Hydrothermal synthesis of hydroxyapatite whiskers
2025-08-07
Hydroxyapatite (HA) whiskers have a low dislocation density and high tensile strength, making them suitable as toughening materials for bioceramics. In the experiment, calcium carbonate and dicalcium phosphate were used as raw materials to synthesize HA whiskers with high crystallinity and intact grains through a hydrothermal method. The phase composition, morphology, and structure of HA were analyzed using XRD, SEM, and FT-IR. Additionally, the ζ potential and particle size distribution of the product were measured using a particle size and ζ potential analyzer. The results indicate that increasing the hydrothermal temperature promotes crystal growth along the c-axis; at 220°C for 10 hours, HA whiskers with an end diameter of 0.8 μm and length of 6 μm were obtained, with a small amount of carbonate incorporated into the apatite structure. HA disperses more uniformly and stably in ethylene glycol than in water, with an average powder particle size of about 2 μm.
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Hydrothermal synthesis of hydroxyapatite whiskers
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