Structural, thermal, and DC conductivity properties of WO 3 –P 2 O 5 glasses doped with B 2 O 3

• Published in: International journal of applied glass science Vol. 14; no. 2; pp. 247 - 255
• Main Author: Pershina, Svetlana V.
• Format: Journal Article
• Language: English
• Published: 01.04.2023
• ISSN: 2041-1286; 2041-1294
• DOI: 10.1111/ijag.16620

Abstract In this study, glasses in composition 70WO 3 –(30 −  х )P 2 O 5 – х B 2 O 3 (0 ≤  х  ≤ 20 mol%) were prepared by melt quenching method. The glass formation, structure, and thermal and electrical properties are discussed. Homogeneous glasses were obtained at x  = 0–10 mol% B 2 O 3 , whereas glasses with x  = 15 and 20 contain microinclusions of WO 3 . The glass transition temperature decreases from 709 to 531.6°C with increasing B 2 O 3 content, as well as the crystallization temperature and the thermal stability. The structure of the glasses was studied by Raman spectroscopy and infrared spectroscopy. The Raman spectra are characterized by a band near 995 cm −1 , a broad band at 788–800 cm −1 , and a band near 675 cm −1 ascribed to vibrations of W–O–P, W–O–W, and P–O–B bonds, respectively. The Fourier‐transform infrared spectra show vibrational bands due to characteristic phosphate and borate groups. Tetrahedral BO 4 units prevail in the structural network. The electrical conductivity of the glasses decreased with x content due to the growth of WO 3 ‐deficient regions.