Morphological, spectroscopic and crystallographic studies of calcium phosphate bioceramic powders

Rafeek, AD; Choi, G; Evans, LA

Morphological, spectroscopic and crystallographic studies of calcium phosphate bioceramic powders

Rafeek, AD Choi, G Evans, LA

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Publication Type:: Journal Article
Citation:: Journal of the Australian Ceramic Society, 2018, 54 (1), pp. 161 - 168
Issue Date:: 2018-03-01

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Field	Value	Language
dc.contributor.author	Rafeek, AD	en_US
dc.contributor.author	Choi, G	en_US
dc.contributor.author	Evans, LA https://orcid.org/0000-0003-1544-6868	en_US
dc.date.issued	2018-03-01	en_US
dc.identifier.citation	Journal of the Australian Ceramic Society, 2018, 54 (1), pp. 161 - 168	en_US
dc.identifier.issn	0004-881X	en_US
dc.identifier.uri	http://hdl.handle.net/10453/132958
dc.description.abstract	© 2017, Australian Ceramic Society. Calcium phosphate (CaP) materials are chemically similar to human bone and tooth enamel. As a result, they have been used in numerous biomedical and dental applications. The aim of the current work was to synthesise two CaP powders, namely hydroxyapatite (HAp) and dicalcium phosphate dihydrate (DCPD) via a wet chemical precipitation method. During synthesis, pH was either kept constant using a pH-stat autotitrator or allowed to drift, age times were varied and in some experiments seed material was added to induce crystal growth. Phase identification was achieved using Fourier-transform infared (FTIR) spectroscopy and X-ray diffraction (XRD) analysis. Crystal morphology was evaluated using scanning electron microscopy (SEM). It was found that CaP phase precipitation is highly dependent on pH and not on initial Ca/P molar ratio. Ageing time of solutions in non-seeded experiments had a significant effect on crystallinity and phase precipitation from solution. Seeding effected the rate of phase transformation, crystallinity and morphology of CaP powders. A novel ‘grapevine’ morphology was observed for precipitates obtained from metastable solutions which had been seeded with highly crystalline DCPD.	en_US
dc.relation.ispartof	Journal of the Australian Ceramic Society	en_US
dc.relation.isbasedon	10.1007/s41779-017-0137-4	en_US
dc.subject.classification	Materials	en_US
dc.title	Morphological, spectroscopic and crystallographic studies of calcium phosphate bioceramic powders	en_US
dc.type	Journal Article
utslib.citation.volume	1	en_US
utslib.citation.volume	54	en_US
utslib.for	0912 Materials Engineering	en_US
utslib.for	0303 Macromolecular and Materials Chemistry	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
utslib.copyright.status	closed_access
pubs.issue	1	en_US
pubs.publication-status	Published	en_US
pubs.volume	54	en_US

Abstract:

© 2017, Australian Ceramic Society. Calcium phosphate (CaP) materials are chemically similar to human bone and tooth enamel. As a result, they have been used in numerous biomedical and dental applications. The aim of the current work was to synthesise two CaP powders, namely hydroxyapatite (HAp) and dicalcium phosphate dihydrate (DCPD) via a wet chemical precipitation method. During synthesis, pH was either kept constant using a pH-stat autotitrator or allowed to drift, age times were varied and in some experiments seed material was added to induce crystal growth. Phase identification was achieved using Fourier-transform infared (FTIR) spectroscopy and X-ray diffraction (XRD) analysis. Crystal morphology was evaluated using scanning electron microscopy (SEM). It was found that CaP phase precipitation is highly dependent on pH and not on initial Ca/P molar ratio. Ageing time of solutions in non-seeded experiments had a significant effect on crystallinity and phase precipitation from solution. Seeding effected the rate of phase transformation, crystallinity and morphology of CaP powders. A novel ‘grapevine’ morphology was observed for precipitates obtained from metastable solutions which had been seeded with highly crystalline DCPD.

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http://hdl.handle.net/10453/132958