Next Article in Journal
Formation of Surface Depression during Continuous Casting of High-Al TRIP Steel
Next Article in Special Issue
Fabrication of Functionally Graded Materials Using Aluminum Alloys via Hot Extrusion
Previous Article in Journal
Improving Shipbuilding Steel Grade Quality at Stages of Smelting, Secondary Refining, and Continuous Casting
Previous Article in Special Issue
Removal of Mg and MgO By-Products through Magnesiothermic Reduction of Ti Powder in Self-Propagating High-Temperature Synthesis
Article Menu
Issue 2 (February) cover image

Export Article

Open AccessArticle
Metals 2019, 9(2), 205;

Extraction of Tantalum Powder via the Magnesium Reduction of Tantalum Pentoxide

Titanium Department, Korea Institute of Materials Science (KIMS), Changwon, Gyeongnam 641-010, Korea
Department of Metallurgical Engineering, Pukyoung National University, Busan 48513, Korea
Authors to whom correspondence should be addressed.
Received: 22 December 2018 / Revised: 3 February 2019 / Accepted: 4 February 2019 / Published: 9 February 2019
(This article belongs to the Special Issue Metals Powders: Synthesis and Processing)
Full-Text   |   PDF [2808 KB, uploaded 9 February 2019]   |  
  |   Review Reports


The metallic tantalum powder was successfully synthesized via reduction of tantalum pentoxide (Ta2O5) with magnesium gas at 1073~1223 K for 10 h inside the chamber held under an argon atmosphere. The powder obtained after reduction shows the Ta–MgO mixed structure and that the MgO component was dissolved and removed fully via stirring in a water-based HCl solution. The particle size in the tantalum powder obtained after acid leaching was shown to be in a range of 50~300 nm, and the mean internal crystallite sizes measured by the Scherrer equation varied from 11.5 to 24.7 nm according to the increase in reduction temperatures. The temperature satisfactory for a maximal reduction effect was found to be 1173 K because the oxygen content was minimally saturated to about 1.3 wt %. View Full-Text
Keywords: tantalum powder; magnesium reduction; Ta2O5 powder; MgO; HCl solution tantalum powder; magnesium reduction; Ta2O5 powder; MgO; HCl solution

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Hwang, S.-M.; Wang, J.-P.; Lee, D.-W. Extraction of Tantalum Powder via the Magnesium Reduction of Tantalum Pentoxide. Metals 2019, 9, 205.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Metals EISSN 2075-4701 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top