BaZnZrM型铁氧体的溶胶凝胶合成及其微波电磁性能研究  

Study on the preparation and electromagnetic properties of BaZnZrM ferrites by sol-gel process

作　　者：葛鹰[1] 贺春华[1] 曾国勋[1] 张海燕[1] 陈天立[1] 郭慕思[2] 

机构地区：[1]广东工业大学材料与能源学院,广东广州510006 [2]暨南大学计算中心,广东广州510630

出　　处：《材料研究与应用》2008年第4期369-372,共4页Materials Research and Application

基　　金：国家自然科学基金对外交流与合作项目(50610105054);高等学校博士学科点专项科研基金(20050562002);广东省自然科学基金(036918);粤港关键领域重点突破招标项目(20061683)

摘　　要：采用柠檬酸溶胶-凝胶工艺，以硝酸钡、硝酸铁、硝酸锌、硝酸锆、柠檬酸为原料，在温度800℃～1050℃下合成了Ba（Zn0.5Zr0.5），Fe12-xO19（x=1,1．2，1．4,2）铁氧体材料，并对其进行了物相成分、显微结构的分析．对1050℃热处理2h后的铁氧体样品的复介电常数、复磁导率在0．5～6GHz下的变化规律进行了研究．结果表明,铁氧体的复介电常数随ZnZr的取代量的增加而增大；其复磁导率实部随测试频率的增加而减少，磁导率虚部都先随测试频率的增加而增加，达到最高值后随测试频率的下降μ”曲线上出现了一个畴壁共振引起的共振峰．In this paper, we use citric acid Sol-Gel process-barium nitrate, nitric acid iron, zinc nitrate, nitric acid zirconium and citric acid as raw materials, which synthesize the ferrite materials Ba（Zn0.5 Zr0.5） xFe12-xO19 （x= 1,1.2,1.4,2）. The ferrite materials are in 800～ 1050℃ different temperature heat treatment first, and then we research their phase composition and microstructure by XRD and SEM. We choose the ferrite samples by two hours heat treatment at 1050℃, and then we study their complex permittivity and complex permeability changes rating in the 0. 5 ～ 6 GHz by using the Vector Network Analyzer （VNA）. The result shows that, with the ZrZn＇s replace amount increasing, the ferrite＇s complex permittivity is increasing. The real part of complex permeability will be reduced by increasing the frequency. At the same time, the imaginary part of complex permeability will be increasing first, and then will be reduced after reaching the max value, μ” displays a resonance peak caused by domain-wall resonance.

关 键 词：BaZnZrM SOL-GEL 电磁性能 

分 类 号：TG113.22[金属学及工艺—物理冶金]