scholarly journals Enhanced thermal conductivity of nanofluid-based ethylene glycol containing Cu nanoparticles decorated on a Gr–MWCNT hybrid material

RSC Advances ◽  
2017 ◽  
Vol 7 (1) ◽  
pp. 318-326 ◽  
Author(s):  
Pham Van Trinh ◽  
Nguyen Ngoc Anh ◽  
Bui Hung Thang ◽  
Le Dinh Quang ◽  
Nguyen Tuan Hong ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Ethylene Glycol ◽  
Hybrid Material ◽  
Chemical Reduction ◽  
High Thermal Conductivity ◽  
Cu Nanoparticles ◽  
Cu Nanoparticle ◽  
Enhanced Thermal Conductivity

High thermal conductivity was obtained for nanofluid-based EG containing Cu nanoparticle-decorated Gr–MWCNT hybrid material synthesized by chemical reduction.

Preparation and characterization of surface modified boron nitride epoxy composites with enhanced thermal conductivity

RSC Advances ◽  
2014 ◽  
Vol 4 (83) ◽  
pp. 44282-44290 ◽  
Author(s):  
Jun Hou ◽  
Guohua Li ◽  
Na Yang ◽  
Lili Qin ◽  
Maryam E. Grami ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Thermal Stability ◽  
Boron Nitride ◽  
High Thermal Conductivity ◽  
Epoxy Composites ◽  
Surface Modified ◽  
Enhanced Thermal Conductivity ◽  
Electrical Insulation Properties

The fabricated surface modified boron nitride epoxy composites exhibit high thermal conductivity, superior thermal stability and good mechanical properties while retaining good electrical insulation properties.

scholarly journals Enhanced thermal conductivity of nanocomposites with MOF-derived encapsulated magnetic oriented carbon nanotube-grafted graphene polyhedra

RSC Advances ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 3357-3365 ◽  
Author(s):  
Xu Li ◽  
Ya Li ◽  
Md Mofasserul Alam ◽  
Peng Chen ◽  
Ru Xia ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotube ◽  
Metal Organic Framework ◽  
High Thermal Conductivity ◽  
Metal Organic ◽  
Magnetic Carbon ◽  
Enhanced Thermal Conductivity ◽  
Organic Framework

A high-thermal conductivity filler of magnetic carbon nanotube-grafted graphene polyhedra is exploited via annealing of a metal–organic framework (ZIF-67).

Performance Evaluation of a High Thermal Conductivity Fuel With Graphene Additives During the LBLOCA

2012 ◽  
Author(s):  
Seung Won Lee ◽  
Hyoung Tae Kim ◽  
In Cheol Bang
Keyword(s):  
Thermal Conductivity ◽  
Cross Section ◽  
Power Reactor ◽  
High Thermal Conductivity ◽  
Absorption Cross ◽  
Fuel Rod ◽  
Graphene Composite ◽  
Safety Margins ◽  
Composite Fuel ◽  
Enhanced Thermal Conductivity

The fuel rod performance of enhanced thermal conductivity UO2/graphene composites is investigated through a LBLOCA analysis. The benefits increased monotonically with increasing thermal conductivity in terms of reduced fuel center temperature and PCT. The performance of the UO2/graphene composite fuel is assessed in OPR-1000 (Optimized Power Reactor-1000) during a LBLOCA. Graphene can be a promising material for developing advanced nuclear fuel because of its property about the high thermal conductivity and low absorption cross section. The results confirm a LBLOCA performance related to PCT of the UO2/graphene composite fuel and its potential while maintaining large safety margins.

Pure Copper Solder Paste with Sub-200 °C Processing Temperature

2011 ◽  
Vol 2011 (1) ◽  
pp. 001033-001039
Author(s):  
Alfred A. Zinn ◽  
Frances Y. Chiu
Keyword(s):  
Thermal Conductivity ◽  
Chemical Reduction ◽  
Low Cost ◽  
Pure Copper ◽  
Advanced Technology ◽  
Melting Point Depression ◽  
Processing Temperature ◽  
Solder Paste ◽  
Cu Nanoparticles ◽  
Tap Density

At the Advanced Technology Center of Lockheed Martin Corporation, we have developed a copper-based electrical interconnect material that can be processed around 200 °C. The material can be dispensed using Gauge 20–30 syringe tips and has shown electrical and thermal conductivity that progresses toward the bulk copper values. The approach is enabled by our controlled fabrication process of Cu nanoparticles, which takes advantage of rapidly increasing melting point depression as the particle size approaches the nanoscale. The readily scalable synthesis of Cu nanoparticles uses a low cost solution-phase chemical reduction approach. XRD, SEM and HRTEM confirm the formation of stable Cu nanoparticles as small as 10 nm and below and the effectiveness of the surfactant mixture to prevent oxidation. We have demonstrated assembly of fully functional LED test boards and built for the first time a fully functional small camera board using all Cu nanoparticle based pastes with a consistency very similar to standard SAC solder paste and a tap density approaching 6 g/ccm. Initial tensile testing gave values around 50% of eutectic SnPb solder. Once fully optimized, the pure copper electrical interface material is expected to produce joints with up to 10x electrical and thermal conductivity compared to the tin-based materials currently in use.

Experimental study on the thermal conductivity of ethylene glycol-based nanofluid containing Gr-CNT hybrid material

2018 ◽  
Vol 269 ◽  
pp. 344-353 ◽  
Author(s):  
Pham Van Trinh ◽  
Nguyen Ngoc Anh ◽  
Nguyen Tuan Hong ◽  
Phan Ngoc Hong ◽  
Phan Ngoc Minh ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Experimental Study ◽  
Ethylene Glycol ◽  
Hybrid Material

Enhanced Thermal Conductivity of Ethylene Glycol-Based Suspensions in the Presence of Silver Nanoparticles of Various Sizes and Shapes

2013 ◽  
Author(s):  
Xin Fang ◽  
Qing Ding ◽  
Li-Wu Fan ◽  
Zi-Tao Yu ◽  
Xu Xu ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Ethylene Glycol ◽  
Ag Nanoparticles ◽  
Elevated Temperatures ◽  
Shape Effect ◽  
Shape Dependence ◽  
Aspect Ratios ◽  
Relative Enhancement ◽  
Microscopy Techniques ◽  
Enhanced Thermal Conductivity

Engineered suspensions in the presence of highly-conductive nanoparticles, coined as nanofluids, have been studied extensively as a novel family of advanced heat transfer fluids. Attention has been paid primarily to the enhanced thermal conductivity of the suspensions that depends significantly on the material, size, shape, dispersion and loading of the nanoparticles. In this paper, the effects of adding silver (Ag) nanoparticles of various sizes and shapes on the thermal conductivity of ethylene glycol (EG)-based suspensions were investigated experimentally. These included Ag nanospheres (Ag NSs), Ag nanowires (Ag NWs) and Ag nanoflakes (Ag NFs). The suspensions were prepared at concentrations of 1, 5 and 10 mg/mL. The size and shape of the various Ag nanoparticles were observed by means of microscopy techniques. The dispersion and stability of the suspensions were also inspected. Measurements of the thermal conductivity of the suspensions were performed on a Hot Disk Thermal Constants Analyzer, which is based on the transient plane source technique, at elevated temperatures from 10 to 30 °C at an increment of 5 °C. It was shown that the thermal conductivity of the EG-based suspensions increases with raising the temperature. The Ag NWs of a very high aspect ratio (∼400) caused greatest relative enhancement up to 15.6% at the highest loading of 10 mg/mL (∼0.1 vol.%). The other two types of nanoparticles, Ag NSs and Ag NFs with much smaller aspect ratios, only led to enhancements up to 5%. The formation of a network of Ag NWs that facilitates heat conduction was likely responsible for their better performance. In addition, the relative enhancement was predicted by the Hamilton-Crosser (H-C) equation that takes the shape effect of the particles into consideration. It was shown that the predictions far underestimate the thermal conductivity enhancements but are qualitatively consistent with their shape dependence.

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