کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1653216 | 1007659 | 2007 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Highly sinterable β-tricalcium phosphate synthesized from eggshells Highly sinterable β-tricalcium phosphate synthesized from eggshells](/preview/png/1653216.png)
Highly sinterable β-tricalcium phosphate (β-TCP) powders were fabricated by using recycled eggshells in addition with polyethylene glycol (PEG). A raw eggshell was easily turned to CaO by the calcining process and the calcined eggshell was mixed with phosphoric acid by the wet, ball-milling method. The observed phases of the heated mixtures were dependent on the mixing ratio (wt.%) of the calcined eggshell and phosphoric acid. A polyethylene glycol was added to the solution mixtures for making highly sinterable powders. In the process using the polymer, the final synthesized β-TCP powders showed smaller particle sizes and better sinterability in comparison with the synthesized β-TCP powders prepared without PEG. The ball-milled β-TCP powders employing PEG, were fully densified at the low temperature of 1150 °C without any transformation to α-TCP.In this study, the crystalline developments and Ca/P molar ratios of the synthesized calcium phosphate powders were studied by X-ray diffractometry and chemical analysis using ICP AES. In addition, the microstructures of the β-TCP powders and densified β-TCPs were examined using a scanning electron microscope.
Journal: Materials Letters - Volume 61, Issue 6, March 2007, Pages 1279–1282