微波铁氧体介电常数研究进展及回顾  

Review to the development in the dielectric constant of microwave ferrite

作　　者：韩志全[1] HAN Zhi-quan(Southwest Institute of Applied Magnetics,Mianyang 621000,China)

机构地区：[1]西南应用磁学研究所

出　　处：《磁性材料及器件》2019年第1期61-70,72,共11页Journal of Magnetic Materials and Devices

摘　　要：微波铁氧体材料的介电常数是器件设计的重要参数。随着微波铁氧体器件小型化的迅猛发展,市场对高介电常数微波铁氧体材料提出越来越迫切的需求,特别是窄线宽高介电常数石榴石材料。提高介电常数ε?便成为了微波铁氧体材料研究的热点之一。回顾了微波铁氧体材料介电常数的研究进展,如早期报导的尖晶石型和石榴石型材料的介电常数及其温度特性,离子代换对YIG、Li系、Ni系铁氧体介电常数的影响等;着重介绍了石榴石铁氧体材料的介电常数研究概况,包括近期研发的ε?=25?30的高介电常数Bi:YCaZrVIG材料;对该材料中Bi3+离子的作用进行了分析。The dielectric constant of microwave ferrite materials is an impotent parameter for thedevice design.With the development of the microwave ferrite devices in minimizing,by prompting of the requirement to enhance the dielectric constant of materials,the study on microwave ferrite materials with high dielectric constant becomes more and more hot.This paper gives a review to the investigations on fields in the dielectric constant of microwave ferrite,such as the dielectric constant values and their temperature dependence for microwave ferrites with spinel structure and garnet structure,and the effect of various substituting ions on the dielectric constant value of YIGs,lithium and nickel ferrites,with the emphasis on garnets.The Bi:YCaZrVIGs materials having the value of dielectric constant as high as 25 to 30 are discussed.The mechanism in enhancement of dielectric constant value of garnet with Bi^3+ion substitution is analyzed.

关 键 词：微波铁氧体 石榴石 LI铁氧体 NIZN铁氧体 介电常数 

分 类 号：TM277[一般工业技术—材料科学与工程] TM21[电气工程—电工理论与新技术]