Influence of CeO2 content on complex optical parameters of phosphovanadate glass system
| Autor: | R.V. Barde |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Diffraction Chemistry Analytical chemistry Physics::Optics Nanotechnology 02 engineering and technology Dielectric 021001 nanoscience & nanotechnology 01 natural sciences Optical conductivity Atomic and Molecular Physics and Optics Analytical Chemistry Polarizability Molar refractivity 0103 physical sciences Direct and indirect band gaps 0210 nano-technology Absorption (electromagnetic radiation) Instrumentation Refractive index Spectroscopy |
| Zdroj: | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 153:160-164 |
| ISSN: | 1386-1425 |
| DOI: | 10.1016/j.saa.2015.08.023 |
| Popis: | In the present work, glass system of the compositions of 60V2O5-5P2O5-(35-x)B2O3-xCeO2 is prepared by modified melt-quenching method. The conformation of amorphous phase in sample was done through X-ray diffraction analysis. Optical studies were carried out at room temperature and direct and indirect band gap energy, refractive index, Urbach energy, molar refractivity and polarizability have been determined. The values of indirect band gap are lower than the corresponding values of direct band gap. Urbach energy is observed between 0.58 and 0.48 eV. The samples show gradual increase in absorption around the 225 nm, which results in increase of refractive index and optical conductivity. The real and imaginary dielectric constants show good agreement with each other. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect