摘要
以δ-FeOOH为前驱体,采用沸腾回流法直接合成了尖晶石结构的MnZn铁氧体纳米颗粒。用X射线衍射仪(XRD)、透射电镜(TEM)和振动样品磁强计(VSM)对其相成分、显微结构和磁性能进行了表征。详细探讨了共沉淀的pH值和回流反应时间对生成物化学组成和磁性能的影响。结果表明,通过调节pH值和回流时间可以得到从小于10nm到大于20nm不同粒径的锰锌铁氧体颗粒,获得完全产物的最佳回流时间为6h。pH值对反应剧烈程度及磁性能有很大影响,共沉淀pH值为13.0左右时获得的制备态纳米粉末尺寸为20nm,饱和磁化强度达46A·m2/kg。
The spinel-type Mn-Zn ferrite nano-powders were prepared by co-precipitation and refluxing method using δ-FeOOH as a precursor. The effects of refluxing time and the pH value of co-precipitation solution on the phase structure, morphology and magnetic properties of as-prepared powders were studie dusing XRD, transmission electron microscopy and vibration sample magnetometer. The results showed that the optimum refluxing time for complete reaction is 6h. The size of Mn0.5Zn0.5Fe2O4 powders varied between 〈10nm and 〉20nm. It was also found that the mean size of the nano-powders can be controlled by pH value of the co-precipitation solution and as-prepared powders with mean particle size of 20 nm and saturation magnetization of 46 A·m^2/kg were prepared when the pH value of co-precipitation solution is 13.
出处
《磁性材料及器件》
CAS
CSCD
北大核心
2010年第1期20-23,31,共5页
Journal of Magnetic Materials and Devices
基金
国家自然科学基金资助项目(50874050)
广东省自然科学基金资助项目(8151064101000084)
广东省科技计划资助项目(2008B010600005)
国家自然科学基金委员会-广东省联合基金重点资助项目(U0734001)
