Carbonate release from carbonated hydroxyapatite in the wide temperature rage |
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Authors: | S M Barinov J V Rau S Nunziante Cesaro J Ďurišin I V Fadeeva D Ferro L Medvecky G Trionfetti |
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Affiliation: | (1) Instutute for Physical Chemistry of Ceramics, Russian Academy of Sciences, Ozernaya 48, 119361 Moscow, Russia;(2) CNR Istituto per lo Studio dei Materiali Nonostrutturati, P-le Aldo Moro 7, 00185 Roma, Italy;(3) Department of Chemistry, Lomonosov Moscow State University, 119899 Moscow, Russia;(4) Institute for Materials Research, Slovak Academy of Sciences, Watsonova 47, 043 53 Košice, Slovakia;(5) Universita’ di Roma “La Sapienza”, P-le Aldo Moro 7, 00185 Roma, Italy |
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Abstract: | Synthetic carbonated apatite ceramics are considered as promising alternative to auto- and allograft materials for bone substitute.
The aim of this study was to investigate the thermal stability of an AB-type carbonated apatite in the wide temperature range.
The data on the thermal stability have to allow the conditions of the sintering of the ceramics to be controlled. Initial
carbonated apatite powders were prepared by interaction between calcium oxide and ammonium hydrogen phosphate with addition
of ammonium carbonate. Decomposition process was monitored by infra red spectroscopy, weight loss and X-ray diffraction of
solid, and by infra red analysis of condensed gas phase resulted from the thermal decomposition of the sample in equilibrium
conditions. Features of carbon monoxide and carbon dioxide release were revealed. The synthesized AB-type carbonated apatite
is started to decompose at about 400°C releasing mainly carbon dioxide, but retained some carbonate groups and apatite structure
at the temperature 1100°C useful to prepare porous carbonate-apatite ceramics intended for bone tissue engineering scaffolds. |
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