Co2W型六角晶系铁氧体的磁性与微波吸收性能  

Magnetism and Microwave Absorbing Ability of Co_2 W Type Hexagonal Ferrite

作　　者：邓联文[1] 丁丽[1] 安维[2,3] 聂彦[4] 

机构地区：[1]中南大学物理科学与技术学院粉末冶金国家重点实验室,湖南长沙410083 [2]广东省公安消防总队 [3]惠州消防局,广东惠州516001 [4]华中科技大学电子科学与技术系,湖北武汉430074

出　　处：《矿冶工程》2009年第1期82-85,93,共5页Mining and Metallurgical Engineering

基　　金：国家自然科学基金资助计划项目(60771028)

摘　　要：采用传统的氧化物固相反应法制备组分为BaZn1.1Co0.9Fe16O27的Co2W型六角晶系铁氧体材料,研究了工艺参数、材料组成等对软磁特性、微波电磁参量、特性阻抗及吸波性能的影响。结果表明,适当提高烧结温度有助于提高W型铁氧体材料的饱和磁化强度,减小矫顽力,从而提高其磁导率;由Co2W型六角晶系铁氧体材料构成的吸波材料的阻抗匹配特性和吸波性能可以通过材料组成、材料复合及材料厚度变化来调整,有利于高性能铁氧体吸波材料的设计和制备。The Co2W type hexaferrite material whose constituent is BaZn1.1 Co0.9Fe16O27 was prepared by traditional oxide solid-phase reaction and the effects of technology parameters and constituent on soft magnetism, microwave electromagnetic parameters, characteristic impedance and microwave absorbing properties were investigated. The results show that proper increase of sintering temperature can improve the saturation magnetization of W type ferrite material and reduce coercivity so as to increase the permeability. The impedance matching and microwave absorbing properties of the microwave absorbing material consisted of Co2W type hexaferrite material can be adjusted by the change of constituent, composition and thickness of the absorbing material, which is beneficial to the design and preparation of high quality ferrite microwave absorbing material.

关 键 词：吸波材料 六角晶系铁氧体 阻抗匹配 烧结工艺 

分 类 号：TM27[一般工业技术—材料科学与工程]