Study on Synthesis and Purification of Titanium Diboride Powder

Based on SHS reductive reaction,TiB₂ mixed powder was synthesized,and the effects of acid washing conditions on the purity of TiB₂ powder were investigated.The experimental results showed that the chemical reaction of the TiO₂ B₂O₃ Mg system consisted of two parts.In the first step,the elements of B and Ti were reduced by Mg powder,and secondly,the TiB₂ was formed by Chemical combination of the two monomer elements.The purity of TiB₂ powder mainly depends on acid washing conditions.With the concentration of hydrochloric acid and amount of excessive acid increasing and the acid washing time prolonging,the purity of TiB₂ powder increase.Moreover,with the acid washing temperature rising up,the acid washing velocity can be considerably quickened.