Synthesis and phase transformation of calcium phosphate prepared from chicken eggshells and ammonium phosphate
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Publication Details
Author list: Pankaew P., Hoonnivathana E., Limsuwan P., Naemchanthara K.
Publisher: Trans Tech Publications
Publication year: 2011
Volume number: 214
Start page: 182
End page: 186
Number of pages: 5
ISBN: 9783037850633
ISSN: 1022-6680
eISSN: 1662-8985
Languages: English-Great Britain (EN-GB)
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Abstract
Material that shows hydroxyapatite and β-tricalcium phosphate phases is called biphasic calcium phosphate (BCP). In present work, biphasic calcium phosphate was prepared and characterized for future applications on the utilization of bioactivity of HAp and resorbability of β-TCP properties. It was simply synthesized by precipitation method using eggshell as the calcium source (Ca) in the form of calcium nitrate and ammonium phosphate as the phosphate source (P) to obtain biphasic calcium phosphate. The prepared BCP powders and crystal structure were characterized by X-ray diffraction (XRD), Rietveld refinements and Fourier transform infrared (FT-IR) techniques. The results indicate that BCP was observed at the calcining temperature of 800 °C and above. Furthermore, the crystallinity of BCP increases with increasing temperature from 800 - 1200 °C. The phase fraction of β-TCP is enhanced with pH of a solution from 8.6-10.6 and decrease with the temperature range of 800 - 1200 °C. The formation of BCP arises from its non-stoichiometric composition of materials such as variation of synthesis parameters. © (2011) Trans Tech Publications.
Keywords
Biphasic calcium phosphate, β-tricalcium phosphate