摘要
SnO-coated FeNi alloy nanocapsules have been synthesized by an arc-discharge method. High-resolution transmission electron microscopy and x-ray photoelectron spectroscopy analysis show that the nanocapsules have a shell/core structure with FeNi alloy nanoparticles as the core and amorphous SnO as the shell. Dielectric relaxation of SnO shell and the interfacial relaxation between SnO shell and FeNi core lead to the dual nonlinear dielectric resonance. The natural resonance in the SnO-coated FeNi nanocapsules shifts to 14.0 GHz. Reflection loss (RL) reaches -46.1 dB at 14.8 GHz for a matching thickness of 1.95 mm, while it exceeds-20 dB over the 13.6 -16.7 GHz range and it exceeds -10 dB in the whole Ku-band (12.4-18 GHz). In addition, the optimal RL values at 5.0-7.6 GHz with the absorbing thickness of 3.4-5.0 mm just exhibit a slight fluctuation
摘要译文
SnO涂层的FeNi合金纳米胶囊已经通过电弧放电法合成。高分辨率透射电子显微镜和X射线光电子能谱分析表明纳米胶囊具有以FeNi合金纳米粒子为核心的壳/核结构，无定形SnO SnO壳的介电弛豫和SnO壳与FeNi核之间的界面松弛导致双非线性介电共振.SnO涂覆的FeNi纳米胶囊中的自然共振移动到14 Hz，反射损失（RL）达到-46 B为14 Hz，匹配厚度为1 mm，在13 16 Hz范围内超过-20dB，在整个Ku波段（12 8GHz）超过-10dB 此外， ，5 Hz处的吸收厚度为3μm的最佳RL值仅呈现轻微的波动
LI, Mingling; LI, Honglin; XU, Taotao ; NIE, Yu.. Synthesis, Characterization and Electromagnetic Properties of SnO-coated FeNi Alloy Nanocapsules.[J]. Materials Research, 2016,19(6): 1393-1398