Electric-arc synthesis of soot with high content of higher fullerenes in parallel arc

2016 ◽  
Vol 61 (12) ◽  
pp. 1856-1860 ◽  
Author(s):  
A. E. Dutlov ◽  
V. M. Nekrasov ◽  
A. G. Sergeev ◽  
V. P. Bubnov ◽  
I. E. Kareev
Keyword(s):  
Electric Arc ◽  
Higher Fullerenes

scholarly journals Роль карбида кремния в электродуговом синтезе высших фуллеренов

2020 ◽  
Vol 90 (1) ◽  
pp. 110
Author(s):  
И.Е. Кареев ◽  
А.Е. Дутлов ◽  
В.П. Бубнов
Keyword(s):  
Silicon Carbide ◽  
Total Yield ◽  
Electric Arc ◽  
Graphite Electrodes ◽  
Higher Fullerenes ◽  
Formation Efficiency

The influence of silicon atoms in the graphite electric arc zone on the formation efficiency of higher fullerenes C76, C78, C80, C82, C84, C86, etc. was studied. Additives of silicon carbide from 0 to 6.3 wt. % of composite graphite electrodes and optimization of the conditions of their evaporation make it possible to obtain soot with a content of higher fullerenes up to 15.5 wt.% in the extract and at the same time with a high total yield of fullerenes 10.5 wt.%.

Electric-arc synthesis of soot with a high content of higher fullerenes

2015 ◽  
Vol 60 (1) ◽  
pp. 102-106 ◽  
Author(s):  
I. E. Kareev ◽  
V. M. Nekrasov ◽  
V. P. Bubnov
Keyword(s):  
Electric Arc ◽  
Higher Fullerenes

Analytical Electron Microscopy Characterization of Electric Arc Furnace Dust

1981 ◽  
Vol 39 ◽  
pp. 134-135
Author(s):  
J. R. Porter ◽  
J. I. Goldstein ◽  
D. B. Williams
Keyword(s):  
Electron Microscopy ◽  
Analytical Electron Microscopy ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Dust Particles ◽  
Particle Analysis ◽  
Arc Furnace ◽  
Analytical Electron ◽  
Residual Elements ◽  
Industry Practice

Alloy scrap metal is increasingly being used in electric arc furnace (EAF) steelmaking and the alloying elements are also found in the resulting dust. A comprehensive characterization program of EAF dust has been undertaken in collaboration with the steel industry and AISI. Samples have been collected from the furnaces of 28 steel companies representing the broad spectrum of industry practice. The program aims to develop an understanding of the mechanisms of formation so that procedures to recover residual elements or recycle the dust can be established. The multi-phase, multi-component dust particles are amenable to individual particle analysis using modern analytical electron microscopy (AEM) methods.Particles are ultrasonically dispersed and subsequently supported on carbon coated formvar films on berylium grids for microscopy. The specimens require careful treatment to prevent agglomeration during preparation which occurs as a result of the combined effects of the fine particle size and particle magnetism. A number of approaches to inhibit agglomeration are currently being evaluated including dispersal in easily sublimable organic solids and size fractioning by centrifugation.

Monitoring the environmental and energy impacts of electric arc furnace steelmaking

2016 ◽  
Vol 104 (1) ◽  
pp. 102 ◽  
Author(s):  
Valentina Colla ◽  
Filippo Cirilli ◽  
Bernd Kleimt ◽  
Inigo Unamuno ◽  
Silvia Tosato ◽  
...  
Keyword(s):  
Electric Arc Furnace ◽  
Electric Arc ◽  
Arc Furnace

Technical textiles for protection against Arc-flash fire: Savesplash®

2020 ◽  
pp. 67-78
Author(s):  
Nandan Kumar ◽  
Sainath Shrikant Pawaskar
Keyword(s):  
Attenuation Factor ◽  
Threshold Energy ◽  
Single Layer ◽  
Weather Conditions ◽  
Electric Arc ◽  
Risk Category ◽  
Technical Textiles ◽  
Flash Fire ◽  
Level 3 ◽  
Arc Flash

Flash fire caused by electric arc is different than that caused by flammable liquids/fumes or combustible dusts. A suitable protective clothing for protection against electric arc-flash must be designed as per Indian weather conditions. Currently available garments are manufactured using two or three layers of woven/nonwoven combinations to achieve higher Hazard Risk Category (HRC) rating (level 3 and above). However, they are heavy and not comfortable to the end users. Savesplash® is a single layer inherent flame-retardant knitted fabric. Its arc rating was determined using ASTM standards. It achieved arc thermal performance value (ATPV) of 41 cal/cm2, breakopen threshold energy (E_BT) of 42 cal/cm2 and heat attenuation factor (HAF) of 94% when tested as per ASTM F1959/F1959M-14 which translated into an arc rating of 41 cal/cm2. This is equivalent to HRC level 4 ratings as per National Fire Protection Association’s NFPA 70E standard (USA). Further, cut and sewn gloves (HM-100) developed using Savesplash® fabric reinforced with leather on palm area achieved ATPV of 63 cal/cm2 and HAF of 94.5% when tested as per ASTM F2675/F2675M-13.

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