Aerosol Reactors for Ceramic Powder Synthesis

本研究是气溶胶反应器合成陶瓷用高质量粉末的实验和理论研究相结合的结果。被研究的粉末是氮化硅和各种金属氧化物。生产的粉末的粒度分布将作为气体成分、温度、停留时间和其他相关变量的函数进行测量。用原子吸收光谱和X射线衍射仪对粉末的化学成分和结晶度进行表征。另一家机构正在进行的一项研究将评估这些粉末在陶瓷应用中的适用性。将对反应器进行建模，考虑到颗粒成核、凝结和凝聚引起的颗粒生长以及烧结引起的集料形状变化。气溶胶反应器提供了令人兴奋的工艺来生产独特性能的粉末，用于陶瓷、光学、电气或催化应用。这项研究将有助于此类反应堆的设计和优化。

This research is a combined experimental and theoretical investigation of aerosol reactors for synthesis of high quality powders for ceramic applications. The powders to be studied are silicon nitride and various metal oxides. Size distributions of the powders produced will be measured as a function of gas composition, temperature, residence time, and other relevant variables. Powders will be characterized as to chemical composition and crystallinity by atomic absorption spectroscopy and X-ray diffraction. The suitability of the powders for ceramic application will be evaluated in an ongoing study at another institution. The reactor will be modeled accounting for particle nucleation, particle growth by condensation and coagulation, and aggregate shape change by sintering. Aerosol reactors offer exciting processes for producing powders of unique properties for use in ceramic, optical, electrical, or catalytic applications. This research should help in the design and optimization of such reactors.