铝热剂对钡铁氧体空心陶瓷微珠合成反应的影响  

Effect of Thermite on Synthesis of Barium Ferrite Hollow Ceramic Microspheres

作　　者：王建江[1] 娄鸿飞[1] 许宝才[1] 侯永伸[1] 

机构地区：[1]军械工程学院先进材料研究所,石家庄050003

出　　处：《硅酸盐学报》2015年第12期1737-1741,共5页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(51172282);武器装备预研基金(9140A120 40211JB34)资助

摘　　要：以Fe–Fe2O3–Ba CO3为主配系、铝热剂(Al-Ti O2)为副配系组成反应体系,采用自反应淬熄技术结合热处理工艺,制备了钡铁氧体空心陶瓷微珠。借助于扫描电子显微镜、X射线衍射、高速摄影技术与综合热分析法,研究了铝热剂对钡铁氧体空心陶瓷微珠合成反应的影响。结果表明,铝热反应的引入,不会对空心微珠各个反应阶段产生大的影响,也不会改变空心微珠的成球率与空心率,但会引起空心微珠形貌改变和出现非晶结构。铝热剂的引入,提高了粒子反应活性,增加了体系的反应放热量,这有助于空心陶瓷熔滴的形成。同时,超大过冷度也使得空心微珠的相组成出现非晶结构。铝热剂的引入,导致体系反应放热量增大,是引起空心微珠形貌改变和出现非晶结构的直接原因。Based on the self-reactive quenching technology combined with heat treatment process, adopting Fe–Fe2O3–BaCO3 as themajor reactive system and thermite （Al-TiO2） as the minor reactive system, the barium ferrite hollow ceramic microspheres areprepared. Adopting the scanning electron microscop, X-ray diffraction, high-speed photography and comprehensive thermal analysismethod, the effects of thermite on synthesis of barium ferrite hollow ceramic microspheres are studied. The various effect of thermiteon the formation of hollow ceramic microspheres the could not be find from the experimental result.But the effect of thermite on theformation of amorphous substance and the morphology of hollow ceramic microspheres the could be find from the experimentalresult. The reactivity of the powders is improved and the output of heat of reactive system is inscreased by introduction of thermite,which is conductive to the formation of ceramic meltondrop. The formation of the amorphous structure is due to the increase ofdegree of super-cooling. According to results of this study, the introduction of thermite is the reason of formation of the amorphousstructure, by increasing output of heat of reactive system.

关 键 词：自反应淬熄法 钡铁氧体空心陶瓷微珠 铝热剂 放热量 

分 类 号：TB333[一般工业技术—材料科学与工程]