• Title/Summary/Keyword: Ni-ferrite

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A Study on Electromagnetic Wave Absorbing Properties of $Ni_{0.6}-A_{0.1}-Zn_{0.3}{\cdot}Fe_2O_4$ Ferrite-Rubber Composite by the variation of using amount of Ferrite ($Ni_{0.6}-A_{0.1}-Zn_{0.3}{\cdot}Fe_2O_4$ Ferrite-Rubber Composite의 Ferrite 함량에 따른 전파흡수특성)

  • Park, Youn-Joon;SaGong, Geon
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2000.05b
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    • pp.162-166
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    • 2000

  • In this paper, we studied the relation between using amount of Ferrite and electromagnetic wave absorbing properties of ferrite-rubber composite. The variation of using amount of Ferrite have been 52 wt.% ~ 62 wt.%. As s result, it has been shown that the electromagnetic wave absorbing properties of ferrite-rubber composite are related to the using amount of Ferrite in composite. And, we can control electromagnetic wave absorbing properties of ferrite-rubber composite by the control of using amount of Ferrite.

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Electromagnetic Wave Absorbing Properties of $Ni_{0.5}-A_{0.1}-Zn_{0.4}{\cdot}Fe_2O_4$ Ferrite-Rubber Composite with amounts of a Ferrite (Ferrite 함량변화에 대한 $Ni_{0.5}-A_{0.1}-Zn_{0.4}{\cdot}Fe_2O_4$ Ferrite-Rubber Composite의 전파흡수특성)

  • Park, Y.J.;Shin, K.H.;Heo, J.;SaGong, G.
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2002.05a
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    • pp.45-49
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    • 2002

  • In this paper, we have studied about electromagnetic wave absorbing properties of ferrite-rubber composite with a variation of ferrite. Amounts of ferrite in a composite absorber were changed from 52 wt.% to 62 wt.%. As a result, it has been shown that the electromagnetic wave absorbing properties of ferrite-rubber composite are related to the amount of ferrite in composite absorber. As a summary, it could be controled the electromagnetic wave absorbing property of ferrite-rubber composite by changing some kinds of annex A and amount of ferrite.

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A Study on Electromagnetic Wave Absorbing Properties of Ni-Mn-Zn Spinel Ferrite-Rubber Composite (Ni-Mn-Zn Spinel Ferrite-Rubber Composite의 전파흡수특성에 관한 연구)

  • 박연준;김동일
    • Journal of the Korean Institute of Navigation
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    • v.23 no.1
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    • pp.15-22
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    • 1999

  • In this paper, ferrite-rubber composite has been studied in order to apply to RF-A-PF in a super wideband electromagnetic absorber in RF-A-PF type, which can be used for a general purpose anechoic chamber. $Ni_x - Mn_0.1 - Zn_{(1-x-0.1)}ㆍFe_2O_4$ ferrite powder has been fabricated, then, using this, 〔$Ni_x - Mn_0.1 - Zn_{(1-x-0.1)}ㆍFe_2O_4$〕-Rubber composite for RF-layer in the RF-A-PF type absorber has been fabricated and it's characteristics have been analyzed. As a result, it has been clearly shown that the 〔$Ni_x - Mn_0.1 - Zn_{(1-x-0.1)}ㆍFe_2O_4$〕-Rubber composite has excellent electromagnetic wave absorbing properties.

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Evaluation of Spin Direction in Ferrite-Plated Films by $Fe^{57}$ Conversion Electron Mossbauer Spectroscopy

  • Shirasaki, Fumio;Kitamoto, Yoshitaka;Kantake, Shusuke;Abe, Masanori
    • The Korean Journal of Ceramics
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    • v.6 no.4
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    • pp.405-407
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    • 2000

  • Polycrystalline films of Ni- and Co-ferrites films are prepared from aqueous solution at $90^{\circ}C$ by ferrite plating, which are subjected to Fe$^57$ conversion electron Mossbauer spectroscopy in backscatter mode. The average angle of Fe spins relative to the film plane is evaluated as 18 degree and 82 degree for the Ni- and Co-ferrite films, respectively, indicating a prominent magnetic anisotropy parallel and perpendicular to the film plane. It was also verified by the magnetization measurements.

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