A glass system of composition [(50-x) B2O3-
25ZnO-25Na2O-xCr2O3], where (x = 0.0, 0.1,
0.3, 0.5 mol.%) was synthesized applying traditional melt quenching technique. The amorphous
nature of the samples was proved using X-ray diffraction. The effect of Cr ion content
and γ ray irradiation on the optical, ESR, and FTIR spectra were studied. The optical
absorption spectra were carried out and a ligand field theory analysis was studied, utilizing
the resulting data. Through the analysis, the crystal field energy (10Dq), Racah parameters
(B and C), and nephelauxetic function (h) were calculated. The results reveal that a strong
crystal field strength around chromium ions. The obtained ESR signals pointed to both
Cr6+
and Cr3+
states are present in the host borate glass. FTIR spectra showed a minor
variation in the intensities of some absorption peaks after radiation. It can be connected
to either some limited changes in the bond angles or bond lengths within the borate glass
matrix. The effect of the γ irradiation on the structural properties of prepared samples has
no remarkable change, so the obtained samples are more stables against γ irradiation. |
