摘要
通过重力分离 SHS法制备陶瓷内衬煤粉喷枪 ,研究了 Fe2 O3粉末性能 (纯度、粒度和表面状态 )对合成 SHS煤粉喷枪内衬陶瓷的影响。结果表明 ,在铝热剂中相同质量百分数条件下 ,工业纯 Fe2 O3粉末中的杂质比 Si O2 添加剂对燃烧过程中的稀释效应更为强烈 ;降低 Fe2 O3粒度虽使蔓延速率下降 ,但却使燃烧温度和 SHS反应转化率提高 ;对工业纯 Fe2 O3粉末进行 1 50°C烘干处理 ,燃烧温度、蔓延速率与反应转化率随烘干时间增加而增大。
On basis of using gravitational separation SHS method to produce ceramic- lined coal- dust spurting guns,influences of Fe2 O3powder properties such as purity,particle size and surface condition on synthesizing lined ceramics of SHS coal- dust spurting guns have been investigated.It was found that the dilutiion effect of impurity in Fe2 O3powder was increased compared with one of Si O2 additive under same mass fraction in thermit.Reducing Fe2 O3particle size caused propagation rate to be reduced,but caused combustion temperature and SHS reaction transformation rate to be increased.Through stoving treatment on raw Fe2 O3powder under 1 50° C,combustion temperature,propagation rate and reaction transformation rate were increased with increasing stoving time.
出处
《机械工程材料》
CAS
CSCD
北大核心
2000年第5期29-32,共4页
Materials For Mechanical Engineering
基金
国家自然科学基金资助项目! (59972 0 4 3)
