Zn取代Ni_2Y型六角铁氧体的微波吸收特性  

Microwave-absorption Properties of Zn-substituted Ni_2Y Hexaferrites

作　　者：陈凯锋[1] 赵敏光[1] 刘方舒[1] 徐明[1] 

机构地区：[1]四川师范大学固体物理研究所,四川成都610068

出　　处：《磁性材料及器件》2006年第4期30-31,34,共3页Journal of Magnetic Materials and Devices

摘　　要：采用陶瓷烧结方法制备了Ba2Ni2-xZn＋Fe12O22（x=0，0．8）六角铁氧体。X射线衍射（XRD）分析表明样品为单相Y型六角铁氧体，扫描电镜（SEM）观察显示样品形貌呈球状颗粒，直径约为500nm。用驻波比法在1-4GHz频率范围测量了样品的微波吸收率，发现Zn^2＋掺杂对Ni2Y型六角铁氧体的微波吸收性能影响很小，在频率2．4GHz，材料对微波均有较强的吸收峰，对厚度d=1．2mm的样品，吸收率达85％。Zn-substituted Ni2Y hexaferrites were prepared by solid-state reaction method. X-ray diffraction（XRD） showed the sample is single phase Y-type hexaferrite. SEM observation showed that it appears to be spherical grain with a diameter of about 500nm. Microwave absorptivity was measured via standing wave ratio method in 1-4GHz ranges. Zn-substitution has low effect on the microwave-absorption properties of Ni2Y hexaferrites. A strong absorption peak with absorptivity of 85% occurs at frequency of 2.4 GHz for sample with thickness of d=1.2mm.

关 键 词：Y型六角铁氧体 吸波材料 驻波比法 微波吸收 

分 类 号：TM25[一般工业技术—材料科学与工程] TM277[电气工程—电工理论与新技术]