Title of article :
The Effect of Temperature on the Purity of Nano-Scale Tantalum Powder Produced from Its Scrap by Reaction with Magnesium and Calcium
Author/Authors :
Borhani, Gholam Hussein Department of Materials Engineering - Malek-Ashtar University of Technology - Shahinshahr - Isfahan, Iran , Bakhshi, Saeed Reza Department of Materials Engineering - Malek-Ashtar University of Technology - Shahinshahr - Isfahan, Iran , Soltani, Sadegh Department of Materials Engineering - Malek-Ashtar University of Technology - Shahinshahr - Isfahan, Iran
Abstract :
In this study, Ta powder was produced from Ta scarp via chemical processes using Mg and Ca powders.
Initially, tantalum scraps were converted to tantalum oxide (Ta2O5) at 1100°C in an oxygen atmosphere. Tantalum
oxide was then reduced to Tantalum powder with Mg in a vacuum environment at 950 to 1200°C for 3 hours. The
obtained Ta powders further were reacted with Ca at 950°C for 5 hours in a vacuum atmosphere. The powders were
analyzed using X-ray diffraction (XRD), scanning electron microscopy (SEM), as well as conducting oxygen content
measurement. The results showed that the average particle size of the produced Ta powders was around 58 nm with
oxygen contents of 250 ppm.
Keywords :
magnesiothermic reduction , tantalum , refractory metal , magnesium , recovery process
Journal title :
Iranian Journal of Materials Science and Engineering
