caa a22 4500 463233395 CHVBK 20180405153249.0 cr unu---uuuuu 170326e20070701xx s 000 0 eng 10.1007/s10853-006-0613-7 doi (NATIONALLICENCE)springer-10.1007/s10853-006-0613-7 Preparation of hydroxyapatite ceramics by hydrothermal hot-pressing method at 300°C [Elektronische Daten] [Junguo Li, Toshiyuki Hashida] Hydroxyapatite (HA) ceramics were prepared by a hydrothermal hot-pressing (HHP) method at a low temperature (300°C). DCPD (CaHPO4·2H2O)+Ca(OH)2, OCP (Ca8H2(PO4)6·5H2O)+Ca(OH)2, DCPD+NH3·H2O, OCP+NH3·H2O or α-TCP (Ca3(PO4)2)+NH3·H2O were used as the precursors. The mixture was treated by HHP under a condition of 300°C/40MPa. In sample DCPD+Ca(OH)2 and OCP+Ca(OH)2, the HA ceramics obtained showed a porous and homogenous microstructure, and the bending strength were 9.9MPa and 10.9MPa, respectively. In sample α-TCP+NH3·H2O, rod-like HA crystals produced. When the starting materials were DCPD+NH3·H2O, OCP+NH3·H2O, the HA particles produced exhibited plate-like features. It appeared that the plate-like HA particles stacked into a lamellar structure. The formation of the lamellar structure leads to a noticeable improvement in fracture property of the HA ceramic. The bending strength and the fracture toughness of the sample prepared from OCP and ammonia water reach 90MPa and 2.3MPam1/2, respectively. Springer Science+Business Media, LLC, 2007 Li Junguo Fracture and Reliability Research Institute, Graduate School of Engineering, Tohoku University, 980-8579, Sendai, Japan aut Hashida Toshiyuki Fracture and Reliability Research Institute, Graduate School of Engineering, Tohoku University, 980-8579, Sendai, Japan aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/13(2007-07-01), 5013-5019 0022-2461 42:13<5013 2007 42 10853 https://doi.org/10.1007/s10853-006-0613-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-0613-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Li Junguo Fracture and Reliability Research Institute, Graduate School of Engineering, Tohoku University, 980-8579, Sendai, Japan aut NATIONALLICENCE 700 1- Hashida Toshiyuki Fracture and Reliability Research Institute, Graduate School of Engineering, Tohoku University, 980-8579, Sendai, Japan aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/13(2007-07-01), 5013-5019 0022-2461 42:13<5013 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer