ZnO:Co粉体的制备及其电磁性能研究  

Preparation and electromagnetic performance of ZnO:Co powder

作　　者：游天桂[1] 张志勇[1] 阎军锋[1] 赵武[1] 张龙[1] 

机构地区：[1]西北大学信息科学与技术学院,陕西西安710127

出　　处：《西北大学学报（自然科学版）》2009年第6期944-947,共4页Journal of Northwest University（Natural Science Edition）

基　　金：国家大学生创新实验计划基金资助项目(200721);西安应用材料创新基金资助项目(XA-AM-200712)

摘　　要：目的制备ZnO:Co粉体,并研究了不同Co掺杂浓度对ZnO:Co电磁特性的影响。方法采用溶胶-凝胶法制备了ZnO:Co粉体,应用XRD,SEM等手段对产物进行了表征,用波导法测试了ZnO:Co粉体在X波段(8.2GHz^12.4GHz)的电磁参数。结果各样品均为六方晶系纤锌矿结构的球状颗粒,当掺Co摩尔分数为5%时出现了微量的ZnCo2O4,XRD中3个主衍射峰对应的晶面间距随着掺杂浓度的增大而减小。从平均值的角度来看,各组样品具有较大的磁损耗,随着掺杂浓度的增大,ZnO:Co的介电参数(ε,′ε″和taneδ)减小,而磁参数(μ,′μ″和tanuδ)先增大后减小。结论此工艺条件下制备的ZnO:Co属于电磁损耗型微波吸收材料。Aim To prepare ZnO：Co powder and study their electromagnetic performance with different doping concentration of Co. Methods The ZnO ： Co powder was prepared by Sol-gel process and their morphology and structure were investigated by XRD, SEM and so on. The permittivity and magnetic constants of the products were studied by waveguide method in X band （8.2GHz - 12.4GHz）. Results The products were all globosity powders with hexagonal wurtzite structure, but there were traces of ZnCo2O4 when the doping concentration of Co was 5 %. With the doping concentration increased, the interplanar spacing of the main diffraction maximum in XRD. For the meanvalue in X band, the products have biggish magnetic loss property, and the dielectric parameter reduced and the magnetic parameter first ascended and then descended with the doping concentration increased. Conclusion ZnO：Co prepared by this technological condition is microwave absorption material with electromagnetic loss.

关 键 词：ZnO:Co粉体 溶胶-凝胶法 电磁性能 微波吸收 

分 类 号：TB321[一般工业技术—材料科学与工程] O441.6[理学—电磁学]