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Growth of hydroxyapatite in a biocompatible mesoporous ordered silica

Autor: Diaz, A., Lopez, T., Manjarrez, J., Basaldella, E., Martinez-Blanes, J. M., Odriozola, J. A.

A novel biomaterial (HA,SBA15) has been developed based on the growth of calcium phosphate hydroxyapatite (HA) nanoparticles within an organized silica structure (SBA15)

Externí odkaz: http://arxiv.org/abs/2401.15937

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Copper alloys deterioration due to anthropogenic action

Autor: Duran, A., Pérez-Rodríguez, J. L., Herrera, L. K., Jiménez-de-Haro, M. C., Robador, M. D., Justo, A., Blanes, J. M., Pérez-Ferrer, J. C.

Results are presented from several samples taken from leaves of the Pardon Portico of Mosque-Cathedral of Cordoba, where an alteration on their surface was detected. Metal samples analyzed using X-ray microanalysis and powder x-ray diffraction were p

Externí odkaz: http://arxiv.org/abs/2401.16538

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Effects of mechanical treatment and exchanged cation on the microporosity of vermiculite

Autor: De Haro, M. C. Jimenez, Blanes, J. M. Martınez, Poyato, J., Perez-Maqueda, L. A., Lerf, A., Perez-Rodrıguez, J. L.

The influence of the interlayer cations, sonication and grinding on surface area of the vermiculite from Santa Olalla has been studied. For untreated samples the surface area increases with the size of the exchanged cation and only the samples with t

Externí odkaz: http://arxiv.org/abs/2401.14274

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Phase transformation on heating of an aged cement paste

Autor: Stepkowska, E. T., Blanes, J. M., Franco, F., Real, C., Perez-Rodrıguez, J. L.

The standard cement paste (C-43-St) was studied previously by static heating, SH, immediately after 1 month hydration at w/c = 0.4 [J. Therm. Anal. Calorim. 69 (2002) 187]. This paste after 5-year ageing (unprotected from contact with air) was subjec

Externí odkaz: http://arxiv.org/abs/2401.14002

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Calcite, vaterite and aragonite forming on cement hydration from liquid and gaseous phase

Autor: Stepkowska, E. T., Rodríguez, J. L. Pérez, Sayagués, M. J., Blanes, J. M. Martínez

Cement hydration products were studied as influenced by the hydration conditions (hydration time in liquid phase; relative humidity, RH, in gaseous phase). The formation of calcium hydroxide (portlandite, P) and its transformation to calcium carbonat

Externí odkaz: http://arxiv.org/abs/2401.11950

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