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Mixed Alkali Effect in Cr3+-Doped Li2O-K2O-B2O3 Glasses: Spectroscopic Investigations
Abstract
Lithium-potassium-borate (LKB) glass was prepared by varying the concentrations of Cr3+ dopant using the melt-quenching technique. Further, UV-visible absorption, EPR, and FT-IR spectroscopy processes were carried out on the prepared samples. Evaluations were also conducted on a wide range of physical parameters. Nonlinear variations in physical parameters were observed for different glasses, indicating Mixed Alkali Effect (MAE). Various optical parameters, including Urbach energy and optical band gap were derived from the optical absorption data. Data from optical absorption were used to evaluate the crystal field and Racah parameters. The calculated bonding parameters suggest a covalent nature. The EPR spectrum of LKB glass doped with Cr3+ demonstrates significant signals that are characteristic of Cr3+ ions in distorted octahedral symmetry. The FTIR spectrum conveys trigonal BO3 and tetrahedral BO4 structural components that exist in the glass material.
About the Authors
G. S. Rao
Department of Physics, NRI Institute of Technology (Autonomous), Agiripalli, Eluru (Dt)
India
India
Vijayawada
J. K. Babu
Department of Physics, Gokaraju Lailavathi Engineering College, Bachupally
India
India
Hyderabad
K. Vagdevi
Department of Physics, Gokaraju Rangaraju Institute of Engineering & Technology
India
India
Hyderabad
K. Palle
Department of H&S (Chemistry), CVR College of Engineering
India
India
Hyderabad, Telangana
R. Vijay
Basic Engineering Department, DVR & Dr. HS MIC College of Technology
India
India
Kanchikacherla
L. Vijayalakshmi
Department of Mechanical Engineering, Yeungnam University
Korea, Republic of
Korea, Republic of
Gyeongsan si
J. Lim
Department of Mechanical Engineering, Yeungnam University
Korea, Republic of
Korea, Republic of
R. V. S. S. N. Ravikumar
Department of Physics, Acharya Nagarjuna University
India
India
Nagarjunanagar
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Review
For citations:
Rao G.S., Babu J.K., Vagdevi K., Palle K., Vijay R., Vijayalakshmi L., Lim J., Ravikumar R. Mixed Alkali Effect in Cr3+-Doped Li2O-K2O-B2O3 Glasses: Spectroscopic Investigations. Zhurnal Prikladnoii Spektroskopii. 2025;92(6):823.
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