Enrichment of W2B5 from WO3 and B2O3 by Double SHS Method

Authors

  • Bora DERIN Istanbul Technical University
  • Sertac YAZICI

DOI:

https://doi.org/10.5755/j01.ms.24.1.17834

Keywords:

W2B5, WO3, double SHS, leaching, XRD

Abstract

A second self-propagating high-temperature synthesis (SHS) was carried out to enrich the W2B5 content in the SHS product containing a mixture of various tungsten boride compounds. In the experiment, the process called Double-SHS (D-SHS) was conducted in two steps. In the first SHS reaction, an initial molar composition ratio of WO3:B2O3:Mg mixture was selected as 1:3:8. The product was then hot-leached with hydrochloric acid to eliminate MgO and Mg3B2O6 phases. The leached product, consisting of 72.6 wt.% W2B5, 16.1 wt.% WB, 8.4 wt.% W2B, and 2.9 wt.% W, was again reacted with the Mg and B2O3 mixture by second SHS. After another acid leaching step, W2B5 content in the D-SHS product was found to be 98.2 wt.%. The study showed that D-SHS is an effective method for boron enrichment in the tungsten compounds.

DOI: http://dx.doi.org/10.5755/j01.ms.24.1.17834

Author Biography

Bora DERIN, Istanbul Technical University

Bora Derin, PhD.

Assoc. Prof., Istanbul Technical University

Metallurgical and Materials Eng. Dept.

Maslak/ Istanbul/ Turkey

Phone : +90 212 2853367

E-mail: bderin@itu.edu.tr

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Published

2018-02-18

Issue

Section

METALS, ALLOYS, COATINGS