Abstract
As the first step to study the boronizing of metals with BCl3 and H2, some fundamental experiments were carried out to prepare BCl3 according to the following reaction:
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By reacting gaseous chlorine with homogeneous and porous material which was obtained by sintering a mixture of H3BO3 and C with a stoichiometric composition corresponding to equation (1), BCl3 could be easily prepared and BCl3 was obtained with the rate of about 1 mol/hr at a Cl2 flow rate of 1.9 mol/hr. It was found that contact time [NA0W⁄F]lim was about 1 [(kg-sintered material)×hr/(kg-Cl2)] at 900°C and decreased with increasing reaction temperature and that the apparent activation energy of this reaction was about 11 kcal/mol. From the result of chemical analysis, the purity of the obtained BCl3 was determined to be 99.8 wt%.
