【摘 要】
：
采用机械化学法合成了FeCo/TiO_2纳米复合材料,该材料与石蜡的复合物在13.5GHz处复介电常数的实部ε′值具有较大的波动,复介电常数的虚部ε″产生强烈的介电共振峰,ε′-ε
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采用机械化学法合成了FeCo/TiO_2纳米复合材料,该材料与石蜡的复合物在13.5GHz处复介电常数的实部ε′值具有较大的波动,复介电常数的虚部ε″产生强烈的介电共振峰,ε′-ε″的复平面上Cole-Cole图呈现一个全圆。制备态样品经500℃退火后,退火样品中FeCo纳米粒子的衍射峰明显变窄,表明晶粒尺寸增加,晶格缺陷减少,微观应力得到释放;同时,退火导致饱和磁化强度增加,矫顽力减小,介电共振行为消失。制备态样品的厚度为8.15mm时,反射损耗在12.6GHz处取得最大值-38.3dB,且当厚度为7.
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