کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10160318 | 73 | 2011 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural and spectroscopic characterization of a series of potassium- and/or sodium-substituted β-tricalcium phosphate
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Structural and spectroscopic characterization of a series of potassium- and/or sodium-substituted β-tricalcium phosphate Structural and spectroscopic characterization of a series of potassium- and/or sodium-substituted β-tricalcium phosphate](/preview/png/10160318.png)
چکیده انگلیسی
In this paper, we report X-ray diffraction investigations as well as Raman and solid-state 31P and 23Na magic angle spinning nuclear magnetic resonance (NMR) characterization of three series of calcium orthophosphates. The general formulae of the studied compounds are Ca10.5âx/2Mx(PO4)7, where M = K or Na and x = 0, 0.25, 0.50, 0.75, 1.0; and Ca10KxNa1âx(PO4)7, where x = 0, 0.25, 0.5, 0.75, 1.0. These calcium orthophosphates are found to be isostructural with β-tricalcium phosphate (β-TCP, Ca3(PO4)2) with the substitution of some calcium sites by potassium and/or sodium cations. The unit cell parameters vary continuously with the level of substitution, a characteristic of these solid solutions. The Raman spectra show the different vibrational bands of the phosphate groups PO4, while the NMR chemical shifts are sensitive to the non-equivalent phosphorus and sodium ions present in these substituted samples. As both Raman and NMR spectroscopies are local probes, they offer tools to distinguish between these different phosphorus and phosphate groups, according to their structural site and local environment, especially the type of cation substituent. A convenient decomposition of the Raman and NMR spectra into Gaussian-Lorentzian components leads us to propose an assignment of the main observed bands of these substituted β-TCPs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Biomaterialia - Volume 7, Issue 4, April 2011, Pages 1844-1852
Journal: Acta Biomaterialia - Volume 7, Issue 4, April 2011, Pages 1844-1852
نویسندگان
S. Quillard, M. Paris, P. Deniard, R. Gildenhaar, G. Berger, L. Obadia, J.-M. Bouler,