EFFECT OF HCl CONCENTRATION ON ZrB2 SEPARATION FROM A SELF-PROPAGATING HIGH- TEMPERATURE SYNTHESIS (SHS) PRODUCT


Akkas B., Alkan M., Derin B. , Yücel O.

TMS 140th Annual Meeting and Exhibition, California, United States Of America, 27 February - 03 March 2011, pp.499-504 identifier

  • Publication Type: Conference Paper / Full Text
  • City: California
  • Country: United States Of America
  • Page Numbers: pp.499-504

Abstract

The self-propagating high-temperature synthesis (SHS) of zirconium diboride followed by hydrochloric acid leaching was carried out in this study. In the SHS stage, the initial mixture of B2O3, ZrO2 and Mg powders were ignited and then a mixture of the ZrB2, MgO, Mg3B2O6 and Mg2B2O5 were formed. In the leaching step, the SHS product was leached in the acid solution to remove impurities i.e. MgO, Mg2B2O6 and Mg2B2O5. The effects of temperature and acid concentration on the selective leaching were investigated. The obtained products were characterized by using X-ray diffraction and SEM techniques.