Gelcasting of through-pore hydroxyapatite ceramics |
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| Affiliation: | 1. Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an, 710049, China;2. Faculty of Materials and Energy, Southwest University, Chongqing, 400715, China;1. LSFC Laboratoire de Synthèse et Fonctionnalisation des Céramiques, UMR 3080, CNRS/Saint-Gobain CREE, 550 Av. Alphonse Jauffret, 84306 Cavaillon Cedex, France;2. Institute of Ceramics and Glass (ICV-CSIC), Kelsen 5, 28049 Madrid, Spain;1. Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China;2. Key Laboratory of Advanced Structural-Functional Integration Materials & Green Manufacturing Technology, Harbin Institute of Technology, Harbin, 150001, China;3. School of Materials Science and Engineering, Harbin Institute of Technology, Weihai, 264209, China;4. China Petroleum Engineering Co., Ltd., Beijing, 100007, China;1. School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, PR China;2. Key Lab of Functional Materials for Electronic Information (B), Ministry of Education, Wuhan, 430074, PR China;3. State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, PR China;1. TU Bergakademie Freiberg, Institute for Mechanics and Fluid Dynamics, 09596 Freiberg, Germany;2. TU Bergakademie Freiberg, Institute of Materials Engineering, 09596 Freiberg, Germany;3. TU Bergakademie Freiberg, Institute of Ceramic, Glass and Construction Materials, 09596 Freiberg, Germany |
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| Abstract: | Although the near-net-shape forming ability of gelcasting has been well demonstrated, current attention mainly was focused on manufacturing compact ceramics. In this work we demonstrated that the combination of the gelcasting technique and the ceramic sintering process could prepare the near-net-shape through-pore hydroxyapatite (HAP) ceramics, in which the pore diameter at the range of < 2 μm could be adjusted by changing the content of HAP in green bodies and with the aid of alcohol immersion. Experiments demonstrated that the gels in green bodies and alcohol immersion played important roles in improving the strength of green bodies and decreasing the shrinkage and deformation of green bodies, and thus improving the through-pore and near-net-shape forming of HAP ceramics. Such method reported here possibly extends the gelcasting technique to manufacture other through-pore ceramics for precise filtration, protein separation, or high performance liquid chromatography. |
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| Keywords: | Gelcasting Hydroxyapatite ceramics Through-pores Near-net-shape |
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