Journal of the American Ceramic Society · 1997 · 46 citations · 14 references
Natural SciencesMaterials EngineeringMaterials ScienceMaterials ChemistryNanomaterialsNanotechnologyCrystal GrowthCrystallization ProcessesNanoparticle SynthesisNucleationParticle SizePowder ProcessingActivation EnergyCrystal Growth KineticsCrystallization KineticsGrowth KineticsOxide Growth KineticsParticle GrowthParticle Growth KineticsParticle Growth Mechanisms
The particle‐growth kinetics of sodium niobate and zirconium titanate powders that were processed by the polymeric precursors method were studied. The growth kinetics that were studied for the particle, in the final stage of crystallization, showed that the growth process occurs in two different stages. For temperatures <800°C, the particle‐growth mechanism is associated with surface diffusion, with an activation energy in the range of 40‐80 kJ/mol. For temperatures >800°C, particle growth is controlled by densification of the nanometric particle clusters and by a neck‐size‐controlled particle‐growth mechanism. The results suggest that this behavior was typical of the synthesis method, because two different polycation oxides presented the same behavior.
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On a Theory of the van der Waals Adsorption of Gases
Stephen Brunauer, Lola S. Deming, W. Edwards Deming et al. · Journal of the American Chemical Society · 1940 · 4.8K citations