Effect of Additives on the Morphology of the Hydrated Product and Physical Properties of a Calcium Phosphate Cement

The morphology of a hydrated calcium phosphate cement （CPC） doped with several normally used additives was investigated by scanning electron microscopy （SEM） and the compressive strength of the cement was determined in this study. The hydrated products of CPC without additives was rod-like hydroxyapatite （HA） grains with around 2-5 μm in length and 100 nm in width. The addition of Sr obviously decreased the crystal size of the rod-like grains. CPCs containing carbonate, collagen and gelatin showed flake-like crystal morphology. Crylic acid-containing CPC presented flocculus-like structure. And malic acid-containing CPC exhibited oriented flake-like structure. The X-ray diffraction （XRD） analysis showed that the additives used in this study did not alter the hydration products of the cement. The compressive strength tests indicated that the compressive strength of the cement with rod-like morphology HA crystals was much higher than that of the cement with flake-like morphology HA crystals, and the cement with oriented flake-like morphology HA crystals exhibited the poorest compressive strength.

与几通常使用的添加剂做的含水的磷酸钙水泥(CPC ) 的形态学被扫描电子显微镜学(SEM ) 调查，水泥的压缩强度在这研究是坚定的。没有添加剂的 CPC 的含水的产品是像杆的 hydroxyapatite (哈) 谷物与在在长度的 2-5 亩 m 和在宽度的 100 nm 附近。Sr 的增加显然减少了包含碳酸盐，骨胶原和明胶的像杆的 grains.CPCs 的晶体大小显示出像薄片的水晶 morphology.Crylic 酸包含的 CPC 介绍像绒球的结构。并且苹果酸酸包含的 CPC 展出了面向的像薄片的结构。X 光检查衍射(XRD ) 分析证明在这研究使用的添加剂没改变水泥的水和产品。压缩强度测试显示有像杆的形态学的水泥的压缩强度哈晶体比有像薄片的形态学的水泥的高得多哈有面向的像薄片的形态学的晶体，和水泥哈晶体展出了最差的压缩强度。