摘要
通过熔融法制备组成为Na2O-MgO-CaO-P2O5的基础玻璃,在800℃进行热处理,得到主要组成为Na4P2O7和β-Ca2P2O7(β-calcium pyrophosphate,β-DCP)的焦磷酸盐微晶玻璃(pyrophosphate glass,PG)。将PG和β-磷酸三钙(β-tricalcium phosphate,β-TCP)按质量比为10:90混合,干压成型,烧结制得PG/β-TCP生物陶瓷。采用差热分析、X射线衍射、扫描电镜、能谱、模拟体液浸泡等方法研究了基础玻璃的析晶、PG/β-TCP生物陶瓷材料体系的相组成、力学性能和生物活性。结果表明:PG能有效提高PG/β-TCP陶瓷的抗弯强度,1 300℃烧结3 h制备的PG/β-TCP陶瓷的弯曲强度与纯β-TCP陶瓷相比,由87.4 MPa提高至113.2 MPa;同时,PG可有效改善β-TCP基体的生物活性,在模拟体液中浸泡14 d后,PG/β-TCP陶瓷表面形成Ca与P摩尔比为1.46的叶状磷灰石。
Crystal pyrophosphate glass-ceramic(PG) consisting of Na4P2O7 and β-Ca2P2O7(β-DCP) was prepared by quenching CaO-P2O5 based glass with a composition of 62P2O5-14CaO-18Na2O-6MgO in air at room temperature,followed by heat treatment at 800 ℃.The PG/ beta-tricalcium phosphate(β-TCP) ceramic was fabricated by dry pressing and subsequent sintering of the mixture of PG and β-TCP powders with a mass ratio of 10:90.The crystal composition,mechanical property and bioactivity of the PG/β-TCP material and the crystall...
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2008年第5期708-712,共5页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金(50772072)
天津市自然基金(06YFJMJC02900)
上海市青年科技启明星计划(07QA14069)资助项目
关键词
焦磷酸盐玻璃
Β-磷酸三钙
力学性能
生物活性
pyrophosphate glass
β-tricalcium phosphate
mechanical properties
biological property
