$Ni_{0.5}Cu_{0.1}Zn_{0.4}Fe_2O_4$ Ferrite-Rubber Composite의 전파흡수특성에 미치는 열처리 온도의 영향 및 Carbon 첨가효과

Effect of Carbon Addition and Influence of Heat-treatment Temperature on Electromagnetic Wave Absorbing Properties of $Ni_{0.5}Cu_{0.1}Zn_{0.4}Fe_2O_4$-Rubber Composite

  • 발행 : 2001.02.01

초록

The structure, shape, size, and magnetic properties of Ni$_{0.5}$Cu$_{0.1}$Zn$_{0.4}$Fe$_2$O$_4$ have been investigated as a function of annealing temperatures. In order to control the microwave absorbing properties of ferrite-rubber composite and the complex losses (magnetic loss and conduction loss), the effect of carbon addition was also studied. It was found that the coercive force decreased with increasing heat-treatment temperatures. Relative complex permeability and reflection loss were measured by the network analyzer. As a result, the natural resonance occurred in the low frequency tinge, and the matching frequency of the ferrite-rubber composite prepared at 130$0^{\circ}C$ was found to be lower. As heat-treatment temperatures were increased, the magnetic loss ($\mu$$_{r}$", $\mu$$_{r}$′) and the dielectric loss ($\varepsilon$$_{r}$"/$\varepsilon$$_{r}$′) were increased. It was caused that the absorption characteristics of the absorber were improved. The conduction loss and magnetic loss were expected to be occurred together because two matching frequencies were shown with carbon addition. It was confirmed that the matching frequency of the microwave absorber could be controlled by controlling heat-treatment temperatures and carbon additions.ons.tions.

키워드

참고문헌

  1. Am. Ceram. Soc. Bull. v.66 no.10 K. Ishino;Y. Narumiya
  2. Marcel Dekker(1st Ed.) Electromagnetic compatibility David A. Weston
  3. 전파급수체と전파음실 關康雄
  4. Korean J. Mat. Res. v.9 no.12 H.D. Im;K.T. Youn;C.G. Lee
  5. J. of Kor. Cera. Soc. v.31 no.1 J. Y. Shin;J.H. Oh
  6. 電子通信學會論文集 v.52-B no.4 內藤喜誌;末武國弘;藤原英二;佐藤正明
  7. IEEE Trans. MTT. v.19 no.1 Y. Natio;K. Suetake
  8. 電子材料シリ-ズフェライト 平賀貞太卽;奧谷克伸;尾島輝彦
  9. IEEE Trans. Magn. v.26 no.1987 M.T. Johnson;E.G. Visser
  10. ニュ-セラミックスの發展 柳田단明(外 增補)
  11. 化學と工業 v.28 no.9 石野建;橋本康雄
  12. Introduction to Magnetic Materials B.D. Cullity
  13. Physics of Ferromagnetism(2nd Ed.) S. Chikazumi
  14. Philip's Technical Library J. Smit;H.P.J. Wijn
  15. 電波及收體 內藤喜之
  16. Soft Ferrite-properties and Applications(2nd Ed.) E.C. Snelling
  17. 未踏加工技術協會 編, 신시대으 자성재료 工業調査會
  18. 신시대의 자성재료 未踏加工技術協會(編)