High thermal conductivity epoxy composites with bimodal distribution of aluminum nitride and boron nitride fillers

Hong, Jeong Hee; Yoon, Subin; Hwang, Taehyun; Oh, Joon-Suk; Hong, Seung-Chul; Lee, Youngkwan; Nam, Jae‐Do

doi:10.1016/j.tca.2012.03.002

Cited by 187 publications

(111 citation statements)

References 15 publications

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“…It is observed that heat conductivity first increases linearly with the degree of agglomeration, reaches a maximum at the percolation threshold and finally decreases. The raising of conductivity with size (at nanoscale) was confirmed by many authors [46][47][48][49][50][51] in the case of epoxy resin with various fillers and by Prasher et al [31,52] in the case of nanofluids.…”

Section: Final Validation Of Dependence Of the Effective Thermal Condmentioning

confidence: 70%

Effect of volume-fraction dependent agglomeration of nanoparticles on the thermal conductivity of nanocomposites: Applications to epoxy resins, filled by SiO2, AlN and MgO nanoparticles

Machrafi

Lebon

Iorio

2016

Composites Science and Technology

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Abstract.A thermodynamic model for transient heat conduction in ceramic-polymer nanocomposites is proposed. The model takes into account particle's size, particle's volume fraction, and interface characteristics with emphasis on the effect of agglomeration of particles on the effective thermal conductivity of the nanocomposite.The originality of the present work is its basement on extended irreversible thermodynamics, combining nano-and continuum-scales without invoking molecular dynamics. The model is compared to experimental data using the examples of SiO2, AlN and MgO nanoparticles embedded in epoxy resin. The analysis is limited to spherical nanoparticles. The dependence of the degree of agglomeration with respect of the volume fraction of particles is also discussed and a power-law relation is established through a kinetic mechanism and experiments performed in our laboratory. This relation is used in 2 our theoretical model, resulting into a good agreement with experiments. It is shown that the effective thermal conductivity may either increase or decrease with the degree of agglomeration.

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Section: Final Validation Of Dependence Of the Effective Thermal Condmentioning

confidence: 70%

Effect of volume-fraction dependent agglomeration of nanoparticles on the thermal conductivity of nanocomposites: Applications to epoxy resins, filled by SiO2, AlN and MgO nanoparticles

Machrafi

Lebon

Iorio

2016

Composites Science and Technology

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“…And vertically aligned AlN could effectively enhance λ value of the AlN/epoxy composite from 0.915 to 1.754 W/mK with 20 vol% AlN fillers. Hong et al [171] adopted hybrid fillers of AlN and BN to increase the thermal conductivities of the epoxy resins. The optimal thermal conductive path was strongly affected by the packing efficiency and interfacial resistance of the AlN and BN fillers, and the maximum λ value of the composites was enhanced to 8.0 W/mK.…”

Section: Alnmentioning

confidence: 99%

A review on thermally conductive polymeric composites: classification, measurement, model and equations, mechanism and fabrication methods

Yang

Liang

et al. 2018

Adv Compos Hybrid Mater

302

124

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With the fast-developing miniaturization and integration of microelectronics packaging materials, ultrahigh-voltage electrical devices, light-emitting diodes (LEDs), and in areas which require good heat dissipation and low thermal expansion, the investigations on the polymeric composites with highly thermal conductivities and excellent thermal stabilities are urgently required, which would be beneficial to transferring the heat to the outside of the products, finally to effectively avoid substantial overheating and prolong their working life. Our article reviews recent progress in the classification, measurement methods, model and equations, mechanisms, commonly used thermally conductive fillers, and the correlative fabrication methods for the thermally conductive polymeric composites, aiming to understand and grasp how to enhance the λ value effectively. And future perspectives, focusing scientific problems and technical difficulties of the present thermally conductive polymeric composites are also described and evaluated.

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“…Ceramic fillers, such as boron nitride, aluminum oxide, aluminum nitride, silica, talc and many others can be used in such cases [1,2,4].…”

Section: Introductionmentioning

confidence: 99%

“…In some instruments, such as LED lamps or integrated memory chips, fast and efficient heat dissipation is a key issue, because the generated heat can raise the temperature of the device over its thermal stability limit. Over the critical temperature lifespan decreases significantly or the instrument may be damaged [4].…”

Section: Introductionmentioning

confidence: 99%

Injection molding of ceramic filled polypropylene: The effect of thermal conductivity and cooling rate on crystallinity

2013

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Three different nano-and micro-sized ceramic powders (boron-nitride (BN), talc and titanium-dioxide (TiO2)) in 30 vol% have been compounded with a polypropylene (PP) matrix. Scanning electron microscopy (SEM) shows that the particles are dispersed smoothly in the matrix and larger aggregates can not be discovered. The cooling gradients and the cooling rate in the injection-molded samples were estimated with numerical simulations and finite element analysis software. It was proved with differential scanning calorimetry (DSC) measurements that the cooling rate has significant influence on the crystallinity of the compounds. At a low cooling rate BN works as a nucleating agent so the crystallinity of the compound is higher than that of unfilled PP. On the other hand, at a high cooling rate, the crystallinity of the compound is lower than that of unfilled PP because of its higher thermal conductivity. The higher the thermal conductivity is, the higher the real cooling rate in the material, which influences the crystallization kinetics significantly.

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High thermal conductivity epoxy composites with bimodal distribution of aluminum nitride and boron nitride fillers

Cited by 187 publications

References 15 publications

Effect of volume-fraction dependent agglomeration of nanoparticles on the thermal conductivity of nanocomposites: Applications to epoxy resins, filled by SiO2, AlN and MgO nanoparticles

Effect of volume-fraction dependent agglomeration of nanoparticles on the thermal conductivity of nanocomposites: Applications to epoxy resins, filled by SiO2, AlN and MgO nanoparticles

A review on thermally conductive polymeric composites: classification, measurement, model and equations, mechanism and fabrication methods

Injection molding of ceramic filled polypropylene: The effect of thermal conductivity and cooling rate on crystallinity

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