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Título

Structural stability of a colloidal solution of Ca(OH)2 nanocrystals exposed to high relative humidity conditions

Autor Gómez Villalba, Luz Stella; López-Arce, Paula ; Álvarez de Buergo, Mónica ; Fort González, Rafael
Palabras clave Saed pattern
Ring pattern
Amorphous form
Lattice contraction
Zone axis
Cultural heritage
Calcium hydroxide
Lattice parameter
CaCO3 polymorph
Phase transformation
Aragonite crystal
Particle size growth
Calcite phase
Electron diffraction
Fecha de publicación 25-may-2011
EditorSpringer
Citación Applied Physics A, 104: 1249- 1254 (2011)
ResumenThe effect of high relative humidity (90% and 75% RH) on phase transformation and stability of CaCO3 polymorphs has been studied based on the structural and morphological changes from a colloidal solution based on Ca(OH)2 nanocrystals. Carbonation process has been confirmed indicating differences in nucleation and stability of CaCO3 polymorphs as a function of RH. Local fluctuations in the water/alcohol ratio significantly affect the precipitation/dissolution of anhydrous and hydrated polymorphs that are reflected in the particle size. Changes in lattice parameters and particle size are related to surface tension fluctuations, release of residual water and time of exposure. These results highly contribute to evaluate the stability of the Ca(OH)2 nanoparticles in high humidity conditions.
URI http://hdl.handle.net/10261/115833
DOI10.1007/s00339-011-6457-2
Identificadoresdoi: 10.1007/s00339-011-6457-2
issn: 0947-8396
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