Abstract
ZrB2@A1(OH)3‐Y(OH)3 core‐shell composite particles are synthesized by co‐precipitation method for strengthening the antioxidation of ZrB2 at high temperature. To reach better A1(OH)3‐Y(OH)3 composite shell and higher coating ratio on the ZrB2 particles surfaces, ZrB2 particles must be adequately dispersed in the ZrB2 suspension during the coating process. The dispersibility of ZrB2 particles under different conditions is investigated by the sedimentation method. Through test and analysis, the optimum conditions of the dispersibility of ZrB2 particles in the ZrB2 suspension are sedimentating for 15 minutes, ultrasonic dispersion for 10 minutes, the lower ZrB2 concentration, pH=9, the dispersant content for the 2% volume of ZrB2 suspension, and using the polyelectrolyte dispersant, respectively.
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