Azran Y M R, Idris B, Rusnah M, Rohaida C H
Malaysian Institute for Nuclear Technology Research (MINT), Bangi 43000 Kajang, Selangor.
Med J Malaysia. 2004 May;59 Suppl B:79-80.
The paper presents the effect of sintering temperature on the physical properties of porous hydroxyapatite (HAp In this study, the HAp was prepared using polymeric sponge techniques with different binder concentrations. The sintering process was carried out in air for temperature ranging from 1200 degrees C to 1600 degrees C. Different physical properties namely density and porosity were observed at different sintering temperatures. The HAp prepared with higher PVP binder showed a slightly decreased in apparent density with increasing sintering temperature, while those HAp prepared with lower PVP showed a slightly increase in apparent density with increasing sintering temperature. The total porosity was found to be approximately constant in the whole sintering temperature range. However, closed porosity decreases with increasing sintering temperature for HAp prepared by lower binder concentration. On the other hand, the HAp prepared by higher binder concentrations showed increasing closed porosity with increasing sintering temperature. Other features such as the influence of sintering temperatures on grain and strut would also be presented in this paper.
本文介绍了烧结温度对多孔羟基磷灰石（HAp）物理性能的影响。在本研究中，采用不同粘结剂浓度的聚合物海绵技术制备了HAp。烧结过程在空气中进行，温度范围为1200℃至1600℃。在不同烧结温度下观察到了不同的物理性能，即密度和孔隙率。用较高聚乙烯吡咯烷酮（PVP）粘结剂制备的HAp表观密度随烧结温度升高略有下降，而用较低PVP制备的HAp表观密度随烧结温度升高略有增加。发现在整个烧结温度范围内总孔隙率大致恒定。然而，对于较低粘结剂浓度制备的HAp，封闭孔隙率随烧结温度升高而降低。另一方面，较高粘结剂浓度制备的HAp封闭孔隙率随烧结温度升高而增加。本文还将介绍烧结温度对晶粒和支柱的影响等其他特征。
