Fabrication, characterization, and properties of hydroxyapatite ceramics derived from cockle shell

Hydroxyapatite (HAp) powder was synthesized through a precipitation method using waste cockle shell as a calcium source. HAp powder had a single phase of Ca 5 (PO 4 ) 3 OH with a Ca/P ratio of 1.77. The crystals were rod-like, 80–110 nm long, and 20–30 nm wide. HAp ceramics sintered below 1350 °C in...

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Bibliographic Details
Published in:Journal of the Australian Ceramic Society 2022-09, Vol.58 (4), p.1081-1093
Main Authors: Sri-o-sot, Siriwadee, Vepulanont, Klatnatee, Kamkit, Chutima, Srichumpong, Thapanee, Chanadee, Tawat
Format: Article
Language:English
Subjects:
Ceramics
Chemistry and Materials Science
Composites
Glass
Inorganic Chemistry
Materials Engineering
Materials Science
Natural Materials
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Summary:Hydroxyapatite (HAp) powder was synthesized through a precipitation method using waste cockle shell as a calcium source. HAp powder had a single phase of Ca 5 (PO 4 ) 3 OH with a Ca/P ratio of 1.77. The crystals were rod-like, 80–110 nm long, and 20–30 nm wide. HAp ceramics sintered below 1350 °C in air resulted in ceramics with a stable HAp phase. The formation of β-tricalcium phosphate impaired the flexural strength of the specimen. The microhardness increased with sintering temperature due to the modification of density and porosity. The chemical solubility in acetic acid was related to density, porosity, and grain size. HAp ceramic sintered at 1250 °C provided appropriate properties for medical and dental applications. This ceramic had a grain size of 1.44 ± 0.37 µm, a density of 2.85 ± 0.01 g/cm 3 , a microhardness of 4.17 ± 2.37 GPa, a porosity of 10.3 ± 0.71%, a flexural strength of 46.13 ± 4.53 MPa, and a chemical solubility of 2.64 ± 0.10%.
ISSN:2510-1560
2510-1579
DOI:10.1007/s41779-022-00757-8