M型铁氧体BaFeCoTiMnO微波吸收性能研究  

Study on microwave-absorbing properties of M-type ferrites BaFe_(11.85-2x)Co_xTi_xMn_(0.15)O_(19)

作　　者：王毓鹏[1] 李筱濛[1] 曹全喜[1] 卫云鸽[1] 黄云霞[1] 

机构地区：[1]西安电子科技大学技术物理学院,陕西西安710071

出　　处：《电子元件与材料》2007年第8期35-38,共4页Electronic Components And Materials

基　　金：陕西省自然科学基金资助项目(D70103050130)

摘　　要：采用共沉淀–熔盐法制备了M型铁氧体BaFe11.85-2xCoxTixMn0.15O19。运用TGA-DTA、XRD、SEM和矢量网络分析仪,对样品的晶化过程、相组成、显微形貌及微波吸收性能进行了表征。结果表明:Co2+、Ti4+固溶到铁氧体的晶格并取代Fe3+位,有助于提高铁氧体的电、磁损耗。当取代量x为1.2时,微波吸收最强,制得的样品的吸波频率在8.2～12.4 GHz范围内,tanδe、tanδμ的最大值分别为:9.0,6.8。M-type ferrite samples of BaFe11.85-2xCoxTixMn0.15O19 were prepared by coprecipitafion-fused salt method. XRD, TGA-DTA, SEM, and vector network analyzer were used to study the the crystallization process, phase composition, morphology, and microwave absorption performances of the barium ferrite. The results show that solid solution of Co^2＋ and Ti^4＋ in ferrite lattice and displace Fe^3＋-situ. This is a help to increase tan δe and tan δμ of the Ba ferrites. When x = 1.2, the samples obtained are best in dielectric loss and magnetic loss and the maximums of tan δe and tan δμ are separately 9.0 and 6.8 in the range of 8.2-12.4 GHz.

关 键 词：无机非金属材料 M型铁氧体 共沉淀–熔盐法 微波吸收性能 

分 类 号：O614.121[理学—无机化学]