SGER: Exploratory Study on Aerosol Synthesis of Nanoparticles (Effect of Electric Fields in Flame Reactors)

摘要CTS-9612107 研究了在简单火焰气溶胶反应器中颗粒荷电对纳米陶瓷粉体合成的影响。 在此基础上，验证了预测模型的有效性，该模型表明电场可以减小颗粒尺寸并缩小尺寸分布。 关于电场对气溶胶粒子尺寸和尺寸分布的影响，气溶胶学界存在着相互矛盾的观点。 充电的作用将在预混火焰中进行测试。 钛、硅和锡的氧化物的合成将从它们的氯化物获得。 粒子将通过电晕放电的火焰中的离子风或通过将火焰中产生的离子定向到外部电极而带电。 选择待测试的材料是因为其不同的材料特性及其技术相关性。 如果概念验证测试成功，所提出的概念可能会导致在大生产率下产生更细、均匀的纳米颗粒方面的显著改进，最终具有受控的结晶度。 该研究的直接应用是制造用于颜料、陶瓷、半导体和化妆品的气相二氧化硅粉末和二氧化钛

ABSTRACT CTS-9612107 The effects of particle charging in synthesis of nanosize ceramic powders in simple flame aerosol reactors will be investigated. On this basis, the validity of a predictive model which would indicate the electric fields can reduce the particle size and narrow the size distribution will be tested. There are conflicting opinions in aerosol community concerning the effect of the electrical field on particle size and size distribution. The role of charging will be tested in premixed flames. Synthesis of oxides of Ti, Si and Sn will be obtained from their chlorides. The particles will be charged either by ionic wind in the flame by a corona discharge or by orienting the ions generated in the flame to external electrodes. The materials to be tested were selected because of their diverse material properties and their technological relevance. The proposed concepts may lead to significant improvements in generation of finer, uniform nanoparticles, eventually with controlled cristallinity, at large production rates, if the proof-of-concept tests will be successful. Direct applications of the research are in manufacture of fumed silica powders and titania for pigments, ceramics, semiconductors and cosmetics