Hydroxyapatite powders prepared by wet method from Ca (OH)//2 and H//3PO//4 and calcined at 800 degree C were sintered in air at a temperature from 1100 degree to 1400 degree C for h. The obtained ceramics with relative densities of 73 plus or minus 2% (1100 degree C) minus 89 plus or minus 2% (1400 degree C) were HIP'ed under 100 or 500 MPa of Ar at 900 degree C for 2 h without any capsules. The post-sintering at 1100 degree C under 500 MPa brought about densification up to 97% for the samples more than 90% dense having closed pores, but it barely increased the density of samples with lower densities.
|Number of pages||3|
|Journal||Yogyo Kyokai Shi/Journal of the Ceramic Society of Japan|
|Publication status||Published - 1987 Jan 1|
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