Microwave Assisted Large Scale Sintering of Multilayer Electroceramic Devices

Microwave reactors equipped with microwave absorbent as high-temperature bed are effective for the pyrolysis reactions. The uniformity and stability of temperature distribution on the microwave absorbent bed surface is important to the microwave pyrolysis reactor especially in the large-scale reactor. Herein, the temperature distribution on the SiC microwave absorbent bed in a large-scale microwave pyrolysis reactor without feeding was examined by both infrared thermography and simulation. Considering the economics of using multiple low-power magnetrons in large-scale reactor, the effect of the working magnetrons location on the heating rate of bed surface and the COV of temperature distribution was investigated. The results showed that more uniform and stable temperature distribution of bed surface in the large-scale reactor was obtained when the magnetrons located at the bottom of the reactor were in use. This study provides guidance for the scale-up of microwave-assisted pyrolysis reactor with multiple low-power magnetrons.

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Industrializable synthesis of narrow-dispersed carbon dots achieved by microwave-assisted selective carbonization of surfactants and their applications as fluorescent nano-additives

Journal of Materials Chemistry A ◽

10.1039/d0ta07252d ◽

2020 ◽

Vol 8 (40) ◽

pp. 21317-21326

Author(s):

Laiping Fang ◽

Minjian Wu ◽

Chushu Huang ◽

Zhaoyang Liu ◽

Jinlun Liang ◽

...

Keyword(s):

Carbon Dots ◽

Large Scale ◽

Economic Strategy ◽

Microwave Assisted ◽

Nano Additives ◽

Large Scale Synthesis

The robust and economic strategy for the large-scale synthesis of narrow-dispersed hydrophobic C-dots and their successful application as fluorescent nano-additives indicate that C-dots are ready to go from lab to industry.

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Microwave Assisted Synthesis of Ru3Pd6Pt Cathode Catalyst in a PEM Fuel Cell

Journal of New Materials for Electrochemical Systems ◽

10.14447/jnmes.v16i3.3 ◽

2013 ◽

Vol 16 (3) ◽

pp. 147-150 ◽

Cited By ~ 1

Author(s):

F. Leyva-Noyola ◽

O. Solorza-Feria

Keyword(s):

Fuel Cell ◽

Large Scale ◽

High Pressures ◽

Cost Effective ◽

Pem Fuel Cell ◽

Reduction Reaction ◽

Microwave Assisted Synthesis ◽

Microwave Assisted ◽

Long Time ◽

Set Up

Nanoparticles of Ru3Pd6Pt have been previously produced by different synthesis routes that involve high temperatures and relative high pressures and long time. The usage of a conventional microwave assisted synthesis reduces environmental risk impact as well as the cost effective production in large scale with minimum set up modifications. These features are the motivations for the use of microwaves in the synthesis of the Ru3Pd6Pt catalyst for PEM fuel cell applications to reduce the Pt loading. In this communication a tri-metallic electrocatalyst was produced by the reduction of the corresponding metallic salts, RuCl3, PdCl2, and H2PtCl6 in ethylene glycol using a modified conventional microwave device. Oxygen reduction reaction kinetic analysis results conducted to a Tafel slope, (-b = 41.2 ± 1.7 mV dec-1) at low overpotential, and exchange current density (i0 = 3.01 ± 0.39 × 10-5 mA cm-2) in 0.5M H2SO4. This electrocatalyst exhibited good performance and stability in a single H2/O2PEM fuel cell.

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Large scale synthesis of ultrathin cupric oxide nanosheets via a rapid microwave-assisted and template-free route

Materials Letters ◽

10.1016/j.matlet.2017.11.128 ◽

2018 ◽

Vol 214 ◽

pp. 138-141

Author(s):

Xingrong Han ◽

Fan Liao ◽

Yanfei Zhang ◽

Chunju Xu ◽

Huiyu Chen

Keyword(s):

Large Scale ◽

Cupric Oxide ◽

Microwave Assisted ◽

Template Free ◽

Large Scale Synthesis

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Microwave-Assisted Extraction of Phenolic Compounds from Dried Waste Grape Skins

International Journal of Food Engineering ◽

10.1515/ijfe-2015-0009 ◽

2015 ◽

Vol 11 (3) ◽

pp. 359-370 ◽

Cited By ~ 27

Author(s):

Miguel A. Pedroza ◽

Danila Amendola ◽

Luana Maggi ◽

Amaya Zalacain ◽

Dante M. De Faveri ◽

...

Keyword(s):

Phenolic Compounds ◽

Large Scale ◽

Extraction Time ◽

Process Efficiency ◽

Total Phenolic ◽

Energetic Efficiency ◽

Microwave Assisted Extraction ◽

Microwave Assisted ◽

Assisted Extraction ◽

Grape Skins

Abstract Microwave-assisted extraction (MAE) was investigated for recovering of total phenolic compounds from dried waste grape skins using a domestic microwave oven. Influence of vessel geometry, irradiation cycles, irradiation power and time was investigated. The results in terms of phenolics yield, antioxidant capacity and energy consumption were compared with a reference solid–liquid extraction (SLE) carried out for 2 h at 60°C. Equivalent yield of total phenolics as in SLE was achieved with a MAE extraction time of 1,033 sec (corresponding to 83 sec of irradiation at 900 W, 83% saving in extraction time compared to SLE and with a 70% energetic efficiency). Pre-maceration of samples and solvent pre-heating are proposed for large-scale industrial processes to enhance phenolics extraction and process efficiency.

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Microwave-Assisted Chemistry: a Closer Look at Heating Efficiency

Australian Journal of Chemistry ◽

10.1071/ch08503 ◽

2009 ◽

Vol 62 (3) ◽

pp. 236 ◽

Cited By ~ 57

Author(s):

Richard Hoogenboom ◽

Tom F. A. Wilms ◽

Tina Erdmenger ◽

Ulrich S. Schubert

Keyword(s):

Microwave Heating ◽

Microwave Power ◽

Large Scale ◽

Small Scale ◽

Passive Heating ◽

Conductive Heating ◽

Heating Efficiency ◽

Medium Scale ◽

Microwave Assisted ◽

Demineralized Water

Nowadays, microwave heating has evolved into a common tool for chemists based on its numerous advantages over conventional conductive heating. Surprisingly, the efficiency of microwave-assisted heating is still rather unexplored. In this contribution, we report our investigations concerning the heating efficiency of a variety of solvents including polar and apolar substances. Moreover, the effects of adding salt or passive heating elements on the microwave heating efficiency will be addressed. Finally, the heating efficiency of demineralized water is discussed at different volumes and with different microwave power levels in both monomode and multimode microwave synthesizers, demonstrating maximum average heating efficiencies of 10% for small-scale vessels (5 mL), 20% for medium-scale (50 mL), and 30% for large-scale microwave heating (400 mL).

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Microwave-assisted heating synthesis: a general and rapid strategy for large-scale production of highly crystalline g-C3N4 with enhanced photocatalytic H2 production

Green Chemistry ◽

10.1039/c4gc01517g ◽

2014 ◽

Vol 16 (11) ◽

pp. 4663-4668 ◽

Cited By ~ 110

Author(s):

Yu-Peng Yuan ◽

Li-Sha Yin ◽

Shao-Wen Cao ◽

Li-Na Gu ◽

Geng-Sheng Xu ◽

...

Keyword(s):

Large Scale ◽

H2 Production ◽

Scale Production ◽

Microwave Assisted ◽

Large Scale Production

g-C3N4 can be fabricated in minutes for enhanced photocatalytic H2 production through a microwave-assisted heating urea process.

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Microwave-assisted large scale synthesis of lanthanide metal–organic frameworks (Ln-MOFs), having a preferred conformation and photoluminescence properties

Dalton Transactions ◽

10.1039/c5dt01598g ◽

2015 ◽

Vol 44 (26) ◽

pp. 11954-11962 ◽

Cited By ~ 38

Author(s):

Partha Pratim Bag ◽

Xu-Sheng Wang ◽

Rong Cao

Keyword(s):

High Purity ◽

Large Scale ◽

Metal Organic Frameworks ◽

Microwave Assisted Synthesis ◽

Green Solvents ◽

Photoluminescence Properties ◽

Stable Conformation ◽

Microwave Assisted ◽

Metal Organic ◽

Lanthanide Metal

We have prepared 2 g Ln-MOF on a laboratory scale with high purity using microwave-assisted synthesis by changing the conformation of flexible ligand using Ln, which adopts only the preferred (energetically stable) conformation from green solvents (water and ethanol).

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Repeated microwave-assisted exfoliation of expandable graphite for the preparation of large scale and high quality multi-layer graphene

RSC Advances ◽

10.1039/c3ra22673e ◽

2013 ◽

Vol 3 (29) ◽

pp. 11601 ◽

Cited By ~ 28

Author(s):

Xiaoxu Liu ◽

Jilei Liu ◽

Da Zhan ◽

Jiaxu Yan ◽

Jin Wang ◽

...

Keyword(s):

Large Scale ◽

Expandable Graphite ◽

High Quality ◽

Microwave Assisted ◽

Layer Graphene

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Micro-PIXE and Micro-RBS Characterization of Micropores in Porous Silicon Prepared Using Microwave-Assisted Hydrofluoric Acid Etching

Microscopy and Microanalysis ◽

10.1017/s1431927612014262 ◽

2013 ◽

Vol 19 (2) ◽

pp. 261-267 ◽

Cited By ~ 4

Author(s):

Muthanna Ahmad ◽

Geoffrey W. Grime

Keyword(s):

Porous Silicon ◽

Hydrofluoric Acid ◽

Large Scale ◽

Porous Structures ◽

Microwave Assisted ◽

Imaging Results ◽

Concentric Circles ◽

First Time ◽

Cu Ions

AbstractPorous silicon (PS) has been prepared using a microwave-assisted hydrofluoric acid (HF) etching method from a silicon wafer pre-implanted with 5 MeV Cu ions. The use of microbeam proton-induced X-ray emission (micro-PIXE) and microbeam Rutherford backscattering techniques reveals for the first time the capability of these techniques for studying the formation of micropores. The porous structures observed from micro-PIXE imaging results are compared to scanning electron microscope images. It was observed that the implanted copper accumulates in the same location as the pores and that at high implanted dose the pores form large-scale patterns of lines and concentric circles. This is the first work demonstrating the use of microwave-assisted HF etching in the formation of PS.

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