The preparation and research of alumina powder by the electrical discharge machining method. (April 2015)

• Record Type: Journal Article
• Authors: Song, Z. W.; Sun, H. L.; Nie, B. X.; Yang, Z. J.; Lv, Z.
• Is Part Of: Materials research innovations. Volume 19:Number 1(2015)
• Page Start: S1-320
• Page End: S1-324
• Publication Date: 2015-04
• Subjects: Materials -- Research -- Periodicals; Matériaux -- Recherche -- Périodiques; 620.1105
• DOI: 10.1179/1432891715Z.0000000001496
• Languages: German
• ISSNs: 1432-8917

Abstract

<abstract> <title> <x content-type="archive" xml:space="preserve">Abstract</x> </title> <p>Ultrafine alumina powder was prepared through the method of electric spark plasma ablation and a study was carried out by means of X-ray diffraction, scanning electron microscopy, energy spectrum analysis and laser particle size analysis. The following conclusions were drawn: the alumina can be prepared by spark, which gives an upper layer powder and lower layer coarse powder. Upper powder is mainly γ-alumina and α-alumina, and a small portion of residual aluminium, and the particle size is a few tenths of a micrometre. Lower coarse powder is mainly two kinds of α-alumina and more residual aluminium, having a particle size of several tens of micrometres. Upper powder will be reunited, because of the presence of aluminium hydroxide powder that makes the alumina particles stick together. The thickness of the rod, pulse width and pulse interval may affect particle size.</p> </abstract>