نتایج جستجو برای: electrical arc discharge method

تعداد نتایج: 1910876  

Journal: :journal of the iranian chemical research 0
mahdi hajivaliei department of physics, bu-ali sina university, hamedan, iran majid lashkanpour department of physics, bu-ali sina university, hamedan, iran

a simple, inexpensive and one-step synthesis route of ag-tio2 nanoparticles by arc discharge method isreported. the resulting nanoparticles were characterized using x-ray diffraction and scanning electronmicroscopy. x-ray diffraction patterns demonstrate dominance of rutile to anatase phase in tio2 andformation of silver metal on tio2 after arc discharge process. scanning electron microscopy im...

Journal: :ACS nano 2009
Zhong-Shuai Wu Wencai Ren Libo Gao Jinping Zhao Zongping Chen Bilu Liu Daiming Tang Bing Yu Chuanbin Jiang Hui-Ming Cheng

We developed a hydrogen arc discharge exfoliation method for the synthesis of graphene sheets (GSs) with excellent electrical conductivity and good thermal stability from graphite oxide (GO), in combination with solution-phase dispersion and centrifugation techniques. It was found that efficient exfoliation and considerable deoxygenation of GO, and defect elimination and healing of exfoliated g...

2003

High voltage arc discharge is a method to pasteurize liquid foods by applying rapid discharge voltages through an electrode gap below the surface of aqueous suspensions of microorganisms. Inactivation of microorganisms and enzymes contained in food products by electrical discharges began in the 1920s with the electropure process for milk. This process consisted of passing an electrical current ...

Mahdi Hajivaliei, Majid Lashkanpour

A simple, inexpensive and one-step synthesis route of Ag-TiO2 nanoparticles by arc discharge method isreported. The resulting nanoparticles were characterized using X-ray diffraction and scanning electronmicroscopy. X-ray diffraction patterns demonstrate dominance of rutile to anatase phase in TiO2 andformation of silver metal on TiO2 after arc discharge process. Scanning electron microscopy im...

2005
Michael CHAPMAN

The arcing duration of a switching operation is a critical input parameter in condition-based switchgear monitoring algorithms. In this paper we propose a new non-intrusive method that directly measures the duration of the electrical arc discharge during current interruption in switchgear. The method relies on coupling of the VHF electric fields generated by the arc. The required hardware used ...

2009
Sven G. Bilén Brian E. Gilchrist

Advanced insulation materials are needed to support future electrodynamic tether missions as well as for other high voltage applications requiring direct exposure to vacuum/space plasma conditions, such as cabling to solar arrays. Some of the desired characteristics of these materials include the ability to resist damage from low-Earth-orbit environments (including atomic oxygen and micrometeor...

2014
Ryan D. Robinson Kirill Gutsol Alexander Rabinovich Alexander Fridman

Plasma acid is an acidic solution simply produced from water and a carrier gas in an electrical discharge. These produced solutions are of high value for biological decontamination and industrial pollutant abatement applications. While several electrical discharges have been shown to produce plasma acid, the subject of this study is the gliding arc plasmatron, a rotating gliding arc discharge. ...

Journal: :international journal of nanoscience and nanotechnology 2009
r. jabari seresht m. jahanshahi* j. raoof m. khorram

carbon nanotube, a new structure of carbon element, is composed of graphene sheets rolled into closed concentric cylinders with diameter of the order of nanometers and length of micrometers. liquid arc discharge was used for fabrication of carbon nanotubes, and subsequently a modified acid treatment method applied for purification stage. a statistical design of experimental (doe) (taguchi metho...

2006
Pierre Degond

Partially ionized plasmas corresponding to different ionization degrees are derived and connected one with each other by the diffusion approximation methodology. These plasmas are the following electrical discharges: a thermal arc discharge, glow discharges in local thermodynamic equilibrium -LTEand in non-LTE, and a non-LTE glow discharge interacting with an electron beam (or flow).

Journal: :Nanotechnology 2010
O Volotskova A Shashurin M Keidar Y Raitses V Demidov S Adams

The electrical resistance of mats of single-wall carbon nanotubes (SWNTs) is measured as a function of mat temperature under various helium pressures, in vacuum and in atmospheric air. The objective of this paper is to study the thermal stability of SWNTs produced in a helium arc discharge in the experimental conditions close to natural conditions of SWNT growth in an arc, using a furnace inste...

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