Optical absorption spectrum of (LiCl)x(P2O5)1−x glass
| Autor: | H. A. A. Sidek, Wan Mahmood Mat Yunus, Abdul Halim Shaari, Y. N. Loh, Z.A. Talib, Wan Mohamad Daud Wan Yusoff |
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| Rok vydání: | 2004 |
| Předmět: |
Materials science
Absorption spectroscopy Band gap business.industry Process Chemistry and Technology Analytical chemistry Mole fraction Surfaces Coatings and Films Electronic Optical and Magnetic Materials Wavelength Optics Absorption edge Materials Chemistry Ceramics and Composites business Absorption (electromagnetic radiation) |
| Zdroj: | Ceramics International. 30:1715-1717 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2003.12.146 |
| Popis: | A series of glasses (LiCl) x (P 2 O 5 ) 1− x with x =0.1–0.6 in the interval of 0.05 were prepared by a single-step melting process with LiCl and P 2 O 5 as starting materials. Their density and absorption spectra in the ultra-violet visible (UV-Vis) region have been recorded at room temperature. The Urbach rule has been applied to evaluate the fundamental absorption edges for all the glasses from the obtained spectrum. The optical band gaps were calculated from the absorption edge and it was found that the optical band gap, E opt , depended on the glass composition. The optical band gap decreases to lower energies and shifts to longer wavelength with the increase in LiCl content in glass. The absorption edge is attributed to indirect transitions. The densities of glasses were found to be varying between 2.33 and 2.52 g cm −3 for mole fraction of 0.1–0.6. The average density was 2.42 g cm −3 and no evidence of anomalous densities’ behaviour was observed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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