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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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Chaudhuri, Julian
University of Plymouth
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (6/6 displayed)
- 2017Bioprocess Design for Large-Scale Organoid Expansion
- 2017Zirconium amine tris(phenolate):A more effective initiator for biomedical lactidecitations
- 2017Zirconium amine tris(phenolate)citations
- 2011The relationship between poly(lactide-co-glycolide) monomer ratio, molecular weight and hollow fibre membrane scaffold morphologycitations
- 2009Electrical characterization of hydroxyapatite-based bioceramicscitations
- 2009Influence of porosity on polarisation and electrical properties of hydroxyapatite based ceramicscitations
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article
Electrical characterization of hydroxyapatite-based bioceramics
Abstract
This paper studies the AC conductivity and permittivity of hydroxyapatite (HA)-based ceramics from 0.1 Hz-1 MHz at temperatures from room temperature to 1000 degrees C. HA-based ceramics were prepared either as dense ceramics or in porous form with interconnected porosity and were sintered in either air or water vapour. Samples were thermally cycled to examine the influence of water desorption on AC conductivity and permittivity. Surface-bound water was thought to contribute to conductivity for both dense and porous materials at temperatures below 200 degrees C. At temperatures below 700 degrees C the permittivity and AC conductivity of HA was also influenced by the degree of dehydration and thermal history. At higher temperatures (700-1000 degrees C), bulk ionic conduction was dominant and activation energies were of the order of similar to 2 cV, indicating that hydroxyl ions are responsible for conductivity.