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Si含量對NdFe材料微波吸收特性的影響
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國家自然科學(xué)基金 (50961005)；廣西信息材料重點實驗室主任基金 (桂科能0710908-12-Z)


Effect of Si Contents on Microwave Absorbing Properties of NdFe Materials
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    摘要:

    采用高能球磨和晶化熱處理方法制備釹鐵吸波粉體，研究Si含量對釹鐵粉體吸波性能的影響。結(jié)果發(fā)現(xiàn)：在高能球磨和微氧化氣氛下進行700 ℃，1 h晶化處理后，Nd8Fe92、Nd8Fe89Si3和Nd8Fe87S5粉體組織均由α-Fe、Nd2O3和Fe17Nd2相組成，加入Si后，粉體的Fe17Nd2相對量增加；Nd8Fe92粉體的反射率最小值約為–4.5 dB，吸收峰頻率約為4.4 GHz，加入Si后，粉體的反射率最小值降低, 吸收峰頻率升高, 吸波帶寬變寬；Nd8Fe92粉體以介電損耗為主，Nd8Fe89Si3和Nd8Fe87Si5粉體以磁損耗為主

    Abstract:

    The NdFe absorbing powder was prepared by high-energy ball-milling and crystallization heat treatment. The influence of Si contents on the absorbing properties of NdFe powder was investigated. The result shows that the microstructures of Nd8Fe92, Nd8Fe89Si3 and Nd8Fe87Si5 powders consist of α-Fe, Nd2O3 and Fe17Nd2 phase after high-energy milling and 700 ℃, 1 h crystallization heat treatment in a micro-oxidation atmosphere. The relative amount of Fe17Nd2 phase increases after adding Si. The minimum reflectance of Nd8Fe92 powder is -4.5 dB, the frequency of the absorption peak is 4.4 GHz. After adding Si the minimum reflectance of powder decreases, while the frequency of the absorption peak increases and the absorption band of NdFe powder is widened. Nd8Fe92 powder takes dielectric loss, as main loss, while Nd8Fe89Si3 and Nd8Fe87Si5 powder take magnetic loss as main loss

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林培豪,楊 濤,潘順康,王 磊. Si含量對NdFe材料微波吸收特性的影響[J].稀有金屬材料與工程,2012,41(4):645~648.[Lin Peihao, Yang Tao, Pan Shunkang, Wang Lei. Effect of Si Contents on Microwave Absorbing Properties of NdFe Materials[J]. Rare Metal Materials and Engineering,2012,41(4):645~648.]
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  • 收稿日期:2011-04-08
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