Plasma-chemical method for producing metal oxide powders and their application

Zhukov, Ilya; Vorozhtsov, S. A.; Promakhov, Vladimir; Bondarchuk, Ivan S.; Жуков, А. С.; Vorozhtsov, Alexander

doi:10.1088/1742-6596/652/1/012027

Cited by 5 publications

(4 citation statements)

References 3 publications

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“…This method is characterized by high accuracy and relative simplicity and it can be effectively realized using MS Excel software.Metal nanopowder is one of the most prospective high-energy materials that is widely used in many spheres [1,2]. This explains long and sustained interest in studying the features of metal nanopowder, in particular the kinetics of oxidation [3].…”

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confidence: 99%

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Identification of kinetic triplets by results of derivatographic analysis

Bondarchuk

Borisov

2018

MATEC Web Conf.

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Abstract.The method for identification of the triplet of kinetic parameters of a heterogeneous reaction using the data of the derivatographic analysis is proposed. This method is characterized by high accuracy and relative simplicity and it can be effectively realized using MS Excel software.Metal nanopowder is one of the most prospective high-energy materials that is widely used in many spheres [1,2]. This explains long and sustained interest in studying the features of metal nanopowder, in particular the kinetics of oxidation [3]. The proceeding heterogeneous reaction can be in full measure characterized by the so-called "kinetic triplet" -the frequency factor A, the activation energy and the mathematical description of the reaction mechanism f(α) [4,5,6].To identify these three parameters, the data of the derivatographic experiment conducted in the non-isothermal mode are used, when the change in the degree of transformation of the material α over time t is described by the differential equationUnder the temperature-linear heating where the rate of temperature increase T with a given parameter β = ⁄ and a specific mechanism (α) = (1 − α) , the kinetic equation (1) can be represented aswhere n -order (index) of reaction. Equation (2) has no analytical solution and numerical methods or approximate analytical ones are used to determine the kinetic parameters.The aim of this paper is to represent a quantitative result analysis of the derivatographic study of oxidation on the basis of a new approach to calculating the kinetic parameters of a  Corresponding author: bvborisov@tpu.ru

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confidence: 99%

“…Equation (2) has no analytical solution and numerical methods or approximate analytical ones are used to determine the kinetic parameters.…”

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confidence: 99%

Identification of kinetic triplets by results of derivatographic analysis

Bondarchuk

Borisov

2018

MATEC Web Conf.

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“…Today, there are chemical-metallurgical methods for the production of powders. Method [9] consists in the reduction of nanosized iron hydroxide with hydrogen at high temperatures, and method [10] in the plasma-chemical production of metal oxide powders.…”

Section: Introductionmentioning

confidence: 99%

Determination of Optimal Modes for the Production of Micro Range Metal Powders

Kuznetsov¹,

Il'yashchenko²,

Lavrova³

et al. 2022

Applied Engineering Letters

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This paper presents the results of working out the modes of obtaining micro range powders according to the developed method. It is based on the navigation on the material of the vortex plasma flows of heterogeneous plasma and synchronized high-frequency impact on the electrode. The formation of powders is derived from individual particles heated and accelerated using a high-temperature gas jet -plasma. It is obtained in a special original plasma generator by blowing the plasma-forming inert gas into an electric arc resulting between two electrodes. The possibility of obtaining powders of various sizes and chemical composition by this method on the developed technology has been established. The design of the executive equipment that implements the studied generation process of the micro-size range is best suited for steel wires. Experimental studies made it possible to determine the optimal modes for wires of various chemical composition (steel wire, with a diameter of 1.2 mm, OK Autrod 347Si with a diameter of 0.8 mm). Range of parameters and modes of actuating equipment: current of 70-80A; Plasma-forming gas pressure 0.7-0.8 atm., Wire feed rate 20-40 mm/s, the frequency of ultrasonic oscillations of 50 MHz and 100 MHz. In these conditions, powders are obtained with a dimension of 50-100 μm.

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“…There exist various areas of application of plasma processes: in chemical industry for producing polymers [1,2], removing corrosion layers [3], residuals [4], powders [5,6], deposition of films and membranes [7,8,9], separation of isotopes [10], obtaining metals and metal oxides [11,12,13,14,15,16,17], biotechnology [18], microbiology, medical technology [19], geophysics [20], textile industry [21]. One of the most challenging trends of civil engineering is the production of pigments used as paints as coatings.…”

Section: Introductionmentioning

confidence: 99%

The Application of Plasma Processes during the Production of Pigments

Vyboishchik

Popov

2021

MATEC Web Conf.

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The article describes the application of plasma in the production of industrial pigments. Plasmatrons, or cooled electrodes, have found practical use in chemical, petrochemical, metallurgical, and other industries. Plasma-chemical methods with the use of plasmatrons have found application in the yielding of high-quality pigments, e.g. titanium dioxide. The disadvantage of the application of plasmatrons is the dilution of the outgoing chlorine with inert gases, which reduces the service life of plasmatrons. The disadvantage can be eliminated by substituting high frequency induction plasma with arc plasma.

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Plasma-chemical method for producing metal oxide powders and their application

Cited by 5 publications

References 3 publications

Identification of kinetic triplets by results of derivatographic analysis

Identification of kinetic triplets by results of derivatographic analysis

Determination of Optimal Modes for the Production of Micro Range Metal Powders

The Application of Plasma Processes during the Production of Pigments

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