钙钛矿型铁酸铋粉体的水热合成及表征  

Hydrothermal Synthesis and Characterization of Perovskite Bismuth Ferrite Powders

作　　者：苗鸿雁[1] 张琼[1] 谈国强[1] 朱刚强[2] 

机构地区：[1]陕西科技大学材料科学与工程学院,陕西西安710021 [2]陕西师范大学物理学与信息技术学院,陕西西安710062

出　　处：《稀有金属材料与工程》2007年第A01期1-3,共3页Rare Metal Materials and Engineering

基　　金：国家自然科学基金项目(50372039)

摘　　要：分别以FeCl3·6H2O和Fe(NO3)3·9H2O为铁源,Bi(NO3)3·5H2O为铋源,氨水为沉淀剂,KOH为矿化剂,采用共沉淀法制备前驱物,水热合成出纯相的BiFeO3粉体。借助X射线衍射、扫描电镜和傅里叶变换红外光谱分析,对所制备的粉体的晶相结构、显微形貌和键性进行了表征。结果表明,以FeCl3·6H2O为铁源水热制备BiFeO3粉体比以Fe(NO3)3·9H2O为铁源的合成温度更低,温度范围更宽;不同的铁源和前驱物浓度对所制备BiFeO3粉体的显微形貌影响很大;所制备BiFeO3粉体存在Fe-O键的弯曲振动和伸缩振动,表明了FeO6八面体的存在和BiFeO3的钙钛矿结构。Single-phase BiFeO3 powders were synthesized via co-precipitation and hydrothermal process, by using FeCl3·6H2O and Fe（NO3）3·9H2O as Fe resource and Bi（NO3）3·5H2O as Bi resource, respectively, ammonia as precipitant and KOH as mineralizer. The phase structure, micro-morphology and bond vibration of as-prepared BiFeO3 powders were characterized by X-ray diffraction, scanning electron microscopy and Fourier transform infrared spectrophotometer. The results showed that the hydrothermal reaction temperature for producing BiFeO3 powders was lower and the temperature range was broader when FeCl3·6H2O was used as Fe resource than those when Fe（NO3）3·9H2O was used. The micro-morphology of prepared BiFeO3 powders was much affected by the type of Fe resource and the precursor concentration. The stretching and bending vibration of Fe-O bonds in the synthesized BiFeO3 powders detected by FT-IR indicates the presence of the octahedral FeO6 groups in the perovskite structure.

关 键 词：BiFeO3粉体 铁磁电材料 水热合成 

分 类 号：O614.4[理学—无机化学]