Particle growth, mechanism

Fig. 6. TEM images of lanthanum phosphate 3.3. Particle growth mechanism particle. (0°C, pH = 1.7)...

Our approach is to assume that idl PSD s have an origin in growth that tends to produce a log normal population. This is reasonable since nearly all, if not all, particle growth mechanisms are rcmdom in nature. Hence, we expect to... 

Smith, P.G. and Nienow, A.W., Particle growth mechanisms in fluidised bed granulation - part I. The effect of process variables, Chem. Eng. Sci., 38 (1983) 1223-1231. 

Only Smith and Nienow (1983a) have reported a systematic investigation of the effects of gas velocity on granule size and on particle growth mechanisms. These authors used model materials (non-porous... 

In the case of supported metal particles, experimental studies of particle growth mechanisms can determine the type of ripening. Generally, studies on supported noble metallic catalysts at elevated temperatures (>500°C) indicate atomic diffusion from smaller metal particles across the surface of the support to... 

Fig. 1.2.5 Schematic diagram of particle growth mechanism in solution. (From T. Sugi-moto, Hyomen Surface, 29, 978 (1991). Courtesy of T. Konno, Koshinsya, Tokyo.)...

Another aspect of the seeding experiment is that it provides us with important information on the particle growth mechanism, as mentioned in Section 1.3 in Chapter 1. The total reaction for the formation of the BAS particles is greatly accelerated... 

Although detailed and extensive, these works have not presented a definitive mechanism for particle nucleatlon and growth in styrene mlcroemulslon polymerization. This paper describes a kinetic investigation of this system using water-soluble and oil-soluble initiators and a comparison of mlcroemulslon polymerization with conventional emulsion polymerization and mlnlemulslon polymerization, to determine the nucleatlon and particle growth mechanism. 

Removal of coordinating ligands by careful calcination prior to reduction, is therefore extremely important for metal/zeolite catalysts, because it controls the cation locations and thus the metal particle growth mechanism during subsequent reduction. It has been demonstrated that the ultimate metal dispersion depends on the temperature of the calcination (50,69,71,79,107). An optimum calcination temperature can be defined for obtaining maximum dispersion of metals in zeolites. 

The seeded technique was used to study particle growth mechanisms involved in semibatch surfactant-free emulsion polymerisation of butyl acrylate. Data are given for agitation speed, initiator concentration, monomer feed rate, and buffer concentration. A carboxylic seed latex was also prepared to study particle growth mechanisms. 10 refs. CHINA... 

Fink et al. [60] have highlighted that the particle growth mechanism is associated with a polymerization kinetic profile in which an initial induction period is followed by an acceleration stage after which, in the absence of chemical deactivation, a stationary polymerization rate is obtained, as indicated in Figure 3.14. 

Depending on the application, carbon dioxide can act either as a solvent, an antisolvent, or as a solute in the SCF processes. SCF technologies are further classified based on the particle growth mechanisms and their collection environment. Rapid expansion of supercritical solutions (RESS), gas antisolvent (GAS) precipitation. 

The particle growth mechanism is amenable to study in some cases, which in turn makes possible the prediction and systematic manipulation of the final nanocrystal structure. 

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