聚磷酸钙晶型与聚合度的调控-IngentaConnect.PDFVIP

534 2012 40 4 Vol. 40No. 4 2 0 1 2 4 JOURNAL OF THE CHINESE CERAMIC SOCIETY April 2012 ( 430070) (calcium polyphosphateCPP) CPPX – 1 000 CPP 3 γ-CPPβ-CPPα-CPP400 CPP 150 1 000 400 6 h800 2 h R318.08 A 0454–5648(2012)04–0534–08 2012–03–31 11:18:00 DOI CNKI:11-2310/TQ1118.012 /kcms/detail/11.2310.TQ1118.012.html Effect of Processing on Crystaline Forms and Polymerization Degree of Calcium Polyphosphate WU JianfengLI Yonghua XU Xiaohong ZHANG YaxiangLAO Xinbin LI Kun (School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China) Abstract: Calcium polyphosphate (CPP), which has outstanding bioactivity, controllable degradability and proper mechanical prop- erty, is a novel material for bone repair. CPP of different crystal forms and polymerization degrees were synthesized by heat treatment using calcium biphosphate as starting material, effects of heat treatment on phase transformation and polymerization degree were also discussed. The effect of the composition, properties and microstructure of CPP were studied by X-ray diffraction, thermogravimet- ric–differential scanning calorimeter, scanning electron microscopy and nuclear magnetic resonance. The results reveal that there were three types of CPP between RT–1 000 , which were γ-CPP, β-CPP and α-CPP. Polymerization degree depended on the heat holding time at 400 , the polymerization reaction of CPP hadn’t stopped until it formed amorphous phase and melting into glass from 150 to 1 000 . The best sample was obtained by being heated at 400 for 6 h and then heated a