The Effect of Temperature on the Purity of Nano-Scale Tantalum Powder Produced from Its Scrap by Reaction with Magnesium and Calcium

Iranian Journal of Materials Science and Engineering

Gholam Hussein Borhani¹  Sadegh Soltani¹  Saeed Reza Bakhshi¹ 

[1] Dept. of Materials Eng., Malek-ashtar University of Tech.;

关键词: tantalum;    refractory metal;    magnesium;    recovery process;    magnesiothermic reduction;   

DOI  :  

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown