磁场对水热法制备锰锌铁氧体的影响  

The effect of magnetic field on MnZn Ferrite Prepared by hydrothermal synthesis

作　　者：钟世安[1] 胡启明[1] 古映莹[1] 

机构地区：[1]中南大学化学化工学院,湖南长沙410083

出　　处：《中国锰业》2005年第2期36-39,共4页China Manganese Industry

摘　　要：在磁场条件下用水热法制备了尖晶石型锰锌铁氧体粉末。利用X-射线衍射、X-射线光电子能谱和高锰酸钾分光光度法对铁氧体粉末的微观结构、表面原子信息和锰的平均价态进行了研究。研究表明,在磁场条件下制备得到的物质没有新相的产生,磁场对锰锌铁氧体锰的平均价态有影响,且内加磁晶使锰的平均价态升高,而外加磁场使锰的平均价态降低。在内加磁晶和外加磁场的条件下得到的铁氧体样品,可能有一部分的锌进入了尖晶石的B位。Mn-Zn ferrite is prepared by using hydrothermal synthesis in the presence and the absence of Mn-Zn ferrite crystal or magnetic field. The microstructure, the surface atom and the average manganese valence are investigated via X-ray diffract diameter (XRD),a-ray photoelectron spectrum (XPS) and the potassium permanganate spectrophotometer method. The XRD results show that no new structure phase was gained under such intensity of magnetic field. The XPS results show that in one special sample a small portion of Zn^(2+) may occupied the octahedral B sites. A cursory conclusion of the effect of magnetic field will be made that the average manganese valence of MnZn-ferrite increase when adding nanoscal particles of MnZn-ferrite, versus the average manganese valence of MnZn-ferrite decrease when adding a magnetic field.

关 键 词：水热法 锰锌铁氧体 XPS 磁场 锰的价态 

分 类 号：TN29[电子电信—物理电子学] TM271.2[一般工业技术—材料科学与工程]