en Research Paper Research Paper In this study, Ta powder was produced from Ta scarp via chemical processes using Mg and Ca powders. At first, Tantalum scraps were converted to Tantalum oxide (Ta₂O₅) at 1100˚C in an oxygen atmosphere. Tantalum oxide was 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 through X-ray diffraction patterns (XRD), scanning electron microscopy (SEM), as well as oxygen measurement. The results show that the average particles size of the produced Ta powders is about 58 nm with oxygen contents of 250 ppm. tantalum,refractory metal,magnesium,recovery process,magnesiothermic reduction 1 7 http://ijmse.iust.ac.ir/browse.php?a_code=A-10-2605-1&slc_lang=en&sid=1 Gholam Hussein Borhani borhani_g@yahoo.co.uk 1800319475328460014692 1800319475328460014692 No Dept. of Materials Eng., Malek-ashtar University of Tech. Saeed Reza Bakhshi bakhshisr@mut-es.ac.ir 1800319475328460014693 1800319475328460014693 Yes Dept. of Materials Eng., Malek-ashtar University of Tech. Sadegh Soltani sadeghsoltani077@gmail.com 1800319475328460014694 1800319475328460014694 No Dept. of Materials Eng., Malek-ashtar University of Tech.