In this study, microstructural variation of hydroxyapatite (HAp) ceramics upon thermal treatment in air at different temperatures was investigated by x-ray diffraction patterns, Raman and x-ray photoelectron spectroscopies. The results revealed a significant dependence of the microstructure of nonstoichiometric HAp on temperature, because of the competition between hydroxylation and different kinds of dehydroxylation at different temperatures, and a gradual increase in material hardness with annealing temperature because of structural reconstruction. In summary, a suitable thermal treatment can effectively tailor microstructure and defect contents, as well as chemical composition and mechanical hardness of HAp ceramics.

在这项研究中，通过 X 射线衍射图、拉曼和 X 射线光电子光谱法研究了羟基磷灰石 (HAp) 陶瓷在不同温度下在空气中热处理后的微观结构变化。结果表明，由于羟基化和不同类型脱羟基在不同温度下的竞争，非化学计量的 HAp 的微观结构对温度有显着的依赖性，并且由于结构重建，材料硬度随退火温度逐渐增加。总之，合适的热处理可以有效地调整 HAp 陶瓷的微观结构和缺陷含量，以及化学成分和机械硬度。