Hydrothermal synthesis and morphology variation of cadmium hydroxyapatite

Journal Article · Wed Dec 01 00:00:00 EST 2004 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2004.09.025· OSTI ID:20658215

Zhu, Kongjun ^[1]; Yanagisawa, Kazumichi ^[1]; Onda, Ayumu ^[1]; Kajiyoshi, Koji ^[1]

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1. Research Laboratory of Hydrothermal Chemistry, Faculty of Science, Kochi University, 2-5-1 Akebono-cho, Kochi-shi 780-8520 (Japan)

Cadmium hydroxyapatite (Cd-Hap) crystals were synthesized by hydrothermal method at 200{sup o}C using the solutions of Cd(NO{sub 3}){sub 2}.4H{sub 2}O and (NH{sub 4}){sub 2}HPO{sub 4}. Influences of pH values and reaction time on the crystalline phases and morphology of the products were investigated. In low pH reaction media, Cd{sub 5}H{sub 2}(PO{sub 4}){sub 4}.4H{sub 2}O was formed and a relatively high pH reaction media was necessary to obtain Cd-Hap. Morphology of the Cd-Hap crystals changed from stubby hexagonal prismatic to rod-like in shape with the increase in the pH value. This morphological change was explained by the difference in growth mechanism through intermediate phases, Cd{sub 5}H{sub 2}(PO{sub 4}){sub 4}.4H{sub 2}O in the low pH reaction media and Cd{sub 2}P{sub 2}O{sub 7}.5H{sub 2}O in the high pH reaction media.

• OSTI ID: 20658215
• Journal Information: Journal of Solid State Chemistry, Vol. 177, Issue 12; Other Information: DOI: 10.1016/j.jssc.2004.09.025; PII: S0022-4596(04)00525-0; Copyright (c) 2004 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
AMMONIUM PHOSPHATES
APATITES
CADMIUM COMPOUNDS
CALCIUM NITRATES
CALCIUM PHOSPHATES
CRYSTAL GROWTH
HYDROTHERMAL SYNTHESIS
MORPHOLOGICAL CHANGES
MORPHOLOGY
PH VALUE