用铁砂制备尖晶石型铁氧体基微波吸收材料
摘要
本文通过测量含有各种介质的尖晶石型铁氧体废料在7.30—11.30GHz内的微波吸收特性，研究了不同磁性与电性的介质对尖晶石型铁氧体吸波性能的影响。在此基础上，采用传统陶瓷工艺，以铁砂为原料制备尖晶石型铁氧体基复合吸波材料并通过添加适当种类的介质制得尖晶石型铁氧体基混合吸波材料，提高了尖晶石型铁氧体吸波材料的性能。同时，初步研究了磁织构化处理、双层结构及介质膜对尖晶石型铁氧体基混合吸波材料性能的影响。
实验发现：(1)不同磁性与电性的介质对尖晶石型铁氧体吸波特性的影响不同；(2)磁织构化处理对含有六角晶系铁氧体单畴颗粒的尖晶石型铁氧体基混合吸波材料的性能影响很大，可以改变匹配厚度、面密度与吸收峰峰位，提高吸收量与10dB带宽；(3)对于双层材料，层间耦合作用会影响其吸波性能，降低匹配厚度与面密度，提高吸收峰峰位。介质膜的加入则会影响层间耦合作用，减弱层间耦合作用对材料吸波性能的主导作用，提高吸收量，降低匹配厚度、面密度与10dB带宽。
通过实验，我们用铁砂等制得性能优良的尖晶石型铁氧体基混合吸波材料，其匹配厚度3.11mm，面密度0.73g／cm~2，最大吸收量30.84dB，10dB带宽3.11GHz。通过磁织构化处理，提高了其10dB带宽，使其吸收量在7.30—11.30GHz内均高于10dB。
In this paper, through measuring the microwave-absorbing properties of the waste spinel ferrite which contained different magnetic and dielectric mediums in the frequency range of 7.30-11.30GHz, we studied the influence of each medium on those properties. According to the above-mentioned analyses, standard ceramic techniques were adopted to prepare spinel ferrite-based composite materials with iron-sand and the microwave-absorbing properties of spinel ferrite were improved through adding some appropriate mediums into those composite materials. In addition, we also studied the influence of magnetic texture treatment, double-layer structure and medium film on the spinel ferrite-based mixed material.
The experiments showed us: firstly, mediums with different magnetic and dielectric properties had different influence on the microwave-absorbing properties of spinel ferrite; secondly, magnetic texture treatment greatly affected the microwave-absorbing properties of the spinel ferrite-based mixed material which contained single-domain particles of hexagonal ferrite, changing the matching thickness, the density of area and the position of absorption peaks and increasing the absorption quantity and the 10dB bandwidth; thirdly, the coupling effect between different layers affected the microwave-absorbing properties of the double-layer spinel ferrite-based mixed material, decreasing its matching thickness and density of area and increasing the position of absorption peaks. Moreover, the medium film affected the coupling effect, weakening its leading effect on the microwave-absorbing properties of materials, increasing the absorption quantity and decreasing the matching thickness ,the density of area and the lOdB bandwidth.
After some experiments, a kind of spinel ferrite-based mixed material with fine properties was obtained. The matching thickness was about 3.11mm. The density of area was about 0.73g/cm2, The maximum absorption quantity was about 30.84dB. And the lOdB bandwidth was about 3.11 GHz. Through the magnetic texture treatment, its 1 OdB bandwidth was increased to cover the measuring frequency range of 7.30 - 11 .30GHz.
实验发现：(1)不同磁性与电性的介质对尖晶石型铁氧体吸波特性的影响不同；(2)磁织构化处理对含有六角晶系铁氧体单畴颗粒的尖晶石型铁氧体基混合吸波材料的性能影响很大，可以改变匹配厚度、面密度与吸收峰峰位，提高吸收量与10dB带宽；(3)对于双层材料，层间耦合作用会影响其吸波性能，降低匹配厚度与面密度，提高吸收峰峰位。介质膜的加入则会影响层间耦合作用，减弱层间耦合作用对材料吸波性能的主导作用，提高吸收量，降低匹配厚度、面密度与10dB带宽。
通过实验，我们用铁砂等制得性能优良的尖晶石型铁氧体基混合吸波材料，其匹配厚度3.11mm，面密度0.73g／cm~2，最大吸收量30.84dB，10dB带宽3.11GHz。通过磁织构化处理，提高了其10dB带宽，使其吸收量在7.30—11.30GHz内均高于10dB。
In this paper, through measuring the microwave-absorbing properties of the waste spinel ferrite which contained different magnetic and dielectric mediums in the frequency range of 7.30-11.30GHz, we studied the influence of each medium on those properties. According to the above-mentioned analyses, standard ceramic techniques were adopted to prepare spinel ferrite-based composite materials with iron-sand and the microwave-absorbing properties of spinel ferrite were improved through adding some appropriate mediums into those composite materials. In addition, we also studied the influence of magnetic texture treatment, double-layer structure and medium film on the spinel ferrite-based mixed material.
The experiments showed us: firstly, mediums with different magnetic and dielectric properties had different influence on the microwave-absorbing properties of spinel ferrite; secondly, magnetic texture treatment greatly affected the microwave-absorbing properties of the spinel ferrite-based mixed material which contained single-domain particles of hexagonal ferrite, changing the matching thickness, the density of area and the position of absorption peaks and increasing the absorption quantity and the 10dB bandwidth; thirdly, the coupling effect between different layers affected the microwave-absorbing properties of the double-layer spinel ferrite-based mixed material, decreasing its matching thickness and density of area and increasing the position of absorption peaks. Moreover, the medium film affected the coupling effect, weakening its leading effect on the microwave-absorbing properties of materials, increasing the absorption quantity and decreasing the matching thickness ,the density of area and the lOdB bandwidth.
After some experiments, a kind of spinel ferrite-based mixed material with fine properties was obtained. The matching thickness was about 3.11mm. The density of area was about 0.73g/cm2, The maximum absorption quantity was about 30.84dB. And the lOdB bandwidth was about 3.11 GHz. Through the magnetic texture treatment, its 1 OdB bandwidth was increased to cover the measuring frequency range of 7.30 - 11 .30GHz.
引文
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[2]吴明忠．[J]．磁性材料及器件，1997，28(2)：26-30．
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[27]卢荣章．电磁场与微波基础[M]．北京：高等教育出版社，1985．
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[35]娄明连，阚涛，吴晓娟．[J]．功能材料，2002，33(2)：152-153．
[36]吴松安，余燕．[J]．湘潭矿业学院学报，2000，15(1)：90-94．
[37]娄明连，阚涛．[J]．磁性材料及器件，1998，29(3)：22-24．
[38]阚涛，娄明连．[J]．磁性材料及器件，2001，32(6)：18-21．
[39]李国栋，云月厚，邰显康，等．[J]．磁性材料及器件，2001，32(5)：14-16．
[40]马昌贵．[J]．磁性材料及器件，2000，31(3)：31-35．
[41]宛德福，马兴隆．磁性物理学[M]．成都：电子科技大学出版社，1994．
[42]李荫远，李国栋．铁氧体物理学[M]．北京：科学出版社，1962．
[43]Ned Kow I,et al.[J].IEEE Trans. on Magnetics, 1994,36(4):4545-4547.
[44]Naito Y.[J].ibid.,ICF-1,1971:558-563.
[2]吴明忠．[J]．磁性材料及器件，1997，28(2)：26-30．
[3]Kotsuka, Youji.[A].Proc.,IEEE International Symposium on Electromagnetic Compatibility. [C] . Tokyo:IEEE Publication, 1989:780～783.
[4]Kimm S S,Cheong G M,Yoonbi.[J].Joumal De Physique, 1997,7(1):425-426.
[5]Kimm S S,Kwon K I,Gueonk I,et al.[J].IEEE Trans. on Magnetics, 1991,27(5): 5462-5464.
[6]Mirlaheri Seyed Abdullah,Yin Jifang,Seki Hajime.[J].Proc.,IEEE International Symposium on Electromagnetic Compatibility[C]. Tokyo: IEEE Publication, 1989:784-787.
[7]Kumara.[A].Proc.,IEEE Conference on Electrical Insulation and Dielectric phenomena[C].New York: [s.n.], 1989:403-408.
[8]Musai H M,Hahnh T, Rush G G.[J].J APPL Phys, 1988,63(8):3768-3770.
[9]Nedkov I,Petkov A,Kaipov V. [J] .IEEE Trans. on Magnetics, 1990,26(5):1483-1484.
[10]Shinj Y, Oh J H.[J].IEEE Trans. on Magnetics, 1993,29(5):3437-3439.
[11]娄明连，阚涛，陆兴远．[J]．磁性材料及器件，2000，31(3)：22-25．
[12]Natio,Sentaile. [J].IEEE Trans. on Magnetics, 1997,19(1):65-72.
[13]Jha V, Banthia A K.[J].Proc.,ICF-5,1989:961-965.
[14]Aiyar R, et al. [J].Proc.,ICF-5,1989:955-960.
[15]丁明，曾桓兴．[J]．磁性材料及器件，1997，28(4)：18-21．
[16]娄明连，彭军．[J]．磁性材料及器件，1996，27(4)：13-16．
[17]娄明连，阚涛，娄天红．[J]．功能材料，1997，28(4)：383-385．
[18]阚涛，娄明连．[J]．功能材料，1998，29(5)：474-476．
[19]娄明连，阚涛，郑林振．[J]．磁性材料及器件，1998，29(1)：36-40．
[20]娄明连，阚涛．[J]．材料，2000，31(2)：170-171．
[21]张有纲．磁性材料[M]．成都：成都电讯工程学院出版社，1998．
[22]阳开新．[J]．磁性材料及器件，1996，27(3)：19-23．
[23]谭锐．[J]．磁性材料及器件，2000，31(1)：28-32．
[24]王海．[J]．上海航天，1999，1：55-59．
[25]刘发来．[J]．航天电子技术，1995，3：36-42．
[26]都有为．铁氧体[M]．江苏：江苏科学技术出版社，1996．
[27]卢荣章．电磁场与微波基础[M]．北京：高等教育出版社，1985．
[28]姚学标，胡国光，尹萍，李文凤．[J]．微波学报，1999，15(2)：160-166．
[29]廖绍彬．铁磁学(下册)[M]．北京：科学出版社，1998．
[30]蒋仁培，等．[J]．第一界全国磁性材料应用技术文集，1993，9月．
[31]何水校．[J]．磁性材料及器件，2001，32(1)：20-22．
[32]娄明连，阚涛．[J]．功能材料，2000，31(1)：103-104．
[33]娄明连，阚涛．[J]．磁性材料及器件，1999，30(1)：44-48．
[34]周敏，等．[J]．西安工业学院学报，2000，20(4)：296-302．
[35]娄明连，阚涛，吴晓娟．[J]．功能材料，2002，33(2)：152-153．
[36]吴松安，余燕．[J]．湘潭矿业学院学报，2000，15(1)：90-94．
[37]娄明连，阚涛．[J]．磁性材料及器件，1998，29(3)：22-24．
[38]阚涛，娄明连．[J]．磁性材料及器件，2001，32(6)：18-21．
[39]李国栋，云月厚，邰显康，等．[J]．磁性材料及器件，2001，32(5)：14-16．
[40]马昌贵．[J]．磁性材料及器件，2000，31(3)：31-35．
[41]宛德福，马兴隆．磁性物理学[M]．成都：电子科技大学出版社，1994．
[42]李荫远，李国栋．铁氧体物理学[M]．北京：科学出版社，1962．
[43]Ned Kow I,et al.[J].IEEE Trans. on Magnetics, 1994,36(4):4545-4547.
[44]Naito Y.[J].ibid.,ICF-1,1971:558-563.