Abstract
Potassium–zinc borophosphate glasses were prepared and studied in two compositional series xK 2O–(50− x)ZnO–10B 2O 3–40P 2O 5 and xK 2O–(50− x)ZnO–20B 2O 3–30P 2O 5 with x=0, 10, 20, 30, 40 and 50 mol% K 2O. The replacement of zinc by potassium decreases the density and increases the molar volume of these glasses, whereas glass transition temperature and chemical durability decrease with increasing potassium content. Structural changes were studied by 11B and 31P MAS NMR and Raman spectroscopy. The observed changes in the spectra and the properties of the studied glasses can be ascribed to several reasons and namely to the differences in the space occupied by cations Zn 2+ and 2K +, the differences in the electronegativity of zinc and potassium and a large difference in the field strength of Zn 2+ and K + cations and thus higher ionicity of K–O bonds in comparison with Zn–O bonds.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
