摘要
磷酸钙生物陶瓷中存在阳离子置换现象 .对可吸收Ca2 NaK(PO4) 2 陶瓷、湿法合成的含锶和含镧羟基磷灰石进行X射线衍射 (XRD)分析发现 :Ca2 NaK(PO4) 2 可看作Na+ 在KCaPO4中的固溶体 ,其衍射角位于KCaPO4和NaCaPO4之间 ;含锶羟基磷灰石的衍射峰向低角度偏移 ,峰宽而弱 ,其热稳定性变差 ,分解出磷酸三钙和氧化钙 ;相同配料下含镧羟基磷灰石的衍射峰的宽化和弱化更严重 ,其热稳定性更差 .
Cation substitution exists in calcium phosphate bioceramics. X -ray diffraction(XRD) method is utilized to analyze the absorbable Ca 2NaK(PO 4) 2 ceramic, the strontium_containing and lanthanum_containing hydroxyapatite(HA)synthesized by wet method. Ca 2NaK(PO 4) 2 may be considered as a solid solution of Na + in KCaPO 4,and its diffraction angles lie between KCaPO 4 and NaCaPO 4. Strontium in HA decreases the diffraction angles, and broadens and weakens the diffraction peaks of HA. It also decreases the thermal stability of HA, which deco_mposes into tricalcium phosphate and calcium oxide. As for lanthanum_containing HA at the same addition ratio, the broadening and weakening of the diffraction peaks of hydroxyapatite are more significant, and the thermal stability is even worse.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2000年第3期273-274,共2页
Journal of The Chinese Ceramic Society
基金
教育部跨世纪人才培养计划! (96年度 )
国家自然科学基金!资助项目 (5 9872 0 2 6 )
