Magnetic and structural anisotropic properties of magnetostrictive Fe-Ga flake particles and their epoxy-bonded composites

Na, Suok-Min; Park, Jungjin; Lee, Seunghun; Jeong, Se–Young; Flatau, Alison B.

doi:10.1016/j.matlet.2017.11.052

Cited by 20 publications

(12 citation statements)

References 8 publications

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“…For example, through the corresponding structural design, anisotropic LM-polymer composites were prepared. [131][132][133] The LM composites can be thermally driven by mixing polymers with alcohol and LM. 134 Based on the supercooling properties of LM, low-temperature self-powered wearable thermoelectric devices 135 and mechanically triggered stiffness tunable LM composites 136 were manufactured.…”

Section: Reviewmentioning

confidence: 99%

Liquid Metal Composites

Chen

Wang

Zhao

et al. 2020

Matter

360

238

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Liquid metal (LM) with high electrical conductivity, thermal conductivity, excellent biocompatibility, and extraordinary fluidity has emerged as a promising class of functional materials. However, such materials still encounter many practical challenges due to the rather limited forms available so far. As a promising remedy, LM composites in synergy with other materials would open tremendous opportunities for fundamental research or practical applications. This is because controllable integration of base LM with functional materials (e.g., metal nanoparticles, polymers, and drug molecules) would significantly tune the intrinsic properties of LM as desired, enabling it to offer further major potential in tackling various sectors' challenging issues, including thermal management, biomedicine, chemical catalysis, flexible electronics, and soft robots. Here, we systematically summarize and review the fundamental progress in pursuing LM composites. The basic composite strategies are outlined in three categories: LM composites with core-shell structure, LM-polymer composites, and LM-particle composites. The effectiveness of the composite strategy is illustrated via the typical applications of LM composites in representative fields. The challenges and perspectives in developing LM composites are also identified and interpreted to better guide future research. It is expected that the coming LM era will witness a new world of fruitful composites thereby discovered or invented.

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Section: Reviewmentioning

confidence: 99%

Liquid Metal Composites

Chen

Wang

Zhao

et al. 2020

Matter

360

238

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“…As suggested in the SEM and TEM images, with the increase of the reaction time, the Ni particles change from a one-dimensional (1D) hairlike structure to an irregular particlelike shape. From the magnetic point of view, compared with isotropic particles, 1D structures (e.g., rods or needles) possess much larger shape anisotropy, leading to higher H c values …”

Section: Resultsmentioning

confidence: 99%

“…From the magnetic point of view, compared with isotropic particles, 1D structures (e.g., rods or needles) possess much larger shape anisotropy, leading to higher H c values. 33 Figure 6a,b depicts the complex permittivity and complex permeability of the paraffin composites (50 wt %) of annealed Ni-MOF samples in the frequency range 2−18 GHz. In general, the real parts (ε′ and μ′) represent the storage capacity of electromagnetic energy, while the imaginary parts (ε″ and μ″) represent the loss ability of electromagnetic energy.…”

Section: Acs Applied Nano Materialsmentioning

confidence: 99%

Surface Architecture of Ni-Based Metal Organic Framework Hollow Spheres for Adjustable Microwave Absorption

Yang

Zhang

et al. 2019

ACS Appl. Nano Mater.

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Ni-based metal organic framework (MOF) hollow spheres were successfully synthesized by a hydrothermal method. After carbonization in nitrogen at 600 °C, a surface layer made of different Ni architectures is formed. The shape and size of the surface architectures (e.g., needles or pillars) can be adjusted effectively by controlling the duration of the hydrothermal reaction, leading to variable anisotropy and electromagnetic properties. The investigation of the microwave attenuation performance reveals that the paraffin wax composite (50 wt %) of Ni-MOF with 8 and 10 h reaction time could exhibit multiple resonance behaviors in permeability curves due to a different anisotropy of the magnetic Ni architectures on the surface compared to that in the shell of the hollow Ni-MOF spheres. Such multiresonance behavior could also benefit the bandwidth of the Ni-MOF hollow sphere absorber. It is found that the 8 and 10 h samples could reach a broad effective absorption bandwidth (EAB, reflection loss < −10 dB) of about 6.8 and 6.2 GHz with a thickness of around 1.8 and 4.6 mm, respectively. It is believed that this study not only offers a promising type of lightweight and broadband Ni-MOFs absorbers but also demonstrates a feasible approach for broadening the bandwidth of absorbers through making surface structures with different anisotropies.

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“…22,37 Analytical and numerical studies suggest that particles of high aspect ratio may offer improved magnetostriction 33,38 and ME coupling 39,40 in magnetostrictive polymer composites. Experimental observations demonstrate improved magnetostriction [41][42][43][44] and ME coupling [35][36][37]45 in these high aspect ratio systems. However, there is a lack of experimental evidence on the influence of particle aspect ratio on their magnetostriction performance and the ME coupling efficiency in polymer composites, especially for the case when low volume fractions are required to minimise leakage currents and improve electrical poling efficiency of the piezoelectric matrix in polymer based-ME composites.…”

Section: Introductionmentioning

confidence: 86%