Chemical Durability, Properties and Structural Approach of the Glass Series xFe₂O₃-(45-x) PbO-55P₂O₅ (with 0 ≤ x ≤ 20;mol%)  

作　　者：Radouane Makhlouk Zineb Chabbou Yassine Er-rouissi M’hammed Taibi Said Aqdim Radouane Makhlouk;Zineb Chabbou;Yassine Er-rouissi;M’hammed Taibi;Said Aqdim(Laboratory of Materials Engineering for Environment and Valorization, Faculty of Sciences, Hassan II University Ain Chock, Casablanca, Morocco;Physico-Chemistry Laboratory of Inorganic and Organic Materials ENS, University Md V, Rabat, Morocco;Mineral Chemistry, Department of Chemistry, Faculty of Science, Hassan II University Ain Chock, Casablanca, Morocco)

机构地区：[1]Laboratory of Materials Engineering for Environment and Valorization, Faculty of Sciences, Hassan II University Ain Chock, Casablanca, Morocco [2]Physico-Chemistry Laboratory of Inorganic and Organic Materials ENS, University Md V, Rabat, Morocco [3]Mineral Chemistry, Department of Chemistry, Faculty of Science, Hassan II University Ain Chock, Casablanca, Morocco

出　　处：《New Journal of Glass and Ceramics》2023年第1期1-16,共16页玻璃与陶瓷期刊（英文）

摘　　要：The synthesis for glasses series xFe₂O₃-(45-x)PbO-55P₂O₅, (with 0 ≤ x ≤ 20;mol%) carried out in a temperature (1050 ± 10)°C, leads to obtaining transparent glasses, brown in color and with a non-hygroscopic appearance. The study of glasses dissolution rate, immersed in distilled water at 90°C for 24 days, indicates a considerable chemical durability. The increase in the Fe₂O₃ content in the vitreous network to the detriment of PbO is a favorable factor for the chemical durability improvement. Different techniques have been used such as X-ray diffraction, infrared spectroscopy, DSC, SEM and density for the study of these glasses. These techniques have led to establish correlations between chemical and structural properties. Thus the results obtained confirmed the creation of P-O-M bonds (M = Pb, Fe) with a strongly covalent nature to the detriment of the hydrated P-O-P bonds and led to the formation, mainly, of pyrophosphate groups. The low melting point of Pb-O makes it possible to play an important role, at the same time, on the viscosity, on the equilibrium between the vitreous bath and the crystallites formed. The dissolution rate obtained is 100 times smaller than that of silicate glasses used as an alternative form for the vitrification of radioactive waste.The synthesis for glasses series xFe₂O₃-(45-x)PbO-55P₂O₅, (with 0 ≤ x ≤ 20;mol%) carried out in a temperature (1050 ± 10)°C, leads to obtaining transparent glasses, brown in color and with a non-hygroscopic appearance. The study of glasses dissolution rate, immersed in distilled water at 90°C for 24 days, indicates a considerable chemical durability. The increase in the Fe₂O₃ content in the vitreous network to the detriment of PbO is a favorable factor for the chemical durability improvement. Different techniques have been used such as X-ray diffraction, infrared spectroscopy, DSC, SEM and density for the study of these glasses. These techniques have led to establish correlations between chemical and structural properties. Thus the results obtained confirmed the creation of P-O-M bonds (M = Pb, Fe) with a strongly covalent nature to the detriment of the hydrated P-O-P bonds and led to the formation, mainly, of pyrophosphate groups. The low melting point of Pb-O makes it possible to play an important role, at the same time, on the viscosity, on the equilibrium between the vitreous bath and the crystallites formed. The dissolution rate obtained is 100 times smaller than that of silicate glasses used as an alternative form for the vitrification of radioactive waste.

关 键 词：Phosphate Glasses Lead Iron Density IR DRX MEB Durabilité Chimique VITRIFICATION Nuclear Wastes 

分 类 号：TQ1[化学工程]