Combined equipment for synthesis of ultrafine metals and metal compounds powders via Flow-Levitation and crucible methods.

Abstract

Laboratory automated equipment for synthesis of ultrafine particles of metals, alloys and metal compounds via evaporation-condensation Flow-Levitation Guen-Miller method combined with crucible method using high-frequency (440 kHz) electromagnetic field for heating is described. The equipment synthesizes the said particles and multilayer core-shell structures with mean size ranging from tens to hundreds of nanometers with output from grams to tens of grams per hour. Synthesized particles may be collected into container with inert gas, or into non-volatile liquid, or in situ passivated with air for further handling. Examples of synthesized particles are presented.

Effect of porosity on rapid dynamic compaction of nickel nanopowder

“…Smooth spherical nickel nanoparticles were prepared by the flow-levitation method. 31 The micrograph of the grains is shown in Fig. 1.…”

Structure of Shock Wave in Nanoscale Porous Nickel at Pressures up to 7 GPa

“…The material studied has been thoroughly described in our previous work [ 10 ]. Briefly, nanosized nickel particles (nNi) were synthesized using the flow-levitation method [ 18 ]. X-ray diffraction analysis demonstrated that the particles consisted primarily of metallic nickel with a small NiO x oxide content of less than 0.3% weight.…”

Obtaining nickel nanoparticles by the gas-phase method - induction flow levitation

“…Therefore, in this work, we consider a new method of induction flow levitation for obtaining high-purity nickel nanoparticles. This method makes it possible to obtain nanosized particles with a narrow size distribution directly from bulk metal samples without the use of auxiliary reagents, which distinguishes it favorably from other methods for the synthesis of nanoparticles [19][20][21]. The resulting nanoparticles were characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (SEM-EDS), Xray phase analysis (XRD), transmission electron microscopy (TEM), and porosimetry.…”