Synthesis of γ-alumina nanoparticles by wire-explosion process: Characterisation and formation mechanism

Ranjan, Prem; Sarathi, R.; Suematsu, Hisayuki; Selvam, Esun; Selvam, Parasuraman; Jayaganthan, R.

doi:10.1109/ichveps.2017.8225961

Cited by 3 publications

(2 citation statements)

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“…high temperature oxidation of boehmite powder [5], or precipitation method [6]. Recently, a single method wire explosion process (WEP) was employed to produce alumina NPs in oxygen gas ambient [7] and in deionized water [8]. WEP (also known as pulsed wire discharge, PWD) is a top-down approach where a wire (aluminium, Al) and the cooling/reacting medium (oxygen) are the starting materials.…”

Section: Introductionmentioning

confidence: 99%

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Role of energy and gas pressure on phase evolution of nano-alumina in wire explosion process

et al. 2022

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Phase control of alumina nanoparticles (NPs) is successfully shown by wire explosion process under gas ambient. Aluminium wire was exploded at different levels of energy in oxygen ambient under pressures of 20 and 180 kPa. X-ray diffraction patterns indicate that the 20 kPa tests yield δ-alumina while 180 kPa tests yield γ-alumina NPs with an appropriate value of energy. Spherical NPs were obtained as visualised from SEM and TEM micrographs. Size of NPs decreased with an increase in energy and/or a decrease in pressure of oxygen. The formation mechanism of different phases and sizes of NPs are detailed in this paper.

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Section: Introductionmentioning

confidence: 99%

“…Fast quenching of the vapour leads to formation of alumina NPs. Many types of NPs like metallic, oxides and alloys could be produced by changing the wire and using an appropriate ambient [7][8][9][10][11]. NPs produced by WEP have been tested for many applications.…”

Section: Introductionmentioning

confidence: 99%