Physics – Chemical Physics
Scientific paper
2010-06-18
Proc. R. Soc. A 467, 1408--1426 (2011)
Physics
Chemical Physics
22 pages, 7 figures
Scientific paper
10.1098/rspa.2010.0469
Solvent-mediated solid-solid phase transformations often result in the formation of a porous medium, which may be stable on long time scales or undergo ripening and consolidation. We have studied replace- ment processes in the KBr-KCl-H2O system using both in situ and ex situ experiments. The replacement of a KBr crystal by a K(Br,Cl) solid solution in the presence of an aqueous solution is facilitated by the gen- eration of a surprisingly stable, highly anisotropic and connected pore structure that pervades the product phase. This pore structure ensures efficient solute transport from the bulk solution to the reacting KBr and K(Br,Cl) surfaces. The compositional profile of the K(Br,Cl) solid solu- tion exhibits striking discontinuities across disc-like cavities in the product phase. Similar transformation mechanisms are probably important in con- trolling phase transformation processes and rates in a variety of natural and man-made systems.
Dysthe Dag Kristian
Jamtveit Bjørn
John Timm
Meakin Paul
Raufaste Christophe
No associations
LandOfFree
The mechanism of porosity formation during solvent-mediated phase transformations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The mechanism of porosity formation during solvent-mediated phase transformations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The mechanism of porosity formation during solvent-mediated phase transformations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-260400