CAJ | 학술논문

采用正交实验和单因素实验相结合的方法，研究了球磨工艺参数（包括粉体质量分数、球磨机转速、球磨时间、球料比和球配比）对微细La2O3水悬浮液分散性的影响及其作用机理，获得了优化后的球磨工艺参数，据此制备出的悬浮液的粉体分散率高达97．88％。粒度测试结果表明采用优化的工艺参数球磨后得到的La2O3颗粒更加细小，分布更加均匀，计算出单个粒径为6μm的La2O3颗粒经过球磨后可以得到球径为1．5μm的颗粒数与球径为0．25μm的颗粒数之比约为1：195。根据Stokes定律和爱因斯坦方程获得了微细La2O3颗粒沉降位移及扩散位移与其粒度间的函数曲线，从而揭示出采用优化球磨工艺参数球磨后微细La2O3水悬浮液的高分散机理。
채용정교실험화단인소실험상결합적방법，연구료구마공예삼수（포괄분체질량분수、구마궤전속、구마시간、구료비화구배비）대미세La2O3수현부액분산성적영향급기작용궤리，획득료우화후적구마공예삼수，거차제비출적현부액적분체분산솔고체97．88％。립도측시결과표명채용우화적공예삼수구마후득도적La2O3과립경가세소，분포경가균균，계산출단개립경위6μm적La2O3과립경과구마후가이득도구경위1．5μm적과립수여구경위0．25μm적과립수지비약위1：195。근거Stokes정률화애인사탄방정획득료미세La2O3과립침강위이급확산위이여기립도간적함수곡선，종이게시출채용우화구마공예삼수구마후미세La2O3수현부액적고분산궤리。
Both orthogonal experiment and single factor experiment were used to investigate the effect of ball milling process （including the mass fraction of the powder, rotation speed, milling time, weight ratio of ball to slurry and ball ratio） on the dispersion of water slurry with micro La2O3 powder, and its mechanism was stud- ied. The optimized process parameters were obtained, and it can make the dispersion rate of the slurry arrive to 97.88%. It has been found that the micro La2O3 particles were smaller with uniformly distribution than before by measuring particles size distribution under the optimized process parameters of ball milling. Calculation re- sult showed that one La2O3 particle of 6 micron was break down to 1.5 and 0.25μm with about 1 ： 195 ratio. The curve of settling displacement and diffusion displacement with granularity was given according to the Stokes law and Einstein equation. Settling displacement was equal to diffusion displacement when the particle diameter was 0.23μm, which can be calculated from above curve. And the diffusion mechanism on water slurry of micro La2O3 with excellent capability of dispersion after ball milling with the optimized process parameters was revealed.