Synthesis of Fine Vanadium-Carbide (VC0.88) Powder Using Carbon Nanofiber Full article
| Journal |
Steel in Translation
ISSN: 0967-0912 , E-ISSN: 1935-0988 |
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| Output data | Year: 2018, Volume: 48, Number: 4, Pages: 207-213 Pages count : 7 DOI: 10.3103/s096709121804006x | ||||||
| Tags | fine powder, synthesis, vanadium carbide, carbon nanofiber, furnace reduction, carbon reducing agents | ||||||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | The Ministry of Education and Science of the Russian Federation | 10.1151.2014/K |
Abstract:
The synthesis of fine vanadium-carbide (VC0.88) powder is considered. To produce the vanadium
carbide, vanadium(III) oxide is reduced by means of carbon nanofiber in an induction furnace with an argon atmosphere. The carbon nanofiber is produced by the catalytic decomposition of light hydrocarbons. The specific surface of the carbon nanofiber is very high: ~150000 m2/kg, as against ~50000 m2/kg for soot. The impurity content in the carbon nanofiber is 1 wt %. By analysis of the phase diagram of the V–C system, the batch composition and the upper temperature limit in carbide formation may be determined such that vanadium carbide is formed as powder. Thermodynamic analysis yields the initial temperature at which the vanadium(III) oxide is reduced in a furnace with different CO pressures. The characteristics of the vanadium carbide are determined by the following methods: X-ray phase and elementary analysis; pycnometric analysis; scanning electron microscopy with local energy dispersion X-ray microanalysis (EDX); low-temperature nitrogen adsorption with subsequent determination of the specific surface by the BET method; sedimentation
analysis; and synchronous thermogravimetric analysis and differential scanning calorimetry (TG/DSC). The material obtained with optimal reduction parameters consists of a single phase: vanadium carbide VC0.88. The powder particles are predominantly clumped together in aggregates. The mean size of the particles and aggregates is 9.2–9.4 μm, with a broad size distribution. The specific surface of the samples is 1800–2400 m2/kg. Oxidation of vanadium carbide begins at about 430°C and is practically over at 830°C. Optimal synthesis requires stoichiometric proportions of the reagents in the production of vanadium carbide VC0.88 at 1500–1600°C, with 20-min holding. In this process, carbon nanofiber effectively produces the carbide as the reduction product. The vanadium(III) oxide is reduced practically completely to VC0.88.
Cite:
Krutskii Y.L.
, Tyurin A.G.
, Popov M.V.
, Maksimovskii E.A.
, Netskina O.V.
Synthesis of Fine Vanadium-Carbide (VC0.88) Powder Using Carbon Nanofiber
Steel in Translation. 2018. V.48. N4. P.207-213. DOI: 10.3103/s096709121804006x Scopus РИНЦ OpenAlex
Synthesis of Fine Vanadium-Carbide (VC0.88) Powder Using Carbon Nanofiber
Steel in Translation. 2018. V.48. N4. P.207-213. DOI: 10.3103/s096709121804006x Scopus РИНЦ OpenAlex
Original:
Крутский Ю.Л.
, Тюрин А.Г.
, Попов М.В.
, Максимовский Е.А.
, Нецкина О.В.
Синтез высокодисперсного карбида ванадия (VC0,88 ) с использованием нановолокнистого углерода
Известия высших учебных заведений. Черная металлургия. 2018.
Т.61. №4. С.260-267. DOI: 10.17073/0368-0797-2018-4-260-267RSCI
Scopus
РИНЦ
AN
OpenAlex
Синтез высокодисперсного карбида ванадия (VC0,88 ) с использованием нановолокнистого углерода
Известия высших учебных заведений. Черная металлургия. 2018.
Т.61. №4. С.260-267. DOI: 10.17073/0368-0797-2018-4-260-267RSCI
Scopus
РИНЦ
AN
OpenAlex
Dates:
| Submitted: | Jul 3, 2017 |
| Published print: | Apr 1, 2018 |
| Published online: | Jul 18, 2018 |
Identifiers:
| Scopus: | 2-s2.0-85050185804 |
| Elibrary: | 35782829 |
| OpenAlex: | W2884990566 |