铁酸铋纳米颗粒组装的靶材及掺杂改性

发布时间：2018-01-02 21:33

本文关键词：铁酸铋纳米颗粒组装的靶材及掺杂改性　出处：《内蒙古大学》2016年硕士论文　论文类型：学位论文

【摘要】：本论文用酒石酸法制备铁酸铋纳米级颗粒靶材,得到的靶材具有无杂相、成分单一、平整致密硬度大等优点,然后研究了掺杂对铁酸铋陶瓷微结构和磁性的影响。论文中,首先,粗略比较了固相烧结法和酒石酸法制备的结果,可以看出用第二种方式制备的样品纯度更高。然后,用酒石酸法制备出纯相(BFO)、Mn3+掺杂(BFMO)、Tb3+掺杂(BTFO)、Mn-Tb共掺杂(BTFMO)的铁酸铋(BiFeO3)陶瓷,其掺杂浓度分别为x=0、0.05、0.10、0.15、0.20。同时,基于Mn3+, Tb3+元素的掺杂会影响铁酸铋薄膜晶体结构的基础上,对其磁性的影响进行了探究。对Mn3+、Tb3+掺杂和Mn-Tb共掺杂这三种掺杂方式进行研究,发现在Mn3+, Tb3+分别掺杂的情况下和Mn-Tb共掺杂时铁酸铋陶瓷的微结构及磁特性均出现了不同程度的改变。通过XRD、高分辨率透射电镜和磁性测试结果分析,掺杂使得铁酸铋的结构从单一的R3c空间群变化到Pnma空间群,同时其所属的晶系也发生相应的改变。这一微结构变化使得铁酸铋陶瓷的磁性发生改变。通过对本实验中各掺杂方式对比,发现Mn3+和Tb3+掺杂为铁酸铋陶瓷磁性质的改良提供了一条可行的途径,同时为我们制备高密度的纳米颗粒组装的靶材提供了可循之路。
[Abstract]:This paper was prepared by tartaric acid bismuth ferrite nano particles obtained by target, target has no impurity phase, single component, has the advantages of compact high hardness, and the effect of doping on BiFeO3 ceramic micro structure and magnetic properties. In this paper, firstly, a rough comparison solid-phase sintering and tartaric acid method the results can be seen for sample purity by second ways higher. Then, using tartaric acid was prepared by pure phase (BFO), Mn3+ (BFMO) doped, Tb3+ doped (BTFO), Mn-Tb (BTFMO) of the Co doped bismuth ferrite (BiFeO3) ceramics, the doping concentration respectively. X=0,0.05,0.10,0.15,0.20. at the same time, based on Mn3+, Tb3+ doping will affect the crystal structure based bismuth ferrite thin film and its influence on magnetic properties were studied. The research of Mn3+, Tb3+ doped and Mn-Tb Co doped the three doping methods, now Mn3+, Tb3+ doped case And while the Mn-Tb Co doped bismuth ferrite ceramic microstructure and magnetic properties have been changed by XRD, TEM analysis and magnetic test results of the high resolution, the structure of doped bismuth ferrite changes from single R3c space group to Pnma space group, at the same time the system also has the corresponding the change of the micro structure change. The magnetic BiFeO3 ceramics change. Through the comparison of various doping methods in this experiment, found that Mn3+ and Tb3+ doping provides a feasible way for the improvement of magnetic properties of BiFeO3 ceramics, while providing a way for our business target of nano particles is high the density of the assembly.

【学位授予单位】：内蒙古大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TB383.1;TQ174.1

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