TY - GEN
T1 - Densification process of OH controlled hydroxyapatite ceramics by spark plasma sintering
AU - Kawagoe, D.
AU - Koga, Y.
AU - Ishida, E. H.
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). In order to reveal the ideal sintering conditions for preparation of transparent ceramics, densification process on SPS was investigated. The samples were pressed uniaxialy under 60 MPa, and then they were heated by SPS at 800 °C, 900 °C and 1000 °C for 10 min with the heating rate of 25 °Cmin-1. 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. In analysis of the densification behavior during sintering of HA by SPS, dominant sintering mechanism was plastic flow of densification. Transparent ceramics should be the most suitable materials to investigate the interface between human cells and ceramics.
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). In order to reveal the ideal sintering conditions for preparation of transparent ceramics, densification process on SPS was investigated. The samples were pressed uniaxialy under 60 MPa, and then they were heated by SPS at 800 °C, 900 °C and 1000 °C for 10 min with the heating rate of 25 °Cmin-1. 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. In analysis of the densification behavior during sintering of HA by SPS, dominant sintering mechanism was plastic flow of densification. Transparent ceramics should be the most suitable materials to investigate the interface between human cells and ceramics.
KW - Hydroxyapatite
KW - Spark plasma sintering and plastic flow
KW - Transparent ceramics
UR - http://www.scopus.com/inward/record.url?scp=33845587720&partnerID=8YFLogxK
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U2 - 10.1063/1.2207069
DO - 10.1063/1.2207069
M3 - Conference contribution
AN - SCOPUS:33845587720
SN - 0735403279
SN - 9780735403277
T3 - AIP Conference Proceedings
SP - 39
EP - 42
BT - WATER DYNAMICS
T2 - WATER DYANMICS: 3rd International Workshop on Water Dynamics
Y2 - 16 November 2005 through 17 November 2005
ER -