Trivalent-Cation-Substituted Calcium Oxyhydroxyapatite |
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| Authors: | KIMIHIRO YAMASHITA HITOSHI OWADA HIROSHI NAKAGAWA TAKAO UMEGAKI TAKAFUMI KANAZAWA |
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| Affiliation: | Department of Industrial Chemistry, Faculty of Technology, Tokyo Metropolitan University, Fukasawa 2-1-1, Setagaya-ku, Tokyo 158, Japan |
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| Abstract: | Synthesis of stable oxy- and oxyhydroxyapatkes [(Ca,M)-Ap] was attempted by substitution of Ca2+ with M3+ (M = Al, Y) assuming the composition Ca10-xMx(PO4)6(OH)2-xOx. Yttrium-calcium oxyhydroxyapatite was successfully obtained. Its structure was analyzed and confirmed by X-ray diffraction and infrared spectroscopy. Dielectric dispersion and absorption were not so distinct in (Ca,Y)-Ap as in hydroxyapatite (Ca-Ap). The ac electrical conductivity of (Ca10-x,Yx)-Ap was found to decrease with increasing x. These results are discussed in terms of a proposed charge transport mechanism. |
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