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Author(s): |
Bin Liu, Namjing University of Information & Technology, Nanjing 210044, China;
Yin-sheng Dong, School of Materials Science and Engineering, Southeast University, Nanjing 211196, China;
Yi-jun Yao, Namjing University of Information & Technology, Nanjing 210044, China;
Ping-hua Lin, Huazhong University of Science & Technology, Wuhan, 430074, China |
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Abstract: |
the calcium phosphate porous ceramics were frabricated by the foam impregnation technology with Al2O3-MgO-P2O5 addition. It found that Al2O3-MgO-P2O5 phosphate not only promoted sintering of ceramics, but also improved performance of ceramic slurry. The SEM results indicated that the obtained ceramics have connective, uniform macro-porous structures with100~500μm diameter, micro-porous structures with approximately 3μm diameter, and the average porosity of 85.9%±1.6%. These characteristics are in favor of tissues growing and materials degenerating. The mechanical testing results indicated that the average compressive strength of porous ceramics was 1.04MPa±0.15MPa, allowing one to easily handle these systems with no damage. The XRD results indicated that under the Al2O3-MgO-P2O5 phosphate reacted with HA at high temperature, in fact, the sintered porous ceramics composed of HA, β-Ca 2P2O7, few Mg3(PO4)2 and Al(PO3)3. However, these polyphosphates may still have favorable biological performance.
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