Abstract
The relationship between the oxidation-reduction state of rare-earth (RE) elements (Sm, Gd, Eu, Ce, Nd), optical properties and the structural evolution of aluminoborosilicate glasses is studied. The study of the optical characteristics of glass is carried out by measuring optical transmission and analyzing Raman spectra. It is found that the increase in the concentration of monovalent Nd ions leads to the broadening of the optical band of forbidden energies (the band gap Eg), while the larger content of multivalent Sm, Eu, and Ce ions significantly decreases its width. The narrowing of Eg results from the irradiation of glass with a high-energy electron flux (2.5 MeV, a dose of up to 109 Gy). The observed evolution is explained by the coexistence of different charge states and the local environments of RE ions in the studied glass. The presence of different charge states of RE ions causes an increase in the number of color centers, while variations in the local environment of ions change the amount of nonbridging oxygen in the structure.
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.
