摘要
以聚乙二醇为表面活性剂辅助水热法制备了纳米NixZn1-xFe_2O_4(x=0.4、0.5、0.6、0.7)铁氧体,通过XRD、FESEM、TEM和PNA分析,研究了不同的Ni^(2+)含量对Ni-Zn铁氧体的粒度、形貌及其电磁损耗特性的影响。结果表明,水热法制备的晶体具有良好的结晶度,Ni^(2+)含量不会影响样品的形态和结构,样品颗粒呈类球形,粒径在20~30 nm,在1~18 GHz的测试条件下具有介电损耗与磁损耗。Ni-Zn铁氧体电磁损耗随Ni^(2+)含量的增加先增大后减小,当Ni^(2+)含量x=0.6时,晶体晶化更加完整,粒度更加细化,对小于14 GHz中低频微波电磁损耗能力更强,在3GHz处,磁滞损耗正切tanδm达到最大值为1.03,介电损耗正切tanδe在3 GHz、9.5 GHz分别达到0.052、0.057,具有一定的微波吸收能力。
Nanocrystalline NixZn1-xFe2O4( x = 0. 4、0. 5、0. 6、0. 7) ferrite was prepared by using polyethylene glycol as surface active agent and hydrothermal method. From the XRD,FESEM,TEM and PNA analysis,the effects of different Ni^(2+)content on the particle size,morphology and the characteristics of electromagnetic loss of Ni-Zn ferrite were studied. The results show that crystals prepared by hydrothermal method have good crystallinity,Ni^(2+)content does not affect the morphology and structure of the sample,particle shape similar to sphere,particle size in 20-30 nm. The crystal has a dielectric loss and magnetic loss under the condition of 1-18 GHz testing. The electromagnetic loss of Ni-Zn ferrite increases at first and then decreases with the increase of Ni^(2+)content. When the Ni^(2+)content of x = 0. 6,the crystallization of the crystal is more complete and the grain size is more refined. For the low frequency microwave in less than 14 GHz,the electromagnetic loss is stronger. At 3 GHz,the hysteresis loss tangent tanδmreached the maximum value of 1. 03 and dielectric loss tangent tanδeat 3 GHz,9. 5 GHz reached 0. 052 and 0. 057,has a certain microwave absorbing ability.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2016年第3期789-794,共6页
Journal of Synthetic Crystals
基金
国家自然科学基金(51372108)
关键词
镍锌铁氧体
水热法
电磁损耗性能
微波吸收性能
Ni-Zn ferrite
hydrothermal method
electromagnetic loss property
microwave absorption property
