PREPARATION OF LARGE-SIZED HYDROXYAPATITE WHISKERS USING CALCIUM TRIPOLYPHOSPHATE

Hydrothermal methods are useful for preparation of hydroxyapatite (HAp) whiskers. In particular, the method utilizing tripolyphosphate compound as a starting material has an advantage in that the whiskers can be prepared with high production efficiency at relatively low hydrothermal temperature. In...

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Bibliographic Details
Published inPhosphorus Research Bulletin Vol. 17; pp. 180 - 185
Main Authors Mizutani, Yoichiro, Hattori, Masateru, Okuyama, Masahiko, Kasuga, Toshihiro, Nogami, Masayuki
Format Journal Article
LanguageEnglish
Published Japanese Association of Inorganic Phosphorus Chemistry 2004
Subjects
Acid
Calcium tripolyphosphate
Hydroxyapatite
Titanium dioxide
Whisker
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Summary:Hydrothermal methods are useful for preparation of hydroxyapatite (HAp) whiskers. In particular, the method utilizing tripolyphosphate compound as a starting material has an advantage in that the whiskers can be prepared with high production efficiency at relatively low hydrothermal temperature. In the present work, large-sized HAp whiskers of 50~85μm in length were prepared by a hydrothermal treatment of calcium tripolyphosphate using a nitric acid to adjust the pH value before the reaction at 140°C for 24h. The whisker length was controlled by content of the nitric acid. Formation of by-products could be inhibited by addition of a trace amount of titanium dioxide.
ISSN:0918-4783
1882-2363
DOI:10.3363/prb1992.17.0_180