喷雾-焙烧法制备的Co_2-Z型铁氧体及其电磁性能  

Preparation and electromagnetic properties of Co_2-Z type ferrite by spray-sintering

作　　者：齐海萍[1,2] 万军喜 曹海琳[1,3] 黄玉东[3] 

机构地区：[1]哈尔滨工业大学化学工程与技术博士后流动站,黑龙江哈尔滨150001 [2]深圳航天科技创新研究院深圳市复合材料重点实验室,广东深圳518057 [3]哈尔滨工业大学高分子科学与工程系,黑龙江哈尔滨150001

出　　处：《磁性材料及器件》2013年第6期31-34,共4页Journal of Magnetic Materials and Devices

摘　　要：以硝酸盐混合溶液喷雾干燥后的粉末为原材料制备了Co2-Z型铁氧体。分别利用XRD、SEM和微波矢量网络分析仪对产物的晶体结构、形貌及其电磁性能进行表征,并模拟计算不同样品厚度的吸波性能。结果表明,最佳焙烧温度为1100℃,比传统固相法低;所制备的Co2-Z型铁氧体为直径约2μm的六方片状,这是吸波材料理想的形貌;吸波性能优良,4mm铁氧体-石蜡样品(质量比3∶1)最大吸收量约为26dB。Co2-Z type ferrite was successfully prepared by using mixed nitrate powders via spray drying as the staring mattering materials. X-ray diffraction patterns（XRD）, scanning electron microscope（SEM） and vector network analyzer have been used to characterize the crystal structure, morphology and electromagnetic property. And the microwave absorbing properties of sample with different thickness have been calculated. The results show that the1100℃-calcined Co2-Z type ferrite with hexagonal flake shape and diameter of 2μm were obtained at calcining temperature of 1100℃, which is lower than that of traditional solid-phase method. For the sample with 4 mm thickness,the maximum reflecting power loss is about 26dB, indicating the sample as a very promising microwave absorption material.

关 键 词：Co2-Z型铁氧体 喷雾-焙烧 电磁参数 微波吸收性能 

分 类 号：TM277[一般工业技术—材料科学与工程]