Abstract The electromagnetic(EM) wave absorption properties of carbon-based magnetic nanoparticles prepared by gaseous detonation and explosive detonantion are different. In present study, the influence of detonation temperature on EM wave absorption property of Fe@C nanoparticles was studied by heat treatment. The results demonstrated that heat treatment was an easy and effective way to improve the EM wave absorption property of Fe@C nanoparticles. The reflection loss (RL) value reduced significantly from -1.8 dB to -17.1 dB, and the effective absorption frequency was 7.1 GHz. The improvement of phase and degree of graphitization resulted in the change of electromagnetic parameters, which led to a better impedance matching. As a result, the EM wave absorption property of Fe@C nanoparticles was enchanced. Detonation temperature is a key factor on EM wave absorption property of Fe@C nanoparticles, and heat treatment is an easy and useful way to enhance the EM wave absorbing ability of gaseous detonation Fe@C nanoparticles.

中文翻译：

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气态爆轰法制备Fe@C纳米粒子的电磁波吸收机理

摘要 气态爆轰法和爆炸爆轰法制备的碳基磁性纳米粒子的电磁波吸收特性不同。本研究通过热处理研究了爆轰温度对 Fe@C 纳米粒子电磁波吸收特性的影响。结果表明，热处理是提高 Fe@C 纳米粒子的电磁波吸收性能的一种简单有效的方法。反射损耗（RL）值从-1.8 dB显着降低到-17.1 dB，有效吸收频率为7.1 GHz。相位和石墨化程度的改善导致电磁参数的变化，从而导致更好的阻抗匹配。结果，增强了 Fe@C 纳米粒子的电磁波吸收特性。