Fe2O3对尾矿微晶玻璃析晶及磁学特性影响的机理研究  

Effect of Fe2O3 on Crystallization and Magnetic Properties of Tailing Glass-ceramics

作　　者：黄李华 胡义发 姚力 郭卫松 杜永胜 HUANG Lihua;HU Yifa;YAO Li;GUO Weisong;DU Yongsheng(College of science, Inner Mongolia University of Science ＆Technology, Baotou 014010, China)

机构地区：[1]内蒙古科技大学理学院应用物理系

出　　处：《中国陶瓷》2018年第4期28-33,共6页China Ceramics

基　　金：2016年内蒙古科技大学大学生科技创新基金(2016-79);内蒙古自然基金项目(2017MS0507)

摘　　要：以白云鄂博尾矿及粉煤灰等固体废弃物为主要原料,利用熔融法制备得到了CAMS系尾矿微晶玻璃,通过DSC、XRD、SEM、TEM及振动样品磁强计等测试手段研究了Fe_2O_3对微晶玻璃析晶及磁学特性的影响规律。结果表明,微晶玻璃的初始形核相为磁铁矿相,随着热处理温度的升高,辉石相在磁铁矿晶核的基础上形成并逐渐生长。富铁微晶玻璃中磁铁矿相和辉石主晶相可同时存在,室温磁滞回线的测试结果表明磁铁矿相直接影响微晶玻璃的磁学特性。Tailing glass-ceramics based on the CAMS system are successfully prepared by melting method, using two hazardous industrial wastes of Bayan Obo mine tailing and fly ash as starting materials. Influences of iron oxide additions on crystallization and magnetic properties in the glass-ceramics have been investigated by using DSC, XRD, SEM, TEM and VSM. The results indicate that the magnetite can act as the core of nucleation, and it provides growing conditions for main crystal phases of augite to deposit and grow with the increase in heat treatment temperature. The magnetite phase and the main crystalline phase can exist simultaneously in glass-ceramics with high iron oxide content. The experimental data of magnetic hysteresis cycles at room temperature indicate that the magnetic properties of glass-ceramics are largely dependent on content of magnetite phases.

关 键 词：白云鄂博尾矿 微晶玻璃 磁铁矿 磁学特性 

分 类 号：TQ171.733[化学工程—玻璃工业]