown by means of HRTEM and EDS that SiC particles are dispersed in the gel of dihydrated zinc oxalate.
出处
《粉末冶金技术》
CAS
CSCD
北大核心
2009年第2期86-90,共5页
Powder Metallurgy Technology
基金
江苏省自然科学基金项目(BK2007586)
江苏省博士后科研计划资助项目(0701012B)
关键词
SIC颗粒
溶胶-凝胶法
草酸锌
表征
SiC nanoparticles
sol-gel method
ZnC2 04
characterization
