Effect of Amine Additives on the Morphology of Hydroxyapatite

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Long HA whiskers with uniform morphology, high aspect ratio, and good crystallinity could be prepared using a hydrothermal technique at 180 oC for 10 h. Whisker morphology was sensitively-dependent on preparation conditions. Compared with formamide and urea, acetamide showed a low hydrolysis rate; it was found to be an appropriate additive to synthesize HA whiskers. Length and aspect ratio could be controlled by selecting solution conditions with the Ca/P ratio at 1.67 in the range 42 - 84 mmol/L calcium and 25 - 50 mmol/L phosphate and 0.75 – 1.25 mol/L additive concentration (as amide, -NH2).

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Periodical:

Key Engineering Materials (Volumes 361-363)

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Edited by:

Guy Daculsi and Pierre Layrolle

Pages:

115-118

Citation:

H. Q. Zhang and B. W. Darvell, "Effect of Amine Additives on the Morphology of Hydroxyapatite", Key Engineering Materials, Vols. 361-363, pp. 115-118, 2008

Online since:

November 2007

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$38.00

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