Manufacturing of Materials by Aerosol Processes

Skillas, G.; Maisels, A.; Pratsinis, Sotiris E.; Kodas, Toivo T.

doi:10.1002/9781118001684.ch35

Cited by 3 publications

(2 citation statements)

References 133 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Unlike other aerosol processes, flames have high production rates and low energy costs, and the potential for scale-up is well established. [23] Figure 7 illustrates the process of particle formation by flame synthesis. Reactants are brought to a high temperature reactor either premixed or separately (nonpremixed) in a coflow configuration.…”

Section: Production Methods Of Nanosized Structuresmentioning

confidence: 99%

Montecarlo Simulation of Two Component Aerosol Processes

Huertas¹

2016

View full text Add to dashboard Cite

Associate professor at Los Andes University until 2002. Currently, full time professor at Tecnológico de Monterrey, Mexico. Has leaded the Energy Research Group in Colombia and the Automotive Engineering Research Center-CIMA in Mexico. Has published 45 papers mainly related to combustion and air pollution. Has graduated 6 PhD and 61 MSc. students. Has completed 90 research projects financed by private companies and governmental institutions. Currently works as researcher of the Energy and Climate Change Group of the School of Science and Engineering at Tecnológico de Monterrey. Is member of the national system of researcher in both Mexico and Colombia. PrefaceNanophase materials also referred to as nanostructured, nanocrystalline, or nanometer-sized crystalline solids, are single-phase or multiphase polycrystals, with dimensions of the order of 1-100 nm. Compared to conventional materials, nanophase materials possess unique advantages with respect to properties and processing. As grain size decreases down to the nanometer-size range, nanophase metals generally get stronger and harder, while nanophase ceramics show ductility, even superplasticity, at lower temperatures than conventional brittle ceramics. For example, 1000% increase in fracture stress, 2000% increase in magnetic susceptibility, 25% decrease in density, and 165% improvement in critical temperature for superconductivity have been observed in nanophase metals.The high-performance properties exhibited by nanophase materials have important implications for industry. For example, several tool companies are expected to introduce stronger, tougher, long-lasting cutting tools, drill bits, and wear parts composed of ultrafine grain cobalt/tungsten carbide composites. Some nanocomposites exhibit an unusual magnetic behavior called "giant magnetoresistance," which is being considered for read/write information in storage devices and to make improved magnetoresistive sensors. Another application under consideration is solid-state magnetic refrigerators based on the mega caloric effect by which heat is reversibly absorbed and discharged when small ferromagnetic particles are aligned by magnetic fields. In addition, unusual magneto-optical characteristics of nanostructured iron oxide are expected to be applicable for high definition color copiers. This book describes a novel method for the production of high purity, unagglomerated nano-particulates of tungsten (W) and tungsten titanium alloys (W-Ti) by flame synthesis. These materials possess unique properties that make them desirable for advanced applications.W-Ti nano-sized alloys have a combination of high strength (800-1000 MPa), high ductility (10-30%), good e1ectrical and thermal conductivity, corrosion resistance, and excellent machinability. Current applications for W and W-Ti inc1ude counterbalances in military aircraft, radiation shields, lighting components, ignition electrode materials, catalysts in the chemical industry, alloying elements for high speed steels, sputter targets in VLSI chip technology...

show abstract

Section: Production Methods Of Nanosized Structuresmentioning

confidence: 99%

Montecarlo Simulation of Two Component Aerosol Processes

Huertas¹

2016

View full text Add to dashboard Cite

show abstract

“…By 2015, this market is predicted to grow to 7.4 billion US$ (Schlag et al 2011), with revenues from products incorporating these nanomaterials reaching 2.5 trillion US$ (Hwang and Bradley 2010) and 2 million workers employed in the nanotechnology sector (Roco 2011). While flame aerosol processes currently are the most widely used in manufacturing commercial quantities of nanoparticles (Skillas et al 2011), inductively coupled thermal plasma (ICP) technologies are emerging as a promising alternative.…”

Section: Introductionmentioning

confidence: 99%

Aerosol emission monitoring in the production of silicon carbide nanoparticles by induction plasma synthesis

et al. 2013

View full text Add to dashboard Cite

In this study, the synthesis of silicon carbide (SiC) nanoparticles in a prototype inductively coupled thermal plasma reactor and other supporting processes, such as the handling of precursor material, the collection of nanoparticles, and the cleaning of equipment, were monitored for particle emissions and potential worker exposure. The purpose of this study was to evaluate the effectiveness of engineering controls and best practice guidelines developed for the production and handling of nanoparticles, identify processes which result in a nanoparticle release, characterize these releases, and suggest possible administrative or engineering controls which may eliminate or control the exposure source. No particle release was detected during the synthesis and collection of SiC nanoparticles and the cleaning of the reactor. This was attributed to most of these processes occurring in closed systems operated at slight underpressure. Other tasks occurring in more open spaces, such as the disconnection of a filter assembly from the reactor system and the use of compressed air for the cleaning of filters where synthesized SiC nanoparticles were collected, resulted in releases of submicrometer particles with a mode size of *170-180 nm. Observation of filter samples under scanning electron microscope confirmed that the particles were agglomerates of SiC nanoparticles.

show abstract