Calculating the conversion of a diffusion controlled solid-solid reaction.
نویسندگان
چکیده
منابع مشابه
Solid-state dimer method for calculating solid-solid phase transitions.
The dimer method is a minimum mode following algorithm for finding saddle points on a potential energy surface of atomic systems. Here, the dimer method is extended to include the cell degrees of freedom for periodic solid-state systems. Using this method, reaction pathways of solid-solid phase transitions can be determined without having to specify the final state structure or reaction mechani...
متن کاملEscape 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...
متن کاملKinetic 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...
متن کاملTravelling Waves for Solid-gas Reaction-diffusion Systems
We study a two-species reaction-diffusion problem described by a system consisting of a semilinear parabolic equation and a first order ordinary differential equation, endowed with suitable conditions. We prove the existing of a unique traveling wave profile and give necessary conditions and sufficient conditions for the occurrence of penetration and conversion fronts.
متن کاملApplication of SBA-Pr-SO3H as a solid acid nanoreactor in the Biginelli reaction
Sulfonic acid functionalized nanoporous silica (SBA-Pr-SO3H) with a pore size of 6 nm catalyzed three component coupling of aromatic aldehydes, urea and ethyl acetoacetate to afford the corresponding dihydropyrimidinones under solvent free condition. This new protocol for Biginelli reaction has important advantages such as green synthesis, short reaction time, easy isolation and high yields of ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of the Society of Powder Technology, Japan
سال: 1985
ISSN: 0386-6157,1883-7239
DOI: 10.4164/sptj.22.688