Fabrication of Al2O3 nanofluid by a plasma arc nanoparticles synthesis system

Chang, Ho; Chang, Yuchun

doi:10.1016/j.jmatprotec.2007.12.070

Cited by 58 publications

(20 citation statements)

References 18 publications

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“…Until now, a large variety of methods such as the thermal decomposition of aluminium sulfate 17 sol-gel synthesis, 18 plasma spray decomposition of oxides, 19 arc-discharge methods, 20 precipitation, 21 polyhydroxoaluminumpolyvinylalcohol, 22 laser ablation of an aluminium target in an oxygen atmosphere, 23 non-ionic surfactant, 24 metal organic chemical vapour deposition with Al(CH 3 ) 3 , 25 electron beam evaporation and spray pyrolysis method, 26 hydrolysis of alumina alkoxide, 27 have been employed to prepare γ-Al 2 O 3 . Furthermore, the γ-Al 2 O 3 was prepared by dehydration of γ-AlOOH in the temperature range of 450-750 °C, 28 and the morphology of γ-AlOOH stays the same.…”

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confidence: 99%

Synthesis and Characterisation of γ-Al₂O₃ with Porous Structure and Nanorod Morphology

Abdollahifar

2014

Journal of Chemical Research

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Mesoporous γ-Al 2 O 3 nanorods can be successfully synthesised using calcination of as-synthesised boehmite at 500 °C. The use of NaOH and KOH as pH adjusting agents in hydrothermal route on the synthesised samples are investigated in detail. X-ray powder diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis, N 2 adsorption/desorption, field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) are used to characterise the products. The TEM and FESEM micrographs show that the products were nanorod. According to our experimental results, the as-prepared γ-AlOOH and γ-Al 2 O 3 possesses ordered mesoporosity and narrow pore-size distribution. The γ-Al 2 O 3 prepared using KOH as pH adjusting regent show higher surface area compared with other samples prepared by NaOH.

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confidence: 99%

Synthesis and Characterisation of γ-Al₂O₃ with Porous Structure and Nanorod Morphology

Abdollahifar

2014

Journal of Chemical Research

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“…Increasing the heat transfer depends on the shape and the size of the particles and their volume fraction. Decreasing the size of the nanoparticles causes the conducting heat transfer coefficient to increase [9][10][11][12][13]. Maïga et al [14] and Chandrasekar et al [15] also investigated the effect of the host liquid on the heat transfer by comparing water-Al 2 O 3 and the Glycol-Al 2 O 3 nanofluids.…”

Section: Modelling and Simulation In Engineeringmentioning

confidence: 99%

Study of Swarm Behavior in Modeling and Simulation of Cluster Formation in Nanofluids

Pirani

Tabrizi

Farshad

2013

Modelling and Simulation in Engineering

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Modeling the multiagents cooperative systems inspired from biological self-organized systems in the context of swarm model has been under great considerations especially in the field of the cooperation of multi robots. These models are trying to optimize the behavior of artificial multiagent systems by introducing a consensus, which is a mathematical model between the agents as an intelligence property for each member of the swarm set. The application of this novel approach in the modeling of nonintelligent multi agents systems in the field of cohesion and cluster formation of nanoparticles in nanofluids has been investigated in this study. This goal can be obtained by applying the basic swarm model for agents that are more mechanistic by considering their physical properties such as their mass, diameter, as well as the physical properties of the flow. Clustering in nanofluids is one of the major issues in the study of its effects on heat transfer. Study of the cluster formation dynamics in nanofluids using the swarm model can be useful in controlling the size and formation time of the clusters as well as designing appropriate microchannels, which the nanoparticles are plunged into.

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“…One-step synthesis methods involve directly fabricating nanoparticles in the base liquid to form the nanofluid. Onestep synthesis is generally performed using the sputtering method [28][29][30], arc discharge method [6,[31][32][33], laser ablation method [34][35][36], water-assisted synthesis method [37,38], and chemical reaction-generated method [39][40][41][42]. Generally, one-step synthesis has self-screening mechanisms for particle size, in which excessively large particles automatically settle on the bottom of the container, whereas ultra-fine particles are suspended in the liquid.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Carbon Nanofluids by Using a Revised Water‐Assisted Synthesis Method

Teng

2013

Journal of Nanomaterials

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A revised water-assisted synthesis system (RWAS) was used to fabricate carbon/water nanofluids (CWNFs). The CWNFs were manufactured by heating graphite rods at different temperatures (700, 800, 900, and 1000°C). Aspects of the CWNFs and suspended nanocarbon, such as the morphology, structure, optical characteristics, and production rate, were fully characterized. Furthermore, the suspension performance of the CWNFs was controlled by adding a dispersant (water-soluble chitosan) at different concentrations. Finally, the CWNFs were determined to assess the influence of both the heating temperature of the graphite rod module (process temperature) and the dispersant concentration on the fundamental characteristics of the CWNFs. The results showed that the nanocarbon was a mixture of nanocrystalline graphite and amorphous carbon. Heating the graphite rod module at higher process temperatures resulted in a higher production rate and a greater nanocarbon particle size. Furthermore, adding dispersant could improve the suspension performance; increase the viscosity, density, and specific heat; and reduce the thermal conductivity of the CWNFs. The optimal combination of the process temperature range and dispersant concentration was 800 to 900°C and 0.2 wt.%, respectively, based on the production rate, suspension performance, and other fundamental properties of the CWNFs.

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Fabrication of Al2O3 nanofluid by a plasma arc nanoparticles synthesis system

Cited by 58 publications

References 18 publications

Synthesis and Characterisation of γ-Al₂O₃ with Porous Structure and Nanorod Morphology

Synthesis and Characterisation of γ-Al₂O₃ with Porous Structure and Nanorod Morphology

Study of Swarm Behavior in Modeling and Simulation of Cluster Formation in Nanofluids

Preparation and Characterization of Carbon Nanofluids by Using a Revised Water‐Assisted Synthesis Method

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Fabrication of Al2O3 nanofluid by a plasma arc nanoparticles synthesis system

Cited by 58 publications

References 18 publications

Synthesis and Characterisation of γ-Al2O3 with Porous Structure and Nanorod Morphology

Synthesis and Characterisation of γ-Al2O3 with Porous Structure and Nanorod Morphology

Study of Swarm Behavior in Modeling and Simulation of Cluster Formation in Nanofluids

Preparation and Characterization of Carbon Nanofluids by Using a Revised Water‐Assisted Synthesis Method

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Product

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Synthesis and Characterisation of γ-Al₂O₃ with Porous Structure and Nanorod Morphology

Synthesis and Characterisation of γ-Al₂O₃ with Porous Structure and Nanorod Morphology