摘要
用化学沉淀法合成了不同钙/磷摩尔比并含碳酸根的部分结晶磷酸钙(partially crystallized calcium phosphates, PCCP),用 PCCP 和无水磷酸氢钙(dicalcium phosphate anhydrous, DCPA)配制了 PCCP+DCPA 体系磷酸钙骨水泥,用去离子水作为骨水泥的固化液。通过相组成的 X 射线衍射分析、扫描电子显微镜观察、孔隙率和抗压强度测定,研究了钙磷摩尔比[n(Ca)/n(P)]对 PCCP+DCPA 磷酸钙骨水泥性能的影响。结果表明:随着部分结晶磷酸钙中 n(Ca)/n(P)的提高,磷酸钙骨水泥试件的抗压强度明显下降,但磷酸钙骨水泥水化产物羟基磷灰石的结晶度提高,固化体中大于 100 nm 的孔隙增多、固化体的孔隙率增大,可见,n(Ca)/n(P)对磷酸钙骨水泥的性能有重要影响,在制备磷酸钙骨水泥时应选择适当的 n(Ca)/n(P)。
Partially crystallized calcium phosphates （PCCP） with different calcium to phosphate molar ratios （n（Ca）/n（P）, the same below） and containing carbonate were synthesized by chemical precipitation method. A novel calcium phosphate cement was prepared by PCCP and dicalcium phosphate anhydrous （DCPA）. The effects of n（Ca）/n（P） ratio on the properties of the PCCP-DCPA cement system were studied by X-ray diffraction, scanning electron microscope, porosity measurement, and compressive strength analysis. The results show that with the increase of n（Ca）/n（P） ratio, the compressive strength of the cement samples decreased significantly, whereas the crystallinity, porosity and pore fractions larger than 100nm in the hydrated cement increased. The properties of the cement were greatly influenced by the n（Ca）/n（P） ratio. The n（Ca）/n（P） ratio must be carefully considered in the preparation of calcium phosphate cement.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2007年第12期1582-1586,共5页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金(50772037)
广东省自然科学基金(011561)资助项目。
关键词
骨水泥
磷酸钙
孔隙率
结晶程度
抗压强度
bone cement
calcium phosphate
porosity
crystallinity
compressive strength
