Topic
Agglomerate
About: Agglomerate is a research topic. Over the lifetime, 1211 publications have been published within this topic receiving 25633 citations.
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TL;DR: In this article, the initial-, intermediate-, and final-stage sintering of fine crystallite yttria-stabilized zirconia was studied, and it was found that agglomerates limit attainable green density, interfere with the development of microstructure, impede initial-stage Sintering kinetics, and limit the potential benefit of the fine crystallites on final stage sinterings.
Abstract: The initial-, intermediate-, and final-stage sintering of fine crystallite yttria-stabilized zirconia was studied. Experiments were conducted on powder lots of differing agglomerate size and one specially prepared agglomerate-free powder. Initial-stage sintering kinetics were compared with a sintering study on larger crystallite size calcia-stabilized zirconia to access the Herring scaling law. It was found that agglomerates limit attainable green density, interfere with the development of microstructure, impede initial-stage sintering kinetics, and limit the potential benefit of fine crystallites on final-stage sintering. An gglomerate free powder centrifuge-cast to 74% green density was sintered to 99.5% of theoretical density in a 1 h 1100°C cycle, which is ∼300°C lower than necessary for an agglomerated but equal crystallite size powder.
497 citations
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TL;DR: In this paper, an actual understanding of the relation between processing conditions, state of CNT dispersion and structure of the filler network, and the resulting electrical, melt rheological and mechanical properties is presented.
466 citations
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TL;DR: In this article, burning characteristics of fuel droplets containing nano and micron-sized aluminum particles were investigated, and five distinctive stages (preheating and ignition, classical combustion, microexplosion, surfactant flame, and aluminum droplet flame) were identified.
324 citations
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TL;DR: In this article, the influence of nano-silica agglomeration on microstructure and properties of the hardened cement-based materials was investigated by using precipitated silica (PS) with very large agglomers and fumed silica with much smaller ones as nanoscale additives.
296 citations
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TL;DR: In this article, the inherent material density of diesel particle agglomerates was measured using a transmission electron microscopy (TEM) system and the results showed that the density increased from 1.27 to 1.78 g/cm 3 as particle mobility size increased from 50 to 220 nm.
Abstract: We describe a new technique to measure the size dependent inherent material density of chain agglomerate particles. Measurements were carried out for diesel soot and aluminum/alumina agglomerate particles in the nanometer size range. Transmission electron microscopy was used to measure the volumes of agglomerate particles that were preselected by mass using an aerosol particle mass analyzer. We found that the density of diesel exhaust particles increased from 1.27 to 1.78 g/cm 3 as particle mobility size increased from 50 to 220 nm. When particles are preheated to remove volatile components, the density was 1.77 ± 0.07 g/cm 3 , independent of particle size. The densities measured after heating correspond to the inherent material density of diesel soot. Measurements with aluminum nanoparticles were made downstream of a furnace where aluminum (Al) was converted to alumina (Al2O3). From measurements of inherent material density we were able to infer the extent of reaction, which varied with furnace temperature.
285 citations