We conducted uniaxial compression and grain growth experiments on fine-grained forsterite (Mg2SiO4) + 10 vol% periclase (MgO) aggregates. This aggregate is a unique polymineralic system in which all of the constituent elements secondary phase constitute primary mineral phase, except for Si, slowest diffusing species phase. Grain aggregates, where presence results boundary pinning proceeds via O...

In this paper, an analytical method of solving the integro-differential system kinetic and balance equations describing evolution ensemble crystals during intermediate phase bulk crystallization process is described. The theory developed for first- second order corresponding to absence presence fluctuations in particle growth rates. crystal-size distribution function as well dynamics metastabil...

Single crystalline anatase TiO2 microspheres with co-exposed {001}/{101} facets were prepared by a facile one-pot hydrothermal method using NaF as morphology controlling agent. The influences of the amount on and also photocatalytic activity investigated systematically. obtained possessed better when concentration was chosen at 0.1 mol/L, experimental results indicated that crystal structure pl...

Ostwald ripening refers to a process of particle/droplet/bubble system under thermal equilibrium state adjusting the size distribution spontaneously reduce total surface energy. With knowing lack in numerical studies, lattice Boltzmann approach is used simulate two dimensional vapour bubble cluster dominated by phase transition kinetics. By comparing results with theoretical prediction derived ...

Ostwald ripening has been broadly studied because it plays a determinant role in the evolution of cluster size during both chemical and physical synthesis of nanoparticles. This thermoactivated process causes large particles to grow, drawing material from the smaller particles, which shrink. However, this phenomenon becomes more complex when considering the coarsening of metallic alloy clusters...

Self-assembled InAs quantum dots (QDs) grown on GaAs(001) by molecular beam epitaxy under continuous and growth-interruption modes exhibit two families of QDs, quasi-three-dimensional (quasi-3D; Q3D) and three-dimensional (3D) QDs, whose volume density evolution is quantitatively described by a classical rate-equation kinetic model. The volume density of small Q3D QDs decreases exponentially wi...

We examined the stability of emulsions of oil in several nonaqueous polar liquids using commercially available nonionic surfactants. Stable nonaqueous emulsions were only obtained with formamide and dimethylsulfoxide. Hydrogen bonding, and not polarity, appears to be the important factor determining the emulsifying power of a solvent. Ostwald ripening plays a much more important role in the sta...

The influence of vacancy preference towards one of the constituents in a binary system on the formation of precipitates was investigated by atomistic and continuums modeling techniques. In case of vacancy preference towards the solute atoms, we find that the mobility of individual clusters as well as entire atom clusters is significantly altered compared to the case of vacancy preference toward...

Uniform and single-crystalline Mn(3)O(4) nano-octahedrons have been successfully synthesized by a simple ethylenediaminetetraacetic acid disodium salt (EDTA-2Na) assisted hydrothermal route. The octahedron structures exhibit a high geometric symmetry with smooth surfaces and the mean side length of square base of octahedrons is ∼160 nm. The structure is reckoned to provide superior functional p...

Magnetic nanoparticles based on Fe3O4 were prepared by a facile and rapid one-pot solvothermal synthesis using FeCl3·6H2O as a source of iron ions, ethylene glycol as a solvent and NH4Ac, (NH4)2CO3, NH4HCO3 or aqueous NH3 as precipitating and nucleating agents. In contrast to previous reports we reduce the synthesis time to 30 minutes using a pressurized microwave reactor without the requiremen...