Solid concentration dependence of reaction rate for volume reaction model in fluid-solid reactions.

Mathematical Modeling of Fluorination Reaction of Uranium Dioxide and Evaluation of Existing Gas-Solid Reaction Models

Stress-Assisted Reaction at a Solid-Fluid Interface

On the interface between a solid and a fluid, a reaction can occur in which atoms either leave the solid to join the fluid, or leave the fluid to join the solid. If the solid is in addition subject to a mechanical load, two outcomes may be expected. The reaction may proceed uniformly, so that the interface remains flat as the solid recedes or extends. Alternatively, the reaction may cause the i...

Synthesis & Characterization of CaB4O7 Powder by Solid-State Reaction

The synthesis of calcium tetraborate was investigated in a temperature ranging from 800℃ to 900℃ using the solid-state reaction method. The synthesis was done using ammonium tetraborate tetrahydrate as the source of boron. At temperatures of 800 ℃ and 880 ℃, the mixed phases from different compounds were formed. At the optimum temperature of 840℃, the mixed phase was only composed of meta and t...

Kinetic model for solid diffusion with a competing surface reaction

where 8, is the thickness of diffusant initially plated on the surface of the specimen, D is the diffusivity, and c(x, t) is atomic fraction of the diffusant at (x, t). This expression is appropriate if the diffusion anneal is long compared to mSo2/4Dc'„ where c, is the solubility of the diffusant. "' In some systems, this condition cannot be met. For example, in the study of the diffusion of z...

Escape from the destruction of the galvanic replacement reaction for solid → hollow → solid conversion process in one pot reaction.

Based on the difference in the redox potentials between two metal species, the galvanic replacement reaction is known to create an irreversible process to generate hollow nanostructures in a wide range of shapes. In the context of galvanic replacement reaction, continuing etching leads to the general collapse of the hollow structures because of the excess amount of oxidizing agent. We demonstra...