@Article{CL.2024.213.243,
AUTHOR = {Yu. S. Hordieiev, A. V. Zaichuk},
TITLE = {Impact of aluminum fluoride addition on crystallization, structure and thermal properties of lead borate glasses},
JOURNAL = {Chalcogenide Letters},
VOLUME = {21},
YEAR = {2024},
NUMBER = {3},
PAGES = {243--253},
URL = {http://www.techscience.com/CL/v21n3/65078},
ISSN = {1584-8663},
ABSTRACT = {The glass composition (70-x)PbO–(30-y)B<sub>2</sub>O<sub>3</sub>–(x+y)AlF3, where x and y ranges from 0 to 20 mol%, were prepared using the conventional melt-quenching-annealing technique. The structural and thermal properties of the glasses were comprehensively analyzed using techniques like Differential Thermal Analysis (DTA), Dilatometry, Fourier-Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD), and Scanning Electron Microscopy (SEM). XRD confirmed the amorphous, non-crystalline structure of the glasses. The glass network was found to be composed of structural units such as PbO<sub>4</sub>, BO<sub>4</sub>, BO<sub>3</sub> and AlO<sub>6</sub> using FTIR spectroscopy. FTIR analysis revealed significant structural changes, including the transformation of BO<sub>4</sub> to BO<sub>3</sub> units and the increase in non-bridging bonds, particularly with higher AlF<sub>3</sub> content. DTA was instrumental in determining characteristic temperatures, such as the glass transition, melting, and peak crystallization temperatures, along with glass stability parameters (∆T, Hr, T<sub>gr</sub>) for all samples. The study found that the addition of AlF3 led to a decrease in these characteristic temperatures when replacing B<sub>2</sub>O<sub>3</sub>, but an increase when replacing PbO. Variations in the density and thermal expansion of the lead borate glass were observed upon the addition of AlF<sub>3</sub>, decreasing when substituting for PbO and increasing when substituting for B<sub>2</sub>O<sub>3</sub>. These findings provide insights into the properties of oxyfluoride glasses, paving the way for future optimization in their composition for varied applications.},
DOI = {10.15251/CL.2024.213.243}
}