Crystallinity and fluorine substitution effects on the proton conductivity of porous hydroxyapatites
| Autor: | L. El Hammari, A. Laghzizil, Khalid Lahlil, Philippe Barboux, A. Saoiabi |
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| Rok vydání: | 2004 |
| Předmět: |
Materials science
chemistry.chemical_element Mineralogy Conductivity Condensed Matter Physics Electronic Optical and Magnetic Materials law.invention Inorganic Chemistry Crystallinity Adsorption chemistry Chemical engineering law Specific surface area Materials Chemistry Ceramics and Composites Fluorine Relative humidity Physical and Theoretical Chemistry Crystallization Porous medium |
| Zdroj: | Journal of Solid State Chemistry. 177:134-138 |
| ISSN: | 0022-4596 |
| DOI: | 10.1016/s0022-4596(03)00356-6 |
| Popis: | Porous calcium hydroxyapatite (p-HAp) was prepared by wet chemical methods. The poorly crystalline structure and the high surface specific area (235 m 2 /g) of this hydroxyapatite have effects on the variation of the electrical properties. Good linearity of logarithm of conductivity versus the relative humidity in the range from 19% to 88% (RH) was observed using the complex impedance spectroscopy. The proton conduction was affected by the relative humidity related to H 2 O adsorption on the material surfaces. The fluorine substitution in p-HAp also modifies the crystalline and the proton conduction properties. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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