Preliminary Study on Pilot Plant Test Preparation of Micrometer Ceria by Ammonium hydroxide-Oxalic acid Co-precipitation Method

The preparation of micrometer ceria by co-precipitation method was discussed,and the roast temperature was 800℃,the pH of ammonium bicarbonate-oxalic acid was 1～6.Several micrometer ceria was synthesized and the optimum conditions were investigated as followed: ammonium hydroxide-oxalic acid coprecipitation method,aging time 1h,the concentration of CeCl3 was 1mol/L,agitation speed was 400r/min.Oxalic acid and ammonia were as precipitation agents to precipitate cerium chloride,the effect of reaction temperature,material density,stirring intensity and aging time on the size of oxalate was observed and then different particle size of oxalate was prepared according to the result.