Search academic texts

Information × Registration Number 2112U001539, Article popup.category Thesis Title popup.author popup.publication 01-01-2012 popup.source_user Сумський державний університет popup.source http://essuir.sumdu.edu.ua/handle/123456789/34936 popup.publisher Sumy State University Description In this study, an aqueous sol-gel chemistry route based on phosphoric acid as the phosphorus precursor, calcium acetate monohydrate and cerium (III) nitrate hexahydrate as source of calcium and cerium ions, respectively, have been used to prepare cerium-substituted calcium hydroxyapatite (CHAp) powders. The tartaric acid was used as complexing agent in the sol-gel processing. The final products were obtained by calcination of the dry precursor gels for 5 h at 1000 °C. The phase transformations, composition, and structural changes in the polycrystalline samples were studied by infrared spectroscopy (IR), X-ray powder diffraction analysis (XRD), scanning electron microscopy (SEM), UV-visible reflection spectroscopy and luminescence measurements. It was demonstrated, however, that the high substitution of calcium by cerium does not proceed in the CHAp. The reflectance spectra of Ce substituted CHAp show nearly 100% reflection in the wavelength range of 450-800 nm. The luminescent properties of these samples were also investigated. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/34936 popup.nrat_date 2025-05-12 Close