Advances in Chemistry and Materials Science
Volume 1 | Issue 1 | Pages 01-06
Physical and Optical Analysis of Erbium doped Magnesium Zinc Phosphate Glass
M. R. Sahar 1*, S.K. Zain 1, N. A. Ishak 1, E. S. Sazali 1, N. M. Yusoff 1
1 Advanced Optical Materials Research Group, Department of Physics, Faculty of Science Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor, Malaysia.
Glasses with composition of (60-x)P2O5-10MgO-30ZnO-(x)Er2O3 where x = 0, 0.5, 1.0 and 1.5 mol% have successfully been prepared by melt quenching technique. The amorphous nature of the glass has been determined by using X-ray Diffractometer (XRD). The physical properties have been determined by mean of glass density and molar volume, while the optical properties have been characterized by UV-Vis Spectroscopy (UV-Vis). It is found that all glasses are amorphous in nature. The glass density is found to be in range of (2.753-2.791) g cm-3 and is increasing as the Er2O3 concentration is increased up to 0.5 mol%, but decreases as the Er2O3 concentration is further increased up to 1.5 mol%. The molar volume of the glass exhibit an opposite trend with the density. UV-Vis spectra reveal seven absorption band from the ground state 4I15/2 to to the excited states 4F7/2, 2H11/2, 4S3/2, 4F9/2, 4I9/2, 4I11/2 and 4I13/2, centered at 486, 520, 550, 650, 792, 974 and 1536 nm, respectively. The optical band gap energy of the glass decreases as the Er2O3 concentration is increased from 0.0 mol% to 0.5 mol% but increases as the Er2O3 concentration is further increased up to 1.5 mol%. Bonding characteristic of the glass is studied via Racah parameter that is accomplished from UV-Vis absorption spectra. All the results are discussed with respect to the Er2O3 content.
Keyword: Phosphate glasses, XRD, Optical energy band gap, Bonding characteristic, Racah parameter