| Calcium Phosphate Coating on Al2O3 Ceramics by a Biomimetic Method Using Electric Pulse Technique |
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| 作者姓名： | 靳正国 石勇 郭文利 王英 邱继军 |
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| 作者单位： | KeyLaboratoryforAdvancedCeramicsandMachiningTechnologyofEducationMinistry,SchoolofMaterialsScienceandTechnology,TianjinUniversity,Tianjin300072,China |
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| 摘 要： | The preparation of calcium phosphate (CP) coating on alumina ceramics using electric pulse stimulating method has been investigated. The cup-shaped alumina ceramics were soaked in a simulated body fluid ( SBF), and a square pulse potential with frequency of 1 Hz and voltage of 110 V was applied between the inner and outer surfaces of the alumina cup. Surface morphology of CP coatings during different deposition periods was observed by a Philips XL-30 scanning electron microscope (SEM). Compositional analysis was examined by EDAX. The mechanism of nucleation and growth of CP coating was discussed. SEM result indicates that the coating comprises of a large number of tiny needle-like grains and has a porous microstructure. There is a strong bond between the deposited layer and Al2O3 substrate, which may be due to the gentle growth of the biomimetic method. The EDAX analysis indicates that main composition of the coating is calcium and phosphor. The formation of CP coating may be contributed to the stimulation of electric pulse and the high ions concentration which is 1.5 times of the concentration of SBF solution ( 1.5SBF solution). Such surface functionalization method by electric pulse potential can be used to prepare CP coating on various electric-insulating bioinert materials for improving their bioactive character.
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| 关 键 词： | 磷酸钙 表面覆盖 仿生处理 电子脉冲激励 制陶技术 |
Calcium Phosphate Coating on Al2 O3 Ceramics by a Biomimetic Method Using Electric Pulse Technique |
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| Jin Zhengguo,SHI Yong,Guo Wenli,WANG Ying,QIU Jijun.Calcium Phosphate Coating on Al2O3 Ceramics by a Biomimetic Method Using Electric Pulse Technique[J].Transactions of Tianjin University,2005,11(3):190-193. |
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| Authors: | Jin Zhengguo SHI Yong Guo Wenli WANG Ying QIU Jijun |
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| Abstract: | The preparation of calcium phosphate (CP) coating on alumina ceramics using electric pulse stimulating methoe has been investigated. The cup-shaped alumina ceramics were soaked in a simulated body fluid (SBF), and a square pulse potential with frequency of 1 Hz and voltage of 110 V was applied between the inner and outer surfaces of the alumina cup. Surface morphology of CP coatings during different deposition periods was observed by a Philips XL-30 scanning electron microscope (SEM). Compositional analysis was examined by EDAX. The mechanism of nucleation and growth of CP coating was discussed. SEM result indicates that the coating comprises of a large number of tiny needle-like grains and has a porous microstructure. There is a strong bond between the deposited layer and Al_2O_3 substrate, which may be due to the gentle growth of the biomimetic method. The EDAX analysis indicates that main composition of the coating is calcium and phosphor. The formation of CP coating may be contributed to the stimulation of electric pulse and the high ions concentration which is 1.5 times of the concentration of SBF solution (1.5SBF solution). Such surface functionalization method by electric pulse potential can be used to prepare CP coating on various electric-insulating bioinert materials for improving their bioactive character. |
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| Keywords: | calcium phosphate coating biomimetic process electric pulse stimulation |
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