| 引用本文: | 刘延坤,冯玉杰,武晓威,王岩.M型钡铁氧体制备及吸波特性研究[J].材料科学与工艺,2010,18(2):262-266.DOI:10.11951/j.issn.1005-0299.20100225. |
| LIU Yan-kun,FENG Yu-jie,WU Xiao-wei,WANG Yan.Preparation and electromagnetic wave absorption properties of M-type barium ferrite[J].Materials Science and Technology,2010,18(2):262-266.DOI:10.11951/j.issn.1005-0299.20100225. |
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| 摘要: |
| 为进一步研究M型铁氧体的吸波性能,以硝酸铁、硝酸钡为原料,采用溶胶凝胶自蔓延法,制备了M型钡铁氧体纳米粉.借助XRD、TG-DTA、SEM、矢量网络分析仪对铁氧体材料的晶体结构、凝胶热分解过程、表面形貌及微波吸收特性进行了研究,同时根据传输线原理,通过理论计算预测了材料的最佳匹配厚度.研究表明:所制得的铁氧体为晶相单一的M型钡铁氧体,频率在6～18GHz,预测最佳匹配厚度为0.35cm,最小反射损耗达-13.5dB,反射损耗小于-10dB的带宽为0.7GHz,说明M型钡铁氧体具有电磁波吸收效应. |
| 关键词: M型钡铁氧体 溶胶凝胶自蔓延法 电磁波吸收特性 |
| DOI：10.11951/j.issn.1005-0299.20100225 |
| 分类号:TM277 |
| 基金项目: |
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| Preparation and electromagnetic wave absorption properties of M-type barium ferrite |
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LIU Yan-kun, FENG Yu-jie, WU Xiao-wei, WANG Yan
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State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology,Harbin 150090,China
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| Abstract: |
| Hexagonal barium ferrite powders were prepared by sol-gel auto-combustion method in order to research the microwave absorption properties of M-type ferrite. The crystal structure,decompounding process, micrograph and microwave absorption properties of the sample were studied by means of XRD,TG-DTA, SEM and vector network analyzer. According to the transmission line theory,the reflection loss of electromagnetic radiation was calculated and the optimum thickness was predicted. The study shows that the prepared sample is found to be M-type barium ferrite with single phase. The optimum thickness is 0. 35 cm,the minimum reflection loss reaches-13. 5 dB,and the bandwidth is 0. 7 GHz when the reflection loss is less than-10 dB. It means that M-type barium ferrite has good microwave absorption capability. |
| Key words: M-type barium ferrite sol-gel auto-combustion method electromagnetic wave absorption properties |
