HIP法による透光性ハイドロキシアパタイトセラミックスの作製とその物理的性質

概要

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The translucent and colorless calcium and strontium hydroxyapatite (Ca, Sr)-HAp ceramics with compositions of (Ca_<10-10x>Sr_<10x>)(PO_4)_6(OH)_2, where x=0-0.8, were successfully prepared by hot isostatic pressing (HIP). The physical properties of obtained samples with x=0-0.8 were investigated. The lattice constants and hexagonality, c/a, of (Ca, Sr)-HAp samples gradually increased with increasing Sr content and were in good agreement with the data listed in JCPDS cards. The relative density for all samples HIP-treated was in the range of 96.4 to 99.7%. The values of Vickers hardness, H_V, for all samples were almost constant in the range 5.5-5.9 GPa regardless of the change in x, exhibiting the good approximation to the H_V values of natural teeth. From the FE-SEM observations, the obtained samples had almost pore free microstructures consisting of about 1.6-1.9 μm HAp grains. Judging from FT-IR measurements, there is the possibility that the (Ca, Sr)-HAp ceramics HIP-treated are applicable to special uses such as optical matched filters.
社団法人日本セラミックス協会の論文
1997-03-01