Ni 0.5 ?Zn 0.4 ?X 0.1 ?Fe 2 O 4   (X=Cu, Mg, Mn)-Rubber Composite의 전파흡수특성에 관한 연구

임희대; 윤국태; 이찬규; H.D. Im; K.T. Youn; C.G. Lee

Korean Journal of Materials Research, Vol.9, No.12, 1234-1239, December, 1999

Export Citation

Ni 0.5 ?Zn 0.4 ?X 0.1 ?Fe 2 O 4 (X=Cu, Mg, Mn)-Rubber Composite의 전파흡수특성에 관한 연구

Electromagetic Wave Absorbing Properties of Ni 0.5 ?Zn 0.4 ?X 0.1 ?Fe 2 O 4 (X=Cu, Mg, Mn)-Rubber Composite

임희대, 윤국태, 이찬규

창원대학교 금속재료공학과

H.D. Im, K.T. Youn, and C.G. Lee

Dept. of Metallurgy and Materials Science, Changwon National University, #9 Sarim-dong, Changwon, Kyungnam 641-773, Korea

초록

Ni 0.5 ?Zn 0.4 ?X 0.1 ?Fe 2 O 4 의 조성에서 X를 각각 Cu, Mg, Mn으로 치환시켜 치환원소에 따른 결정구조와 형상, 입도 및 자기적 성질을 비교 분석하여고, Network Analyzer을 이용하여 Ni 0.5 ?Zn 0.4 ?X 0.1 ?Fe 2 O 4 -Rubber Composite의 재료정수 및 전파흡수특성에 대하여 비교 조사하였다. 치환원소에 관계없이 동일한 결정구조와 형상 및 입도를 나타냈고, VSM 분석결과 치환원소에 관계없이 동일한 자화값을 가지며, Mg로 치환된 경우 가장 큰 보자력과 자기이력손실을 나타냈다. 또한 Mn으로 치환된 경우 가장 높은 유전손실( ε r "/ε ′ r )을, Cu로 치환된 경우에는 가장 큰 자기손실( μ r "/μ ′ r )을 나타냈다. 4mm의 두께로 제조한 Compos-Composite에서는 Mg로 치환된 시료가 2GHz에서 -40dB이상의 가장 우수한 전파흡수특성을 나타내었다.

Electromagnetic wave asorbing properties of the Ni 0.5 ?Zn 0.4 ?X 0.1 ?Fe 2 O 4 , where X was replaced by substitution elements Cu, Mg, Mn, have been studied. The structure, shape, size and magnetic properties of the Ni 0.5 ?Zn 0.4 ?X 0.1 ?Fe 2 O 4 were analyzed by XRD, SEM, VSM. The relative complex permittivity, permeability, and electromagnetic wave absorbing properties were measured by Network Analyzer. The structure, shape, size and magnetization value of the Ni 0.5 ?Zn 0.4 ?X 0.1 ?Fe 2 O 4 were found to be similar in spite of substitution elements. The coercive force and hysteresis-loss showed maximum value when Mg was substituted for X. The dielectric loss( ε r "/ε ′ r ) was found to be maximum value when Mn was substituted for X. Also the magnetic loss( μ r "/μ ′ r } was found to be maximum with Cu substitution. The electromagnetica wave absorbing property of the Ni 0.5 ?Zn 0.4 ?X 0.1 ?Fe 2 O 4 -Rubber composite with 4mm thickness was excellent as over - 40dB at 9GHz, and the Ni 0.5 ?Zn 0.4 ?X 0.1 ?Fe 2 O 4 -Rubber composite with 8mm thickness was over-40dB at 2GHz. Those composites also showed superior microwave absorbing properties.

[References]

NEC Technical Report, 37 (1984)
電子部品, 4 (1989)
김태수, 산업기술정보원, 3 (1991)
Naito Y, Suetake K, IEEE Trans. MTT, 19(1), 65 (1971)
조성백, 오재희, 요업학회지, 32(1), 25 (1995)
최윤호, 신명승, 한승기, 한영호, 요업학회지, 43(6), 561 (1997)
고상기, 김병호, 김경용, 요업학회지, 34(10), 1074 (1997)
김성재, 정명독, 백종규, 요업학회지, 32(1), 1 (1995)
Johnson MT, Visser EG, IEEE Trans. Magn., 26, 1987 (1990)
Smit J, Wijin HPJ, Philip's Technical Libraray, 268 (1959)
Amin MB, James JR, Radio Electro Eng., 51(5), 209 (1981)

[1] NEC Technical Report, 37 (1984)

[2] 電子部品, 4 (1989)

[3] 김태수, 산업기술정보원, 3 (1991)

[4] Naito Y, Suetake K, IEEE Trans. MTT, 19(1), 65 (1971)

[5] 조성백, 오재희, 요업학회지, 32(1), 25 (1995)

[6] 최윤호, 신명승, 한승기, 한영호, 요업학회지, 43(6), 561 (1997)

[7] 고상기, 김병호, 김경용, 요업학회지, 34(10), 1074 (1997)

[8] 김성재, 정명독, 백종규, 요업학회지, 32(1), 1 (1995)

[9] Johnson MT, Visser EG, IEEE Trans. Magn., 26, 1987 (1990)

[10] Smit J, Wijin HPJ, Philip's Technical Libraray, 268 (1959)

[11] Amin MB, James JR, Radio Electro Eng., 51(5), 209 (1981)