在本論文中，利用固態反應法以及溶膠凝膠法製備鎳鋅鈷鐵氧體粉末(Ni0.5Zn0.5-xCoxFe2O4，x = 0.1、0.2、0.3、0.4、0.5)，分別添加壓克力樹脂利用旋轉塗佈法所製成的壓克力樹脂樣品，以及添加環氧樹脂利用熱壓法所製成的環氧樹脂樣品，觀察其表面微結構、成分分析、實部阻抗以及表面粗糙度。 表面微結構的分析結果發現，熱壓法所製成的環氧樹脂樣品比旋轉塗佈法所製成的壓克力樹脂樣品被樹脂包覆的情形較完整，表面較難找到縫隙或孔洞。Co的添加量越多時，表面微結構並沒有明顯規律。 成分分析的結果發現，Co的原子百分比隨Co的添加量增加而增加，Zn的原子百分比隨Co的添加量而減少。實部阻抗的分析結果發現，熱壓法所製成環氧樹脂樣品之實部阻抗偏移量高於旋轉塗佈法所製成壓克力樹脂樣品之實部阻抗偏移量。固態反應法所製備Ni0.5Zn0.4Co0.1Fe2O4粉末添加環氧樹脂利用熱壓法所製備出的樣品最近皆接近參考樣品，而在Co的添加量越多時，實部阻抗偏移量會越低。 虛部阻抗的分析結果發現，熱壓法所製成環氧樹脂樣品之虛部阻抗偏移量高於旋轉塗佈法所製成壓克力樹脂樣品之虛部阻抗偏移量。固態反應法所製備Ni0.5Zn0.4Co0.5Fe2O4粉末添加環氧樹脂利用熱壓法所製備出的樣品最近皆接近參考樣品，而在Co的添加量越多時，虛部阻抗偏移量會越高。 表面粗糙度的分析結果發現，Co的添加量對表面粗糙度的變化沒有明顯規律，但在溶膠凝膠法所製備Ni0.5Zn0.5-xCoxFe2O4粉末添加環氧樹脂利用熱壓法製備之樣品，平均粗糙度會隨著Co的添加量增加而增加。 In this study, we reported on the surface micro-structure, component analysis, electrical impedance, and surface roughness of cobalt doped nickel-zinc ferrites (Ni0.5Zn0.5-xCoxFe2O4, x = 0.1, 0.2, 0.3, 0.4, 0.5). Ferrites were prepared by solid state and sol-gel methods and mixed with acrylic resin for spin coating and with epoxy resin for hot pressing.The surface micro-structure does not change obviously with doping amount of cobalt.The cobalt atomic % increases with doping amount of cobalt, but the zinc atomic % decreases with doping amount of cobalt.The real part of electrical impedance of sample prepared by hot pressing is higher than that of sample prepared by spin coating. The real part shift of electrical impedance of Ni0.5Zn0.4Co0.1Fe2O4 prepared by solid state method mixed with epoxy resin for hot pressing is more close to that of reference. The real part shift of electrical impedance increases with the doping amount of cobalt.The imaginary part of electrical impedance of sample prepared by hot pressing is higher than that of sample prepared by spin coating. The imaginary part shift of electrical impedance of Ni0.5Co0.5Fe2O4 prepared by solid state method mixed with epoxy resin for hot pressing is more close to that of reference. The imaginary part shift of electrical impedance decreases with the doping amount of cobalt.The surface roughness does not change obviously with doping amount of cobalt. The surface roughness of ferrite prepared by sol-gel method mixed with epoxy for hot pressing increases with the doping amount of cobalt.
