均匀实验优化Bi_4Si_3O_(12)粉体制备工艺

Optimization for Preparing Technology of Bi_4Si_3O_(12) Powders by Uniform Experiment

本文运用均匀实验设计,研究各工艺参数（原料比,球磨时间,保温时间,煅烧温度等）对固相法制备Bi4Si3O12粉体的影响。通过均匀实验数据直观分析,可以初步确定煅烧温度为800~850℃,氧化铋的挥发量可以忽略。并进行SPSS数据处理可知,煅烧温度对杂相数目的影响显著,其余因素为不显著。最终确定最佳纯度的Bi4Si3O12粉体制备工艺参数：Bi2O3∶SiO2（mol%）为1∶1.5,球磨时间为5 h,煅烧温度为830℃,保温时间3 h。

In this paper,with uniform experiments,the effects of various technological parameters（the ratios of raw materials,milling time,holding time,sintering temperature,and so on） on Bi4Si3O12 powders prepared by solid state method were investigated.Through directly analyzing data obtained by uniform experiment,it was preliminary determined that the sintering temperature was 800-850 ℃ and the amount of bismuth oxide was not excessive.By dealing with data of SPSS,the influence of sintering temperature on the number of impurity was outstanding and the others were not remarkable.Finally,the technological parameters of Bi4Si3O12 powders with the optimal purity were confirmed： sintering temperature was 830 ℃,holding time was 3 h,the mole ratio of Bi2O3 and SiO2 was 1∶1.5,and the milling time was 5 h.