镧六角晶系铁氧体Ba_(0．8)La_(0．2)(Zn_(0．5)Ni_(0．5))_(2-x)Co_xFe_(15)O_(27)的制备及电磁性能  

Preparation and Electromagnetic Properties of Lanthanum Hexagonal Ferrite Ba_(0.8)La_(0.2)(Zn_(0.5)Ni_(0.5))_(2-x)Co_xFe_(15)O_(27)

作　　者：张跃[1] 王洪涛[1] 刘建武[1] 严生虎[1] 沈介发[1] 

机构地区：[1]江苏工业学院,江苏常州213164

出　　处：《稀有金属材料与工程》2007年第A03期308-311,共4页Rare Metal Materials and Engineering

摘　　要：用柠檬酸溶胶-凝胶法制各了铁氧体Ba_(0.8)La_(0.2)(Zn_(0.5)Ni_(0.5)_(2-x_Co_xFe_(15)O_(27)(x=0.8,1.0,1.2,1.4)。采用X射线衍射(XRD)分析,扫描电镜(SEM),热重(TG)和差热分析(DTA)对凝胶及铁氧体的晶型和显微结构进行了研究,并用网络分析仪测试了样品在2～18 GHz范围内的的电磁参数。研究发现制备的铁氧体是片状的W型晶体,随着Co^(2+)含量的增多,铁氧体中M晶型的含量逐渐增多;当x为1.0时,铁氧体的损耗角正切达到最大值0.57。The Lanthanum hexagonal ferrite Ba0.8La0.2（Zn0.5Ni0.5）2-xCoxFe15O27（x=0.8, 1.0, 1.2, 1.4） was prepared by citrate sol-gel method. The detailed information on the crystallography of the ferrite, the ferrite electromagnetic properties in the frequency range of 2-18 GHz, were investigated using by X-ray diffractometry （XRD）, scanning electron microscopy （SEM）, thermo-gravimetry （TG） and differential scanning calorimetry （DSC）. The results showed that the Ba0.8La0.2（Zn0.5Ni0.5）2-xCoxFe15O27（x=0.8, 1.0, 1.2, 1.4） is sheet-like W-type. With the cobalt increasing, the W-type ferrite augmented, and the most loss angle tangent is 0.57 when x =1.0.

关 键 词：柠檬酸 溶胶-凝胶法 镧六角晶系铁氧体 晶体结构 电磁性能 

分 类 号：TM277[一般工业技术—材料科学与工程]