熔盐法制备掺Nd铁酸铋粉末研究  

Research on Nd doped BiFeO_3 powder prepared by molten salt method

作　　者：陈华洲[1] 郭嘉阳[1] 阳生红[1] 张曰理[1] 

机构地区：[1]中山大学光电材料与技术国家重点实验室/理工学院,广东广州510275

出　　处：《材料保护》2013年第S2期93-95,共3页Materials Protection

基　　金：2012年中山大学教改实验开放基金;2012年中山大学教改理工学院基金项目

摘　　要：采用熔盐法制备出了一系列不同Nd掺杂量的铁酸铋粉末,通过X-射线衍射(XRD)、扫描电镜(SEM)分析了掺Nd铁酸铋粉末的晶相结构及表面形貌,研究了反应时间、温度及Nd掺杂量等条件对熔盐法制备掺Nd铁酸铋粉末的影响;利用量子公司的PPMS-VSM磁性测量系统测量了不同掺杂量下的磁滞回线。结果表明:适量Nd的加入有利于铁酸铋相的合成;随着掺Nd量的增加,Nd铁酸铋粉末晶相结构出现改变,在Nd掺杂量为17.5%附近时,其晶体结构由三方相转变为正交相;反应时间、温度影响掺Nd铁酸铋的晶粒大小和表面形貌,且满足奥斯特瓦尔德熟化机制;利用熔盐法合成的掺Nd铁酸铋的磁性较纯的铁酸铋有显著提高。Nd-doped BiFeO3 powder was successively prepared by molten-salt method. The microstructure and phase structure of Nd-doped BiFeO3 powder was examined by XRD and SEM. The effect of reaction time,reaction temperature and Nd doping content was studied. Magnetism of Nd-doped BiFeO3 powder was analysed by PPMS-VSM. The results are as following: Appropriate amount of Nd doping content is beneficial to the formation of pure phase BiFeO3. With the increase of Nd doping content,a phase transition appeared in Nd-doped BiFeO3 powder,the rhombohedral structure of undoped BFO film is modified to the orthorhombic or tetragonal structure when Nd doping content is about17.5%. The reaction time and the reaction temperature can affect the scale and surface morphology of Nd-doped BiFeO3 powder,following the Ostwald ripening mechanism. Magnetism of Nd-doped BiFeO3 powder could be enhanced by Nd doping obviously.

关 键 词：熔盐法 多铁材料 铁酸铋 稀土掺杂 

分 类 号：TB383.3[一般工业技术—材料科学与工程]