Preparation of novel copper-powder-sintered frame/paraffin form-stable phase change materials with extremely high thermal conductivity

Li, Zongtao; Wu, Yuxuan; Zhuang, Baoshan; Zhao, Xuezhi; Ding, Xinrui; Chen, Kaihang

doi:10.1016/j.apenergy.2017.10.046

Cited by 58 publications

(10 citation statements)

References 42 publications

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“…For example, it has been demonstrated by many researchers that the structure is completely amorphous on the surface of the ribbon in contact with the copper disc, but a certain part of its outer surface crystallizes [24,29,31]. Reason for this is that the heat transfer on the surface of the copper disc is faster than in the air [33]. Rotational speed of the copper disc is one of important parameters affecting the cooling rate [34].…”

Section: Introductionmentioning

confidence: 99%

Effect of Fe-Ni Substitution in FeNiSiB Soft Magnetic Alloys Produced by Melt Spinning

Yılmaz

Akgül

Karataş

et al. 2021

Advances in Materials Science

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Alloys of FeNiSiB soft magnetic materials containing variable Fe and Ni contents (wt.%) have been produced by melt spinning method, a kind of rapid solidification technique. The magnetic and structural properties of FeNiSiB alloys with soft magnetic properties were investigated by increasing the Fe ratio. X-ray diffraction analysis and SEM images shows that the produced alloy ribbons generally have an amorphous structure, together with also partially nanocrystalline regions. It was observed that the structure became much more amorphous together with increasing Fe content in the composition. Among the alloy ribbons, the highest saturation magnetization was obtained as 0.6 emu/g in the specimen with 50 wt.% Fe. In addition, the highest Curie temperature was observed in the sample containing 46 wt.% Fe.

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Section: Introductionmentioning

confidence: 99%

Effect of Fe-Ni Substitution in FeNiSiB Soft Magnetic Alloys Produced by Melt Spinning

Yılmaz

Akgül

Karataş

et al. 2021

Advances in Materials Science

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“…Nowadays, with the urgent demand for new energy, the rapid collection and conversion of energy is extremely important. , Thermal energy collection using phase change materials (PCMs) can improve the efficiency of energy utilization and be applied in the energy storage and thermal management, − whereas the problems of slow heating rate, uneven temperature distribution, and low efficiency exist in rapid heating and thermal storage of PCMs. , One solution is to fill PCMs with high thermal conductivity materials. − For instance, Wu and co-workers have designed high-performance thermally conductive phase change composites (PCCs) by compression-induced construction of large aligned graphite sheets inside PCCs . This composite possesses a thermal conductivity in the range of 4.4–35.0 W m –1 K –1 at graphite loadings below 40.0 wt %, while a large amount of high thermal conductivity material is needed in this method and requires a complex design of the structures. , Another effective solution is to use microwaves to electromagnetically heat the PCMs. In comparison to a conventional heating system, microwave heating owns many advantages. , Microwave heating is rapid and energy-saving, and the microwave energy can be directly and uniformly converted into heat throughout the sample. , However, PCMs with a low dielectric loss tangent have a poor effect when electromagnetic heated.…”

Section: Introductionmentioning

confidence: 99%

“…11 This composite possesses a thermal conductivity in the range of 4.4− 35.0 W m −1 K −1 at graphite loadings below 40.0 wt %, while a large amount of high thermal conductivity material is needed in this method and requires a complex design of the structures. 12,13 Another effective solution is to use microwaves to electromagnetically heat the PCMs. In comparison to a conventional heating system, microwave heating owns many advantages.…”

Section: Introductionmentioning

confidence: 99%

Microwave-Heated Graphene Realizes Ultrafast Energy Conversion and Thermal Storage

Yang

Bai

et al. 2020

Energy Fuels

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Thermal energy storage using common phase change materials (PCMs) usually suffers from a long time consumption, uneven temperature, and low efficiency. An electromagnetic induction heating method with the advantages of rapidness and heating from the inside out might mitigate these issues. Two-dimensional graphene owns a single atomic layer structure and a large number of exposed chemical bonds; therefore, making fast electromagnetic wave absorption and thermal conduction becomes possible. Herein, we realized a fast, uniform, and repeatable thermal conversion through microwave heating graphene and paraffin composite. Graphene acts as a bridge for linking microwaves and paraffin. It absorbs microwaves as a result of the existence of microenergy levels and transmits energy to paraffin in the form of thermal energy. As a consequence, the composite can be rapidly heated to the phase transition temperature (58 °C) within 1 min and the thermal effect can be maintained after 30 cycles. The enthalpy of composite is 190.04 J g −1 , even with 1 wt % loading of graphene. Moreover, this method can be safely handled in the air because the composite has almost no mass loss below 159.9 °C. In summary, the proposed strategy of microwaveheated graphene−PCMs has great application potential in thermal management and energy conversion.

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“…There are two ways to improve the thermal conductivity. The first is to directly improve the thermal conductivity of the base material, for example, by preparing a novel copper‐powder‐sintered frame or an ultrathin‐graphite foam matrix . The second is to improve the thermal conductivity of the pure PCM, such as by the addition of highly dispersed carbon fibers, carbon nanotubes, graphite, or metal nanowires .…”

Section: Introductionmentioning

confidence: 99%

An Efficient Environmentally Friendly Composite Material Based on Carbonized Biological Cellulose/Paraffin: Thermal and Sustainable Properties Analysis

Zhang

Huang

et al. 2020

ChemistrySelect

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A shape-stabilized composite phase change material (SS-CPCM) with paraffin (PA) and biological porous carbon (BPC) was prepared. Freeze-dried biological-cellulose include abandoned pomelo peel (APP) and tangerine peel (ATP) were carbonized in vacuum at 800°C to obtain BPC to be used as a matrix material to prevent PA leakage and enhance thermal conductivity. A vacuum impregnation process was utilized to obtain the SS-CPCM. Scanning electron microscopy showed that BPC (carbonized APP is subsequently referred to as BPC1 and carbonized ATP as BPC2) has a porous, honeycomb-like structure, and that the paraffin encapsulated by the pores is evenly distributed. The SS-CPCM2 (made from ATP) had the highest thermal conductivity (2.10 W/m K), which is 1.89 and 10 times that of the SS-CPCM1 (made using APP) and pure PA, respectively. Differential scanning calorimetry and thermo-gravimetric analysis were applied to determine the thermal performance and thermal reliability of the SS-CPCM. Therefore, the prepared SS-CPCM has potential in the field of energy storage.

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Preparation of novel copper-powder-sintered frame/paraffin form-stable phase change materials with extremely high thermal conductivity

Cited by 58 publications

References 42 publications

Effect of Fe-Ni Substitution in FeNiSiB Soft Magnetic Alloys Produced by Melt Spinning

Effect of Fe-Ni Substitution in FeNiSiB Soft Magnetic Alloys Produced by Melt Spinning

Microwave-Heated Graphene Realizes Ultrafast Energy Conversion and Thermal Storage

An Efficient Environmentally Friendly Composite Material Based on Carbonized Biological Cellulose/Paraffin: Thermal and Sustainable Properties Analysis

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