Synthesis of Gadolinium(III) Bromide and Modeling by the Experimental Design Method

Abstract

<em>In the present work, we have synthesizedgadolinium(III) bromide, GdBr₃ from the gadolinium oxide, Gd₂O₃by sintering brominating with ammonium bromide, NH₄Br. The influence of three main synthesis parameters (contact time, stoichiometry, and temperature) on the reaction yield was studied and optimized. This study showed that the optimum conditions for the synthesis of GdBr₃are the following: contact time t = 90 min, stoichiometry in moles (Gd₂O₃:NH₄Br = 1:18) and temperature T = 350 °C. The reaction yield for these parameters was equal to 97.27%. The modeling of the results of our experiments using a 2³full factorial design with six replicates at the center point gives us a first-degree model where it is clear that the reaction yield is a function of these three parameters.</em>