Thermal behavior of apatitic calcium phosphates synthesized from calcium carbonate and orthophosphoric acid or potassium dihydrogen orthophosphate
| Autor: | Ange Nzihou, Marta Galera Martinez, Patrick Sharrock, Doan Pham Minh |
|---|---|
| Přispěvatelé: | Centre de recherche d'Albi en génie des procédés des solides divisés, de l'énergie et de l'environnement (RAPSODEE), Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT) |
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Materials science
Potassium Inorganic chemistry chemistry.chemical_element 02 engineering and technology Calcium 010402 general chemistry 01 natural sciences law.invention chemistry.chemical_compound [SPI]Engineering Sciences [physics] law Specific surface area Calcium hydroxyapatite Calcination Thermal treatment Physical and Theoretical Chemistry Apatite 021001 nanoscience & nanotechnology Condensed Matter Physics Phosphate 6. Clean water 0104 chemical sciences Thermogravimetry Calcium carbonate chemistry Particle size 0210 nano-technology |
| Zdroj: | Journal of Thermal Analysis and Calorimetry Journal of Thermal Analysis and Calorimetry, Springer Verlag, 2013, 112 (3), p. 1145-1155. ⟨10.1007/s10973-012-2695-6⟩ |
| ISSN: | 1388-6150 1588-2926 |
| Popis: | International audience; The synthesis of calcium hydroxyapatite powder (Ca-HA) from orthophosphoric acid or from potassium dihydrogen orthophosphate and calcium carbonate was carried out under moderate conditions. A better dissolution of calcium carbonate and a complete precipitation of the orthophosphate species were obtained with orthophosphoric acid, indicating that it may be of interest as a phosphate source compared with potassium dihydrogen orthophosphate. The influence of calcination treatment on the physico-chemical properties of the solids is discussed in this paper. Different characterization techniques such as specific surface area (S (BET)), true density, particle size distribution, thermo-mechanical analysis, simultaneous thermogravimetry and differential scanning calorimetry analysis, X-ray diffraction and infrared were performed to understand the phase changes during thermal treatment. Specific surface area decreased while true density and particle size increased with the rise in the calcination temperature, due to the sintering of particles and the chemical reactions occurring at high temperatures. Mixtures of well-crystallized Ca-HA and tricalcium phosphate (TCP) or well-crystallized Ca-HA, CaO, and TCP were obtained after calcination at 800-1,000 A degrees C of the solid products starting from orthophosphoric acid or potassium dihydrogen orthophosphate, respectively. |
| Databáze: | OpenAIRE |
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