EFFECT OF HYDROTHERMAL TREATMENT ON PREPARATION OF TRANSPARENT APATITE CERAMICS BY SPARK PLASMA SINTERING
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Calcium hydroxyapatite, Ca<SUB>10</SUB>(PO<SUB>4</SUB>)<SUB>6</SUB>(OH)<SUB>2</SUB>: HA, is the inorganic principle component of natural bones and teeth, The present study deals with the preparation of HA ceramics with a different OH amount by spark plasma sintering (SPS) from HA fine crystals synthesized hydrothermally. The dense hydroxyapatite ceramics with controlled OH were prepared at the temperatures from 800°C to 1000 °C for 10 min. Transparent hydroxyapatite ceramics were prepared by SPS at 900 °C and 1000 °C. The amount of OH ion in the structure of hydroxyapatite was decreased with increasing temperature of sintering. The hydrothermally treated HA fine crystals have the high sinterability.
- Phosphorus Research Bulletin
Phosphorus Research Bulletin 17(0), 240-245, 2004
Japanese Association of Inorganic Phosphorus Chemistry