Improving structure and properties of lead phosphate glass through precipitation of few crystals from CeO2
Gjam, F., Eldamrawi, G., Meikhail, M., Abdelghany, M. (2021). Improving structure and properties of lead phosphate glass through precipitation of few crystals from CeO2. EKB Journal Management System, 64(7), 3927-3933. doi: 10.21608/ejchem.2021.53105.3124
Fauzia Zaid Gjam; Gomaa Eldamrawi; Mahrous Shaker Meikhail; Mohamed Abdelghany. "Improving structure and properties of lead phosphate glass through precipitation of few crystals from CeO2". EKB Journal Management System, 64, 7, 2021, 3927-3933. doi: 10.21608/ejchem.2021.53105.3124
Gjam, F., Eldamrawi, G., Meikhail, M., Abdelghany, M. (2021). 'Improving structure and properties of lead phosphate glass through precipitation of few crystals from CeO2', EKB Journal Management System, 64(7), pp. 3927-3933. doi: 10.21608/ejchem.2021.53105.3124
Gjam, F., Eldamrawi, G., Meikhail, M., Abdelghany, M. Improving structure and properties of lead phosphate glass through precipitation of few crystals from CeO2. EKB Journal Management System, 2021; 64(7): 3927-3933. doi: 10.21608/ejchem.2021.53105.3124

Improving structure and properties of lead phosphate glass through precipitation of few crystals from CeO2

Egyptian Journal of Chemistry
Article 65, Volume 64, Issue 7, July 2021, Page 3927-3933  XML PDF (482.93 K)
Document Type: Original Article
DOI: 10.21608/ejchem.2021.53105.3124
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Authors
Fauzia Zaid Gjam email 1; Gomaa Eldamrawi2; Mahrous Shaker Meikhail2; Mohamed Abdelghany3
1physics department , faculty of science, Mansoura university
2Physics Department, Faculty of Science, Mansoura University, Mansoura 35516, Egypt.
3Glass Research Group, Physics Department, Faculty of Science, Mansoura University, Mansoura 35516, Egypt
Abstract
New lead-cerium phosphate glasses in the system xCeO2(50-x)PbO-50P2O5 were successfully prepared by the melt-quenching process. The amorphous and/or crystalline character of the as prepared compositions were confirmed by both X-ray powder diffraction (XRD) and electron diffraction patterns (EDP) related to transmission electron microscopy (TEM). The surface morphology and the analytical amounts of glasses constituents have been studied by scanning electron microscopy (SEM) equipped with Energy-dispersive X-ray spectroscopy (EDX) apparatus. It was found that P2O5 as a host network can dissolve extremely high concentration from CeO2 without crystallization of the host glass network. Some cerium phosphate (CeP2O6) clusters can be formed and precipitated in the main amorphous network, particularly in glasses of high CeO2 contents ˃ 20 mol%. Formation of such type of clusters has an effective influence on enhancing material structure and properties, since the hardness number of the studied materials is highly enhanced. The chemical shift 31P NMR of glasses is improved toward increasing shielding process by the effect of CeO2 addition.
Keywords
Cerium oxide; Morphology; Precipitated; Hardness; Shielding process
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