Abstract
采用非平衡物理气相蒸发法在氢气-氩气混合气氛下制备了氧化硅包覆铁“壳/核”型纳米复合粒子.通过X射线衍射（XRD）、透射电子显微镜（TEM）和能谱分析（EDS）等方法表征了纳米复合粒子的相组分、结构以及颗粒形貌.结果表明,制备的氧化硅包覆铁纳米复合粒子的尺寸在50nm左右,在铁纳米粒子的表面还出现了非晶态的氧化硅纳米棒,长度为150-200nm.利用电磁参数模拟微波吸收特性得出,涂层厚度为1.79mm时,在15.4GHz频率处达到最小反射损耗值为-14.5dB,反射损耗在8-18GHz的频段低于-10dB,且损耗机制为自然共振.
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