Carbonate loss from two magnesium-substituted carbonated apatites prepared by different synthesis techniques
- Institute for Physical Chemistry of Ceramics, Russian Academy of Sciences, Ozernaya 48, Moscow 119361 (Russian Federation)
- CNR Istituto per lo Studio dei Materiali Nanostrutturati, P-le Aldo Moro 5, 00185 Rome (Italy)
- Universita di Roma 'La Sapienza', P-le Aldo Moro 5, 00185 Rome (Italy)
This study was aimed at the investigation of the thermal stability of Mg-substituted carbonated apatites over the wide temperature range. Two different apatites were studied, which were prepared by either precipitation from aqueous solution or by solid-liquid interaction. The following methods were employed: FTIR spectroscopy of the condensed gas phase to evaluate the CO and CO{sub 2} release with increasing temperature, FTIR of the solid residue after heating, XRD analysis, thermogravimetry and scanning electron microscopy. Decomposition behavior was shown to depend significantly on the synthesis method. Wet-synthesized powders are significantly less thermally stable compared with those prepared by solid-liquid interaction. Intensive release of carbon oxides from the former was observed at 300 deg. C, whereas the latter powder was relatively stable up to temperature about 1000 deg. C.
- OSTI ID:
- 20891635
- Journal Information:
- Materials Research Bulletin, Vol. 41, Issue 3; Other Information: DOI: 10.1016/j.materresbull.2005.09.017; PII: S0025-5408(05)00354-5; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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