高性能铁磁性微晶玻璃析晶机理及磁性研究  

Crystallization Mechanism and Magnetic Properties of High-performance Ferromagnetic Glass-ceramics

作　　者：杜永胜[1] 张红霞[1] 陈华[1] 张雪峰 赵鸣 李保卫 

机构地区：[1]内蒙古科技大学数理与生物工程学院,包头014010 [2]内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室,包头014010

出　　处：《人工晶体学报》2015年第2期459-463,共5页Journal of Synthetic Crystals

基　　金：国家重点基础研究发展计划(973计划)(2012CB722802);内蒙古自治区自然科学基金(2014MS0106)

摘　　要：以白云鄂博东尾矿及粉煤灰等固体废弃物为主要原料制备得到了性能优异的微晶玻璃。利用X射线衍射仪(XRD)及高分辨率透射电镜(HRTEM)等测试手段揭示了微晶玻璃的形核及析晶过程。结果表明,热处理过程中磁铁矿晶核首先析出,主晶相辉石相可在磁铁矿晶核上生长。通过调整氧化铁含量可改变微晶玻璃的析晶、物化及磁学特性。随氧化铁含量的增加,微晶玻璃的析晶特性及物化性能均有所降低,但磁学特性有所提高。在高氧化铁含量的微晶玻璃中,磁铁矿相与辉石相可以同时存在,微晶玻璃的磁性主要来源于磁铁矿相。High-performance glass-ceramics were successfully produced using Bayan Obo east mine tailing and fly ash as main raw material. The nucleation and crystallization process of glass-ceramics were revealed by X-ray diffraction （XRD） and high resolution transmission electron microscopy （HRTEM）. The results indicate that the magnetite can appear in the initial stages of nucleation and the main phase of augite phase can form and grow on magnetite nuclei. The crystallization characteristics, mechanical properties and magnetic properties of glass-ceramics can be changed by adjusts the content of iron oxide. The crystallization characteristics and mechanical properties of glass-ceramics decreased with the increase of iron oxide, but the magnetic properties of glass-ceramics can be improved. The magnetite phase and augite phase can exist simultaneously in glass-ceramics with high iron oxide content. The reason for the magnetic properties of glass-ceramics can be explained as the appearance of magnetite.

关 键 词：微晶玻璃 辉石相 磁铁矿相 析晶特性 磁学性能 

分 类 号：TQ171[化学工程—玻璃工业]