CERAMICS INTERNATIONAL
·
2015
·
IF 2.605
Peijiang Liu,Zhengjun Yao,Jintang Zhou
A novel reduced graphene oxide/Ni 0.4 Zn 0.4 Co 0.2 Fe 2 O 4 nanocomposite was firstly prepared by a facile and efficient mechanical mixing method with good safety, high controllability and excellent quantifiability. The microstructure and morphology were examined by FTIR, XRD , TG, SEM and EDS. The measured electromagnetic parameters indicated that the rGO/NZCF-15 composite exhibited excellent microwave absorption properties and extraordinary broad absorption bandwidths due to both dielectric loss and magnetic loss. The minimum reflection loss of the rGO/NZCF-15 composite was −38.7 dB at 15.2 GHz for a layer of only 1.9 mm thickness, and the bandwidth corresponding to R L less than −10 dB can reach 6.2 GHz (11.8–18.0 GHz). This novel composite with such strong microwave absorption could be used as a new candidate for selective frequency shielding and lightweight EM wave absorbing material.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER BULLETIN
·
2018
·Vol. 76
·期 6
·3113-3125
·
IF 1.589
Lei Yiming,Yao Zhengjun,Lin Haiyan,Zhou Jintang,liu Peijiang,Qi Tongbaihui,Ning Yong,Shen Cheng
A novel polyaniline/Ni 0.4 Zn 0.4 Co 0.2 Fe 2 O 4 (PANI/NZCF) composite was synthesized by in situ polymerization of aniline in the presence of NZCF. The studies of structural, morphological and surface chemical bonding states were performed by X-ray diffraction, scanning electron microscopy and Fourier transform-infrared spectrometry, respectively. It was found that greater reflection loss and wider absorption bandwidths were possible by adjusting the mass ratio of NZCF to PANI on account of electromagnetic loss and impedance matching. The highest reflection loss ( R L ) was − 40 dB at the frequency 15.8 GHz for the PANI/NZCF composite when the effective absorption frequency at which R L < − 10 dB was in the range of 13.5–18 GHz with an absorber thickness of 1.7 mm at the mass ratio of 2:1. These effects are due to the urchin-like structure when compared to traditional encapsulation structures. Therefore, the above findings show that the PANI/NZCF composite with negligible thickness and strong absorption properties has great potential in the application of electromagnetic shielding and microwave absorbing.
研究领域:
材料科学
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电磁学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 114
·93739-93748
·
IF 3.84
Peijiang Liu,Zhengjun Yao,Jintang Zhou
For the first time, silane coupling agent modified Ni0.4Zn0.4Co0.2Fe2O4 ferrite covered with reduced graphene oxide nanocomposites were synthesized by a simple, efficient and controllable three-step method. The structural characteristics were investigated by Fourier transform infrared spectra, X-ray diffraction, elemental analysis, thermal gravity analysis, field-emission scanning electron microscopy and transmission electron microscopy. The results indicated that the coupling agent modified ferrite particles were firmly and uniformly covered on the rGO nanosheets. Microwave adsorption properties were also performed at room temperature in the frequency range of 2–18 GHz. The minimum reflection loss of rGO/APTS–NZCF composites can reach −51.8 dB at 15.1 GHz with the thickness of 2.1 mm, and the effective bandwidth corresponding to RL less than −10 dB was 5.3 GHz (from 12.7 to 18 GHz). The excellent microwave adsorption properties indicate this novel composite could be used as a new candidate for lightweight electromagnetic wave adsorption material.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Jiahao Wang,Yang Li,Ruizhi Wu,Lin Xu,Zhen Zhang,Jing Feng,Jinghuai Zhang,Legan Hou,Yunlei Jiao
Mg-Li matrix composite containing Ni 0.4 Zn 0.4 Co 0.2 Fe 2 O 4 (NZCF) was fabricated by multi-layer composite rolling (MCR). Anti-electromagnetic interference composites with multi-scale microstructure were obtained, in which Mg-9Li alloy serves as the reflecting layer and NZCF particles serve as the absorbing layer. The microstructure, electrical conductivity , magnetic property , and electromagnetic interference (EMI) shielding property of the composites were investigated. The results show that, with the increase of NZCF content, the electrical conductivity of the composites decreases, the magnetic property increases, and its shielding capability increases. The electrical conductivity and magnetic property of the composites can be regulated and controlled by adding nano-scale Ni-Zn-Co ferrites, which provides an efficient strategy for producing metal matrix composites with high EMI property.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Peijiang Liu,Zhengjun Yao,Jintang Zhou
Reduced graphene oxide/Ni 0.4 Zn 0.4 Co 0.2 Fe 2 O 3 (rGO/NZCF) nanocomposites were synthesized via facile hydrothermal reactions of rGO and metal nitrate. Transmission electron microscopy and scanning electron microscopy revealed that uniform NZCF particles with diameters of approximately 26.6 nm were homogeneously distributed on the rGO nanosheets . The electromagnetic properties and microwave absorption properties were determined of nanocomposites prepared with different rGO-to-NZCF weight ratios ( m rGO : m NZCF ). When the value of m rGO : m NZCF is 1:10, the rGO/NZCF nanocomposite with a thickness of 3 mm achieved a maximum reflection loss of −57.6 dB at 10.1 GHz and an effective adsorption frequency bandwidth of 4.2 GHz between 8.2 GHz and 12.4 GHz, which almost covers the whole X band. Therefore, the obtained composites are potential candidates for applications in microwave absorption.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）