Microstructural Investigation of Fluoroapatite Hydrothermally Converted from Hydroxyapatite Synthesized from Crocodile Eggshell

Abstract:

Fluoro/hydroxyapatite (FHAp) were prepared by hydrothermal at 150 °C for 24 hours with different of starting materials. The conversion of hydroxyapatite (HAp) and tricalcium phosphate to FHAp showed the rod-like shape with 200 nm. While, the morphology of FHAp from crocodile eggshell as CaCO₃ form with different in phosphorus and fluoride source showed the unique structure evolution from rod-like hexagonal crystals, dumbbell to ball shape. Two distinctive morphology, first when using NaF as fluoride source with (NH₄)₂HPO₄ precursor show the large cubic structure in high magnification it is tufted hexagonal crystal and it bundle like structure. As the pH value decreases in NH₄F, it increases crystal size. For H₃PO₄ as phosphate precursor found that unique structure evolution from rod-like hexagonal crystals to dumbbell structure and then form the sphere assembly with a size of several micrometers.

• Periodical: Journal of Metastable and Nanocrystalline Materials (Volume 32)
• Pages: 21-32
• DOI: https://doi.org/10.4028/www.scientific.net/JMNM.32.21
• Online since: April 2021
• Authors: Reedwan Bin Zafar Auniq, Weerapong Lerdrattranataywee, Upsorn Boonyang*
• Keywords: Crocodile Eggshell, Fluoroapatite, Hydrothermal Conversion, Hydroxyapatite, Microstructure

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