DRAG ON SUBMICRON NANOPARTICLE AGGREGATES  

作　　者：F.Einar Kruis 

机构地区：[1]Faculty of Engineering Sciences University of Duisburg-Essen Campus Duisburg Bismarckstraβe 81 47057 Duisburg Germany,

出　　处：《China Particuology》2005年第1期67-67,共1页

摘　　要：A new procedure was developed for estimating the effective collision diameter of an aggregate composed of primary particles of any size. The coagulation coefficient of two oppositely charged particles was measured experimentally and compared with classic Fuchs theory, including a new method to account for particle non-sphericity. A second set of experiments were performed on well-defined nanoparticle aggregates at different stages of sintering, i.e. from the aggregate to the fully sintered stage. Here, electrical mobility was used to characterize the particle drag. The aggregates are being built from two different size-fractionated nanoparticle aerosols, the non-aggregated particles are discarded by an electro-filter and then they are passed through a furnace at concentrations low enough not to induce coagulation.A new procedure was developed for estimating the effective collision diameter of an aggregate composed of primary particles of any size. The coagulation coefficient of two oppositely charged particles was measured experimentally and compared with classic Fuchs theory, including a new method to account for particle non-sphericity. A second set of experiments were performed on well-defined nanoparticle aggregates at different stages of sintering, i.e. from the aggregate to the fully sintered stage. Here, electrical mobility was used to characterize the particle drag. The aggregates are being built from two different size-fractionated nanoparticle aerosols, the non-aggregated particles are discarded by an electro-filter and then they are passed through a furnace at concentrations low enough not to induce coagulation.

分 类 号：TB383.1[一般工业技术—材料科学与工程]