Synthesis of Hydroxyapatite Powder and Its Thermal Stability

Abstract

Abstract: The role of gelatin was examined with the main focus on its induction ability of hydroxyapatite (HA) nucleation in a modified aqueous solution with gelatin.
The results show that when the addition of gelatin is in the range of 1wt%～3wt%, HA crystal is formed with a perfect crystalline. However, no HA nucleation occurrs
when gelatin content reaches 4wt% because of the steric effect. When the dried powder with 4wt% gelatin addition calcined at 900℃, the average size
of HA is about 40nm which is smaller than those of synthesized particles without gelatin addition. However, this powder is easier to decompose to β-TCP when
sintered at 1000℃, and the resultant β-TCP possesses a significant thermal stability up to 1500℃.

Key words: hydroxyapatite, gelatin, nucleation, thermal stability

CLC Number:

CAI Shu,YAO Kang-De,LI Hong-Xiang. Synthesis of Hydroxyapatite Powder and Its Thermal Stability[J]. Journal of Inorganic Materials.

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Synthesis of Hydroxyapatite Powder and Its Thermal Stability

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