Barinov S M, Rau J V, Cesaro S Nunziante, Durisin J, Fadeeva I V, Ferro D, Medvecky L, Trionfetti G
Instutute for Physical Chemistry of Ceramics, Russian Academy of Sciences, Ozernaya 48, 119361, Moscow, Russia.
J Mater Sci Mater Med. 2006 Jul;17(7):597-604. doi: 10.1007/s10856-006-9221-y.
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 degrees Celsius releasing mainly carbon dioxide, but retained some carbonate groups and apatite structure at the temperature 1100 degrees Celsius useful to prepare porous carbonate-apatite ceramics intended for bone tissue engineering scaffolds.
合成碳酸磷灰石陶瓷被认为是用于骨替代的自体移植和同种异体移植材料的有前途的替代品。本研究的目的是研究AB型碳酸磷灰石在宽温度范围内的热稳定性。热稳定性数据必须能够控制陶瓷的烧结条件。通过氧化钙与磷酸氢铵在碳酸铵存在下的相互作用制备初始碳酸磷灰石粉末。通过红外光谱、固体失重和X射线衍射以及平衡条件下样品热分解产生的冷凝气相的红外分析来监测分解过程。揭示了一氧化碳和二氧化碳释放的特征。合成的AB型碳酸磷灰石在约400摄氏度开始分解，主要释放二氧化碳，但在1100摄氏度时保留了一些碳酸根基团和磷灰石结构，这对于制备用于骨组织工程支架的多孔碳酸磷灰石陶瓷很有用。
