하소온도가 M형 페라이트 복합재의 전자파 흡수 특성에 미치는 영향
Effect of Calcination Temperature on Electromagnetic Wave Absorption Properties of M-type Ferrite Composite
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본 논문에서는 밀리미터파 대역 전자파 흡수 소재로 알려진 M형 육방정계 페라이트의 하소 온도에 따른 전자기적 특성과 전자파 흡수 특성에 대해 분석하였다. 용융염 기반 Sol-gel법으로 합성된 M형 페라이트는 850 °C 이상의 하소 온도에서 모두 단상의 M형 결정구조를 가지며 하소 온도가 증가함에 따라 합성된 입자의 크기가 증가하였다. 또한 하소 온도가 증가함에 따라 포화자화는 조금씩 증가하는 반면 보자력은 1050 °C에서 최대값을 보이며 그 이상의 하소 온도에서 급격히 감소하였다. M형 페라이트가 70 wt% 포함된 TPU 복합재를 제조한 후 강자성 공명이 발생되는 Q(33-50 GHz) 및 V(50-75 GHz) band 대역에서 복수 유전율/ 투자율을 측정한 결과 약 50 GHz 주파수 대역에서 강자성 공명에 의한 강한 자성손실을 확인하였다. 측정된 결과를 바탕으로 M형 페라이트 복합재의 반사손실을 계산한 결과 1250°C의 온도에서 하소된 M형 페라이트 복합재는 약 0.5 mm의 얇은 두께로도 강자성 공명이 일어나는 52 GHz 주파수 대역에서 -20 dB 이상의 우수한 전자파 흡수 성능을 보였다.
Abstract
In this study, we investigated the electromagnetic properties and microwave absorption characteristics of M-type hexagonal ferrites, which are known as millimeter-wave absorbing materials, according to their calcination temperature. The M-type ferrites synthesized using a molten salt-based sol-gel method exhibited a single-phase M-type crystal structure at calcination temperatures above 850°C. The synthesized particle size increased as well with the calcination temperature. Saturation magnetization increased gradually with increasing calcination temperature, but coercivity reached a maximum at 1050°C and then rapidly decreased. After preparing a thermoplastic polyurethane (TPU) composite containing 70 wt% of M-type ferrites, we measured the complex permittivity and permeability in the Q-band (33-50 GHz) and V-band (50-75 GHz) frequency ranges, where ferromagnetic resonance occurred. Strong magnetic loss from ferromagnetic resonance occurred in the 50 GHz band for all composite samples. Based on the measured results, we calculated the reflection loss of the TPU/M-type ferrite composite. By calculating the reflection loss of the M-type ferrite composite, the M-type ferrite calcined at 1250°C showed excellent electromagnetic wave absorption performance of more than -20 dB at 52 GHz with a thickness of about 0.5 mm.
참고문헌 (23)
- Shahzad, F., "Electromagnetic Interference Shielding with 2D Transition Metal Carbides(MXenes)", Science, 353(6304), pp.1137~1140 (2016)
- Wu, N., "Review on the Electromagnetic Interference Shielding Properties of Carbon Based Materials and Their Novel Composites : Recent Progress, Challenges and Prospects", Carbon, 176, pp.88~105 (2021)
- Yang, R., "Promising PVDF-CNT-Graphene-NiCo Chains Composite Films with Excellent Electromagnetic Interference Shielding Performance", Journal of Alloys and Compounds, 908, pp.164538~ (2022)
- 최광식, "X-Band 영역에서의 세라믹", 샌더스트-알루미노실리케이트 복합재의 초고온 전자파 흡수 거동, 2022, pp.35(3), 201~215[DOI]
- 박병진, "전도성 그리드를 활용한 전자파 흡수차폐", 방열 복합소재 필름, 2022, pp.35(3), 175~181[DOI]
- 이균배, "분산제에 따른 자성금속 무전해도금 기반 그래핀 분산 특성 및복합재의 전자파 차폐 특성 연구", Composites Research, 31(3), pp.111~116 (2018), 한국복합재료학회
- Wu, Y., "PVB Coating Efficiently Improves the High Stability of EMI Shielding Fabric with Cu", Ni, 2022, pp.5(1), 71~82
- Kim, D., "Interconnected Network of Ag and Cu in Bioplastics for Ultrahigh Electromagnetic Interference Shielding Efficiency with High Thermal Conductivity", Composites Communications, 30, pp.101093~ (2022)
- Kumar, R., "Recent Progress on Carbon-based Composite Materials for Microwave Electromagnetic Interference Shielding", Carbon, 177, pp.304~331 (2021)
- Song, P., "Lightweight, Flexible Cellulose-Derived Carbon Aerogel@Reduced Graphene Oxide", PDMS Composites with Outstanding EMI Shielding Performances and Excellent Thermal Conductivities, 2021, pp.13(1), 91~
- Cheng, H., "Ultrathin Flexible Poly(vinylidene fluoride)", MXene, Advanced Composites and Hybrid Materials, pp.2021, 4(3)[DOI]
- Yin, J., "Flexible 3D Porous Graphene Film Decorated with Nickel Nanoparticles for Absorptiondominated Electromagnetic Interference Shielding", Chemical Engineering Journal, 421, pp.129763~ (2021)
- Ryu, S. H., "Absorption-dominant, Low Reflection EMI Shielding Materials with Integrated Metal Mesh", TPU, Chemical Engineering Journal, pp.2022, 428[DOI]
- Zong, Z., "Three-dimensional Macroporous Hybrid Carbon Aerogel with Heterogeneous Structure Derived from MXene", cellulose Aerogel for Absorption-dominant Electromagnetic Interference Shielding and Excellent Thermal Insulation Performance, 2022, pp.619, 96~105
- Suthar, M., "Structural, Electromagnetic, and Kuband Absorption Characterization of La-Mg Substituted Y-type Barium Hexaferrite for EMI Shielding Application", Materials Science and Engineering : B, 283, pp.115801~ (2022)
- Wang, B., "A Review on Carbon", magnetic Metal Composites for Microwave Absorption, 2021, pp.86, 91~109
- Zahid, M., "M-Type Barium Hexaferrite-Based Nanocomposites for EMI Shielding Application : A Review", Journal of Superconductivity and Novel Magnetism, 34(4), pp.1019~1045 (2021)
- He, F., "The Ordered Mesoporous Barium Ferrite Compounded with Nitrogen-doped Reduced Graphene Oxide for Microwave Absorption Materials", Small, 19(32), pp.2205644~ (2023)
- Lim, E., "Control of Electromagnetic Wave Absorption Properties in La-Co-Ti Substituted M-type Hexaferrite-epoxy Composite", Journal of Magnetism and Magnetic Materials, 517(1), pp.167397~ (2021)
- Ramezanzaeh, G., "Electromagnetic Wave Reflection Loss and Magnetic Properties of M-type SrFe12-x(Mn0. 5Sn0. 5)xO19 Hexagonal Ferrite Nanoparticle in the Ku Microwave Band", Ceramics International, 43(13), pp.10231~ (2017)
- Wang, X., "Effect of Sintering Temperature on the Microstructure, Magnetics, and Microwave Absorption Properties of M-type Barium Ferrite Nanoparticles Prepared by Sol-gel Method", Journal of Materials Science : Materials in Electronics, 34, pp.1045~ (2023)
- Pullar, R. C., "Hexagonal Ferrites : A Review of the Synthesis, Properties and Applications of Hexaferrite Ceramics", Progress in Materials Science, 57(7), pp.1191~1334 (2012)
- Gorbachev, E. A., "Hexaferrite Materials Displaying Ultra-high Coercivity and Sub-terahertz Ferromagnetic Resonance Frequencies", Materials Today, 32, pp.13~18 (2020)