Densification-crystallization behavior of biodegradable copper-doped modified ۴۵S۵ glasses

In the current work, modified ۴۵S۵ glasses containing different amounts of copper oxide (۱, ۳, and ۵ weight ratios) were prepared using melting procedure and characterized for their physical properties after sintering at various temperatures. Characterization of the copper doped glasses was performed using various analytical techniques, including X-ray diffractometry, differential thermal analysis, and scanning electron microscopy. To this purpose, a systematic study was conducted on densification-crystallization of the copper doped glasses and optimizing sintering temperature. Differential thermal analysis revealed weak exothermic peaks located above ۸۰۰ °C, corresponding to the crystallization temperature (Tc) of the studied glasses. This analysis suggests that copper oxide has a limited effect on the thermal properties of the modified ۴۵S۵ glasses. Densification behavior of glass specimens was studied at temperatures ranging from ۶۰۰ to ۸۵۰ °C. The optimal densification temperature was found to be ۶۵۰ °C, respectively. The results indicated that the presence of copper ions in the structure of studied glasses results in the formation of porous structures after sintering. It seems that copper ions generate oxygen gas during sintering and promote the formation of a cellular foam structures.In the current work, modified ۴۵S۵ glasses containing different amounts of copper oxide (۱, ۳, and ۵ weight ratios) were prepared using melting procedure and characterized for their physical properties after sintering at various temperatures. Characterization of the copper doped glasses was performed using various analytical techniques, including X-ray diffractometry, differential thermal analysis, and scanning electron microscopy. To this purpose, a systematic study was conducted on densification-crystallization of the copper doped glasses and optimizing sintering temperature. Differential thermal analysis revealed weak exothermic peaks located above ۸۰۰ °C, corresponding to the crystallization temperature (Tc) of the studied glasses. This analysis suggests that copper oxide has a limited effect on the thermal properties of the modified ۴۵S۵ glasses. Densification behavior of glass specimens was studied at temperatures ranging from ۶۰۰ to ۸۵۰ °C. The optimal densification temperature was found to be ۶۵۰ °C, respectively. The results indicated that the presence of copper ions in the structure of studied glasses results in the formation of porous structures after sintering. It seems that copper ions generate oxygen gas during sintering and promote the formation of a cellular foam structures.

کلیدواژه ها:

Modified ۴۵S۵ glass ، Copper oxide ، Bioactive glass ، Densification ، Crystallization behavior