在本論文中，我們利用溶膠凝膠法與固態反應法製備(Ba0.8Pb0.2)TiO3-(Ni0.9Cu0.04Mn0.06)Fe2O4磁電複材，並觀察其微結構、熱膨脹係數、及磁電性質的變化。結果發現BPT-NCMFO的複合比例對於磁電複材的材料性質會有顯著的影響。 BPT-NCMFO磁電複材在空氣中經過3小時不同溫度燒結，相對密度、導磁率在相同BPT複合比例下，固態反應法所製備之磁電複材性質皆大於溶膠凝膠法。熱膨脹係數則是在BPT複合比例為75 mol%與100 mol%下，固態反應法會小於溶膠凝膠法，其他比例則是溶膠凝膠法較小。而介電損失在相同BPT複合比例下，溶膠凝膠法所製備之磁電複材性質皆小於固態反應法。介電常數則是在BPT複合比例為0 mol%、75 mol%、100 mol%下，溶膠凝膠法會大於固態反應法，其他比例則是固態反應法較大。磁損率除了在75 mol%以外，溶膠凝膠法皆小於固態反應法。 此外，磁電複材於共振腔頻率為10 GHz下，添加一外加磁場時對導磁率與磁損率量測的結果有顯著的影響。 In this study, we reported on the thermal expansion coefficients, microstructures, dielectric properties, and magnetic properties of (Ba0.8Pb0.2)TiO3-(Ni0.9Cu0.04Mn0.06)Fe2O4 magnetoelectric composites prepared by sol-gel method and solid state method. The BPT percentage of BPT-NCMFO composites has a strong influence on the material properties. The composites were sintered for 3 hrs at various sintering temperatures. At the same BPT percentage, the relative density and permeability of the composites prepared by solid state method are higher than those of the composites prepared by sol-gel method. However, the loss tangent of the composites prepared by sol-gel method is lower than that of the composites prepared by solid state method. Except for the composites of 75 mol% and 100 mol% BPT, the thermal expansion coefficients of the composites prepared by solid state method are lower than that of the composites prepared by sol-gel method. Except for the composites of 0 mol%, 75 mol%, and 100 mol% BPT, the dielectric constant of the composites prepared by sol-gel method are higher than that of the composites prepared by solid state method. Except for the composites of 75 mol% BPT, the loss of permeability of the composites prepared by sol-gel method is lower than that of the composites prepared by solid state method. Besides, the magnetic properties of the magnetoelectric composites were obviously affected by applying a magnetic field at a frequency of 10 GHz.
