摘要
基于重力分离SHS法制备陶瓷内衬复合弯管 ,研究了氧化铁粉末化学组成对SHS复合弯管内衬陶瓷的影响。研究发现 :在加入相同质量分数铝热剂条件下 ,存在于工业原料Fe2 O3粉末中的杂质对燃烧过程的稀释效应比SiO2 添加剂更为强烈 ;在工业原料Fe2 O3+Al体系中加入适量的Fe3O4+Al体系 ,使燃烧温度、蔓延速率及SHS反应转化率均有所提高 ;但加入过量的Fe3O4+Al体系 ,虽可使蔓延速率进一步增大 ,却引起燃烧温度和SHS反应转化率有所下降。实验表明 ,在工业原料Fe2 O3+Al体系中加入 15%的Fe3O4+Al体系 ,可使复合弯管内衬陶瓷性能达到并超过用分析纯Fe2 O3+Al体系所制备的复合弯管内衬陶瓷性能。
On basis of using gravitational separation SHS method to produce curved ceramiclined composite pipes,influences of Fe_2O_3 powder chemical composition on lined ceramics of SHS curved composite pipes have been investigated.It was found that the dilution effect of impurity in Fe_2O_3 raw powder was increased compared with that of SiO_2 additive under adding the same mass fraction of thermit.A suitable addition of Fe_3O_4+Al system to the Fe_2O_3+Al system could cause combustion temperature,propagating rate and SHS transformation rate to be increased,whereas the addition of Fe_3O_4+Al system in the Fe_2O_3+Al system was beyond certain value,the combustion temperature and SHS transformation rate could be reduced though propagating rate was increased further.It was demonstrated from the experiment that as adding Fe_3O_4+Al system with 15% addition in the raw Fe_2O_3+Al system,properties of lined ceramics of curved composition pipes could reach or exceed ones of that produced with chemically pure Fe_2O_3+Al system.
出处
《铸造》
EI
CAS
CSCD
北大核心
2000年第4期189-193,共5页
Foundry
基金
国家自然科学基金!资助项目 ( 59972 0 4 3 )
关键词
陶瓷内衬复合弯管
燃烧特性
氧化铁粉末
SHS
gravityseparated SHS process
curved composite pipes lined synthesizing ceramics
combustion characteristics
ironoxide powder
