Spectroscopic Studies of 50Bi<sub>2</sub>O<sub>3</sub>-(50 - x)B<sub>2</sub>O<sub>3</sub>-xSm<sub>2</sub>O<sub>3</sub> Glasses System
- 1 Department of Physics, Faculty of Science, King Mongkut’s University of Technology Thonburi, Bangkok, Thailand
- 2 Center of Excellence in Glass Technology and Materials Science, Nakhon Pathom Rajabhat University, Nakhon Pathom, Thailand
- 3 Center of Excellence in Glass Technology and Materials Science, Nakhon Pathom Rajabhat University, Nakhon Pathom, Thailand
- 4 Department of Physics, Kyungpook National University, Daegu, South Korea
- 5 Department of Physics, Kyungpook National University, Daegu, South Korea
- 6 Department of Physics, Faculty of Science, King Mongkut’s University of Technology Thonburi, Bangkok, Thailand
Abstract
Sm 3+ doped bismuth borate glasses of the composition (50 - x )B 2 O 3 :50Bi 2 O 3 : x Sm 2 O 3 (where x = 0.00, 0.50, 1.00, 1.50, 2.00 and 2.50 mol%) have been synthesized by conventional melt quenching technique. In order to understand the role of Sm 2 O 3 inbismuth borate glasses, the density, the molar volume, the refractive index and the optical absorption were investigated. The results show that density, molar volume and refractive index of glasses increased with increasing Sm 2 O 3 concentration. The increase of molar volume with Sm 2 O 3 concentration is due to increase of non-bridging oxy - gen (NBOs) in the glass matrices. The optical absorption spectra were measured in the wavelength range 300 - 1100 nm and the optical band gaps were determined. It was found that the optical band gap decreased with the increase of Sm 2 O 3 concentration. Moreover, the X-ray s luminescence of Sm 2 O 3 glasses samples were measured and shows emission band at 4 G 5/2 → 6 H 5/2 (569 nm), 4 G 5/2 → 6 H 7/2 (598 nm), 4 G 5/2 → 6 H 9/2 (641 nm) and 4 G 5/2 → 6 H 11/2 (705 nm).
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