TY - GEN
T1 - Effect of hydrothermal treatment on sinterability of hydroxyapatite
AU - Kawagoe, D.
AU - Fujimori, H.
AU - Goto, S.
AU - Yamasaki, N.
AU - Ioku, K.
PY - 2006/5/15
Y1 - 2006/5/15
N2 - Calcium hydroxyapatite, Ca10(PO4)6(OH) 2:HA, is the inorganic principle component of natural bones and teeth. It has been already suggested that the amount of OH ion in the crystal structure of HA is closely related to the biocompatibility. The amount of OH ion in current HA, however, has not been controlled. In order to prepare more functional HA ceramics, the amount of OH ion must be controlled. In this study, HA ceramics with different OH amount were prepared from fine HA crystals by spark plasma sintering (SPS). Fine powder of HA was treated hydrothermally at 200 °C for 24 h with pH 10 NH3 aqueous solution. The samples were pressed uniaxialy under 60 MPa, and then they were SPS at 800 °C, 900 °C and 1000 °C for 10 min with the heating rate of 25 °Cmin -1. No phases other than HA were revealed by XRD for the starting samples after hydrothermal treatment and samples after sintering by SPS at 800 °C, 900 °C and 1000 °C for 10 min. The quantity of OH ion in HA ceramics sintered by SPS was decreased with increasing temperature of sintering. Transparent HA ceramics were prepared by SPS at 900 °C and 1000 °C.
AB - Calcium hydroxyapatite, Ca10(PO4)6(OH) 2:HA, is the inorganic principle component of natural bones and teeth. It has been already suggested that the amount of OH ion in the crystal structure of HA is closely related to the biocompatibility. The amount of OH ion in current HA, however, has not been controlled. In order to prepare more functional HA ceramics, the amount of OH ion must be controlled. In this study, HA ceramics with different OH amount were prepared from fine HA crystals by spark plasma sintering (SPS). Fine powder of HA was treated hydrothermally at 200 °C for 24 h with pH 10 NH3 aqueous solution. The samples were pressed uniaxialy under 60 MPa, and then they were SPS at 800 °C, 900 °C and 1000 °C for 10 min with the heating rate of 25 °Cmin -1. No phases other than HA were revealed by XRD for the starting samples after hydrothermal treatment and samples after sintering by SPS at 800 °C, 900 °C and 1000 °C for 10 min. The quantity of OH ion in HA ceramics sintered by SPS was decreased with increasing temperature of sintering. Transparent HA ceramics were prepared by SPS at 900 °C and 1000 °C.
KW - Hydroxyapatite
KW - Spark plasma sintering and Hydrothermal
KW - Transparent ceramics
UR - http://www.scopus.com/inward/record.url?scp=33845565048&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33845565048&partnerID=8YFLogxK
U2 - 10.1063/1.2207086
DO - 10.1063/1.2207086
M3 - Conference contribution
AN - SCOPUS:33845565048
SN - 0735403279
SN - 9780735403277
T3 - AIP Conference Proceedings
SP - 108
EP - 111
BT - WATER DYNAMICS
T2 - WATER DYANMICS: 3rd International Workshop on Water Dynamics
Y2 - 16 November 2005 through 17 November 2005
ER -