【摘要】 以δ-FeOOH为前驱体,用氨水调节溶液的pH值,分别采用(1)90℃水浴加热动态转化、(2)沸腾回流动态转化、(3)90℃静态转化及(4)200℃水热法四种方法合成了锰锌铁氧体纳米粉体。采用X射线衍射仪(XRD)、透射电子显微镜(TEM)、振动样品磁强计(VSM)和X射线荧光光谱仪(XRF)等方法对粉体进行了表征,对四种液相法制备的锰锌铁氧体纳米粉体的结构和性能等进行了对比和分析。结果表明,四种方法中沸腾回流相转化法得到的产物具有磁性能较好、形状较规则、粒径可控等优点。更多还原

【Abstract】 Using δ-FeOOH as precursor and ammonia to regulate the pH value of the solution, nanosized Mn-Zn ferrite powders were prepared by four different aqueous methods, including (1) 90℃ water bath, (2) boiling reflux, (3) 90℃ aging and (4) hydrothermal. The microstructure and magnetic properties of powders were characterized and analyzed by X-ray diffraction (XRD), transmission electron microscopy (TEM), vibrating sample magnetometer (VSM) and X-ray fluorescent spectrometry (XRF). Comparisons on morphology, particle size and properties were made between the samples by four methods. The results showed that the powder prepared by boiling reflux has better magnetic properties,more regular particle shape and controllable particle size.更多还原