Production of ultradispersed powders with electric explosion method

Yavorovsky, N.; Domashenko, V.G.; Balukhtin, P. V.

doi:10.1109/korus.2000.866099

Cited by 10 publications

(13 citation statements)

References 3 publications

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“…However, for 2θ less than 38°, as the sample holder is made of quartz, a small amount of this material is analyzed, which can be ignored [ 24 ]. This is in contrast to other similar works that characterized Al x O y phases in their XRD analysis [ 12 , 14 , 28 , 29 , 30 ]. The chemical composition and structure of Al-NPs is determined by the corresponding XRD pattern.…”

Section: Identification and Characterization Of High-purity Npscontrasting

confidence: 91%

Experimental Analysis and Characterization of High-Purity Aluminum Nanoparticles (Al-NPs) by Electromagnetic Levitation Gas Condensation (ELGC)

2020

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The production of high-purity aluminum nanoparticles (Al-NPs) is challenging due to the highly reactive nature of Al metals. Electromagnetic levitation gas condensation (ELGC) is a promising method to produce high-purity metallic particles as it avoids the interaction between molten metal and refractory-lined, which guarantees the removal of impurities such as oxygen (O). In this research, high-purity Al-NPs were successfully fabricated via ELGC process and fully characterized. The effects of power input and gas flow rate on particle size and distribution were analyzed using field emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS), and dynamic light scattering (DLS). The results showed that the Al-NPs have spherical morphologies with an average diameter of 17 nm and size distribution of NPs is narrow under helium (He) flow rate of 15 L/min at a constant temperature of 1683 ± 10 K. The purity of the NPs was confirmed by utilizing X-ray diffraction (XRD), atomic absorption spectroscopy (AAS), and X-ray fluorescence (XRF). Finally, metal purity of 99.976% and 99.97% was measured by AAS and XRF analyses, respectively. Moreover, it was found that increasing gas flow rate and sample temperature results in a decrease in the particle size. The particle sizes for the Al-NPs obtained under He atmosphere were smaller than those obtained under Ar atmosphere.

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Section: Identification and Characterization Of High-purity Npscontrasting

confidence: 91%

Experimental Analysis and Characterization of High-Purity Aluminum Nanoparticles (Al-NPs) by Electromagnetic Levitation Gas Condensation (ELGC)

2020

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“…The EEW energy characteristics and the properties of the obtained powders are shown in Table 1. The selected explosion conditions ensure the EEW to include the arc discharge phase [3,4]. The level of the specific energy injected into the wire during the explosion is determined by the strength of gas, the explosion is conducted in.…”

Section: Resultsmentioning

confidence: 99%

“…the presence of crystal and amorphous phase in their structure, various structural modifications and alteration of structural characteristics of the material. The electric explosion of wires (EEW) is one of the ways for producing such particles [3][4][5]. The properties of the particles produced by EEW are determined both by the parameters of an electric circuit and characteristics of the wire, and by the physicochemical properties of the gas atmosphere the explosion is conducted in.…”

Section: Introductionmentioning

confidence: 99%

Production of Iron Nanopowders by the Electric Explosion of Wire

Pustovalov

Журавков

2015

AMR

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The work presents the study of the properties of nanopowders produced bythe electric explosion of wire (EEW) in the atmosphere of Ar, CO, CO2, N2. It was established that with the increase of theelectric strength of a gas the wire acquires more energy, enabling the reduction of a particle average size. The EEW in gaseous media that have high dissociation energy (N2 and CO) produces metal powders that consist of crystalline α-Fe и γ-Fe. EEW products obtained in СО2 consist of α-Fe and bivalent iron oxide.

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“…The powder contained less than 93 wt.% of active aluminum, 3-5 wt.% of aluminum oxide and aluminum hydroxide, and 2-5 wt.% of adsorbed gases. The particles were of a spherical shape and a log-normal size distribution [17,18].…”

Section: Methodsmentioning

confidence: 99%

Effect of Ammonium Perchlorate and Aluminum Composition Density on Characteristics of Laser Ignition

Medvedev

Tsipilev

Forat

2018

Propellants Explo Pyrotec

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Laser ignition of stoichiometric mixture based on aluminum nanopowder and ammonium perchlorate were studied experimentally. The laser with a radiation wavelength of 1.06 μm and a pulse duration of 0.8 ms was used as a source of heat. The ignition thresholds were determined for open samples in the air and for samples confined with transparent dielectric. The difference in the obtained data is discussed within the thermal ignition theory.

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Production of ultradispersed powders with electric explosion method

Cited by 10 publications

References 3 publications

Experimental Analysis and Characterization of High-Purity Aluminum Nanoparticles (Al-NPs) by Electromagnetic Levitation Gas Condensation (ELGC)

Experimental Analysis and Characterization of High-Purity Aluminum Nanoparticles (Al-NPs) by Electromagnetic Levitation Gas Condensation (ELGC)

Production of Iron Nanopowders by the Electric Explosion of Wire

Effect of Ammonium Perchlorate and Aluminum Composition Density on Characteristics of Laser Ignition

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