Characterization of pure Ni ultrafine/nanoparticles synthesized by electromagnetic levitational gas condensation method. (February 2016)

• Record Type: Journal Article
• Authors: Khodaei, Azin; Hasannasab, Malihe; Amousoltani, Narges; Kermanpur, Ahmad
• Is Part Of: Materials research bulletin. Volume 74(2016)
• Page Start: 212
• Page End: 217
• Publication Date: 2016-02
• Subjects: Nanoparticles -- Ni -- Electromagnetic levitation melting -- Gas condensation; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2015.10.031
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: Ni ultrafine/nanoparticles were produced using the single-step ELGC method. Ar and He–20%Ar gas mixtures were used as the condensing gas under 1 atm. Effects of gas type and flow rate on particle size distribution were investigated. The nanoparticles showed both high saturation magnetization and low coercivity. Abstract: In this work, Ni ultrafine/nanoparticles were directly produced using the one-step, relatively large-scale electromagnetic levitational gas condensation method. In this process, Ni vapors ascending from the levitated droplet were condensed by Ar and He–20%Ar gas mixtures under atmospheric pressure. Effects of type and flow rate of the condensing gas on the size, size distribution and crystallinity of Ni particles were investigated. The particles were characterized by scanning electron microscopy, X-ray diffraction and vibrating sample magnetometer (VSM). The process parameters for the synthesis of the crystalline Ni ultrafine/nanoparticles were determined.