著者

大門 啓志 呉 敏 杉田 智和 引地 康夫 松原 孝至 太田 敏孝 可児 良弘

出版者

無機マテリアル学会

雑誌

Journal of the Society of Inorganic Materials, Japan

巻号頁・発行日

vol.8, no.293, pp.283-288, 2001

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A commercial hydroxyapatite, which has been regarded as a powder with low sinterability, was ground by four kinds of wet ball-milling in order to improve the sinterability. The effect of the grinding on the sinterability was investigated by comparing the four methods. When the powder was ground under water as a dispersion media, fine particles generated by the grinding cohere to reconstruct aggregates, then milling effects disappear. The fine particles without reconstructed aggregates can be obtained by ball-milling under ethyl alcohol as a dispersion media. The grinding efficiency can be improved by using balls with a high true density. The sizes of aggregates were diminished to 0.1-0.2μm by ball-milling using nylon coated iron balls. The powder ground by the nylon coated iron ball was formed into disks and then heated at 1200°C for 1 h. The bulk density of the sintered body was >98% of the theoretical density.