Effect of Co-Precipitation on the Low-Temperature Sintering of Biphasic Calcium Phosphate |
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| Authors: | Youn-Ki Jun Seong-Hyeon Hong Young-Min Kong |
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| Affiliation: | School of Materials Science and Engineering and Nano Systems Institute–National Core Research Center, Seoul National University, Seoul 151-742, Korea; Process Technology R &D, LG Chem. Ltd. Research Park, Daejeon 305-380, Korea |
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| Abstract: | Three types of biphasic calcium phosphate (BCP) powders were prepared and their sintering behavior was investigated. The specific surface area and HA/TCP ratio were similar in all three specimens. Most of the densification in the co-precipitated s-BCP occurred before the β- to α-TCP phase transformation, and a maximum density of ∼95% was obtained at 1100°C. The mixture of separately precipitated and calcined hydroxyapatite (HA) and tricalcium phosphate (TCP) (m-BCP) showed a poor sintering behavior, and the apparent density was below 70% at temperatures up to 1200°C. In the commercial HA and TCP mixture (c-BCP), the low temperature sintering was poor, but densification continued without the phase transformation due to the presence of MgO, achieving almost full densification at 1200°C. |
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