CAJ | 학술논문

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ZnCo_2O_4,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tanδ_e)减小,而磁参数(μ',"μ和tanδ_u)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.
목적 제비ZnO:Co분체,병연구료불동Co참잡농도대ZnO:Co전자특성적영향.방법 채용용효.응효법제비료ZnO:Co분체,응용XRD,SEM등수단대산물진행료표정,용파도법측시료ZnO:Co분체재x파단(8.2GHz～12.4GHz)적전자삼수.결과 각양품균위륙방정계섬자광결구적구상과립,당참Co마이분수위5%시출현료미량적ZnCo_2O_4,XRD중3개주연사봉대응적정면간거수착참잡농도적증대이감소.종평균치적각도래간,각조양품구유교대적자손모,수착참잡농도적증대,ZnO:Co적개전삼수(ε',ε"화tanδ_e)감소,이자삼수(μ',"μ화tanδ_u)선증대후감소.결론 차공예조건하제비적ZnO:Co속우전자손모형미파흡수재료.
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 ZnCo_2O_4 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.