Spectroscopic, Structural, Thermal, and Mechanical Properties of B2O3-CeO2-PbO2 Glasses

The melt-quenching method has been used to fabricate a PbO2-B2O3-CeO2 glass system. The XRD diffractometer procedure was used to check the status of these samples. It can be concluded, from the X-ray diffraction curves, that the tested samples have high levels of glassiness. As the CeO2 concentration increased most of the [BO4] are converted into [BO3] structural units with the formation of non-bridging oxygen ions in the borate matrix. It can be cross verified with the decrease of the N-4 fraction from 0.654 to 0.239. This decrease may be attributed to the formation of [CeO7] structural units that needs more oxygen atoms. The ultrasonic velocities of the prepared glasses are decreased with the increase of CeO2 content. Different types of elastic modules were evaluated (experimental and theoretical) for the prepared glasses are increases with the increase of CeO2 content. Glass transition temperature (T-g), crystallization temperature (T-c), the peak of crystallization temperature (T-p) and thermal stability values decreases with the increase of CeO2 content. The refractive index of these samples is increasing with the increase in the reflection and the density.

Automated summary

Increasing CeO2 concentration in PbO2-B2O3-CeO2 glass system results in the conversion of [BO4] to [BO3] structural units and the formation of non-bridging oxygen ions. The decrease in N-4 fraction from 0.654 to 0.239 confirms the formation of [CeO7] structural units that require more oxygen atoms.