基于物-场模型的纳米空心镍球的制备方法研究

Study of preparation method of nanometer-sized hollow nickel spheres based on substance-field model

针对目前混镍粉电火花腐蚀制备纳米空心镍球,存在着蚀除电极金属液滴与工作液中的小气泡不能充分结合,形成中空结构的问题,采用创新设计方法及知识库进行解决.根据实际工况,构建问题物-场模型,在知识库中搜索多种场,获得相应的解决方案.运用模糊评价法对多种方案进行评价与排序,挑选出最优方案———采用超声波场代替原有的机械场,开发出超声波制备纳米空心镍球装置,较好地改善了原有系统制备空心镍球的质量和效率.

In current preparation of nanometer-sized hollow nickel spheres by nickel powder-mixed spark erosion, ablative nickel droplets and small bubbles in the working liquid could not be fully integrated to form the hollow structure. The problem could be solved by adopting innovation de- sign methods and knowledge base. According to the actual working condition, a substance-field model was settled and a variety of corresponding solutions were caught by searching multiple fields in the knowledge base. The solutions were evaluated and sorted by fuzzy evaluation meth- od, then, the optimal solution was selected that replacing the original mechanical field with ultra- sonic filed. Thus, preparation of nanometer-sized hollow nickel spheres by ultrasonic device was introduced, it could improve the quality and efficiency of preparation of hollow nickel spheres.