Al在方镁石-尖晶石材料中作用机理研究  

Mechanism Research of Al on Periclase-spinel Materials

作　　者：栾舰[1,2] 王春艳[2] 孙加林[1] 周大鹏 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]辽宁科技大学高温材料与镁资源工程学院,鞍山114051 [3]营口青花集团耐火材料研究院,营口115100

出　　处：《硅酸盐通报》2015年第10期2905-2908,共4页Bulletin of the Chinese Ceramic Society

摘　　要：本研究以电熔镁砂、尖晶石、金属铝粉为原料制成方镁石-尖晶石材料,研究该材料在高温使用条件下金属Al的高温反应行为以及产物的变化。在高温条件下获得了Mg-Al-(Si)-O-N系非氧化物结合的、性能优异的方镁石-尖晶石材料。通过XRD物相检测及SEM显微结构分析,发现在材料的气孔中及镁砂颗粒表面生成大量纤维及六方片状晶体,经XRD及EDS检测,确定该物相为M1.75Si1.75Al3.5O3N5。研究表明,方镁石-尖晶石材料中添加金属Al,由于在使用条件下形成了一系列的氮化物或氮氧化物的非氧化物结合相,不仅能提高材料的热震性能,还能提高材料的抗侵蚀等使用性能,对研究开发RH精炼炉无铬化材料具有重大意义。Periclase-spinel materials were prepared by fused-magnesite,spinel and Al powder as raw materials.This materials bonded by non-oxidate of Mg-Al-（ Si）-O-N was excellent with good heat shock resistance and slag resistance were obtained.The reaction mechanism at high-temperature of Al in this system was studied,that metallic aluminum powder introduced into periclase-spinel system refractory under the atmosphere condition of bury carbon at different firing temperature.The samples after buried in carbon firing for 2 h were determined by XRD phase detection and structural analysis of SEM micrographs.Result show that there is no Al present in sample,and a large number of fibers and hexagonal plate-like crystals present in the pores and grains of the material,detected by XRD and EDS to determine the phase of M1.75Si1.75Al3.5O3N5.

关 键 词：AL 方镁石-尖晶石 非氧化物 

分 类 号：TQ174[化学工程—陶瓷工业]