含尖晶石空心球的刚玉-尖晶石材料制备及性能  

Preparation and properties of corundum-spinel materials containing spinel bubbles

作　　者：刘浩[1] 刘文元 王玺堂[1] 王周福[1] 冯钢军 齐跃坤 LIU Hao;LIU Wenyuan;WANG Xitang;WANG Zhoufu;FENG Gangjun;QI Yuekun(The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;Henan Hecheng Inorganic New Materials Co.,Ltd.,Kaifeng 475199,Henan,China)

机构地区：[1]武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北武汉430081 [2]河南和成无机新材料股份有限公司,河南开封475199

出　　处：《钢铁研究学报》2022年第1期52-57,共6页Journal of Iron and Steel Research

基　　金：国家自然科学基金资助项目(U20A20239,51672195);国家级大学生创新创业训练计划资助项目(202110488002);武汉科技大学国防预研基金资助项目(GF201909)。

摘　　要：采用电熔-喷吹法制备了镁铝尖晶石空心球,结合空心球结构与性质特征,将其引入刚玉-尖晶石材料,对比研究了不同粒径空心球对材料显微结构、力学强度及隔热能力的影响。结果表明:制备的空心球球形度高,球壁由单层或多层镁铝尖晶石晶粒镶嵌结合而成,球体的抗压能力取决于球壁厚度及其均匀性。降低粒径、引入复合粒径空心球,通过球体之间的填充,降低了刚玉-尖晶石材料的孔隙尺寸、提高了力学强度;控制不同粒径空心球的引入,降低球体之间"点接触"的概率,有利于提高材料的隔热能力。Magnesium aluminate spinel bubbles were prepared by electrofusion-injection process.And the effects of various bubbles with different particle sizes on the microstructure,mechanical strength and thermal insulation capacity of corundum-spinel materials were studied systematically.The results show that the prepared bubbles possessed high sphericity,and the bubble wall is composed of single-layer or multi-layer magnesium aluminate spinel grains.The compressive resistance of bubble depends on the thickness of wall and its uniformity.The decrease in particle size and introduction of bubbles with different sizes leads to the lowered pore size and enhanced mechanical strength of materials from the packing effects of bubbles.Controlling the introduction of bubbles with different sizes to reduce the point contact between bubbles is conducive to the enhancement of thermal insulation capacity of materials.

关 键 词：空心球 尖晶石 隔热材料 

分 类 号：TQ175.7[化学工程—硅酸盐工业]