Structure, optical and electrical behaviour of x(2Bi2O3.MnO).(10-x)B2O3 glasses
| Autor: | Salwa A.M. Abdel-Hameed, M. Eltohamy, Ahlam M. Fathi |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Diffraction Amorphous metal Materials science Band gap Scanning electron microscope Infrared Analytical chemistry 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Molar volume Differential thermal analysis 0103 physical sciences Materials Chemistry Ceramics and Composites Thermal stability 0210 nano-technology |
| Zdroj: | Journal of Non-Crystalline Solids. 510:71-80 |
| ISSN: | 0022-3093 |
| Popis: | Heavy metal glass samples of the system x(2Bi2O3.MnO).(10-x)B2O3 with different compositions were prepared via the conventional method. Differential thermal analysis (DTA), X-ray diffraction (XRD) and scanning electron microscopy (SEM) were utilized to study the thermal behaviour and structure of the glasses. Their physical, optical and electrical properties were studied to characterize the materials. The higher strength of the B O bond than the Bi O bond leads to an increase in the thermal stability of the prepared glass. Both the density and molar volume were increased with an increase in the x value, i.e., the Bi2O3 content. Phase separation is the main feature of the glass structure observed using SEM. Some traces from Bi2O3 and/or MnB4O7 were detected in samples B6 (x = 6) and B3 (x = 3) by XRD. The optical band gap (Eopt) lies between 2 and 3 eV; it increases with a decrease in Bi2O3 content. All glasses exhibited good transmission in the infrared (IR) region, reaching ~45% at ~1750 nm. The activation energies of these prepared compositions were estimated, and their conductivities were found to increase with increasing temperature, revealing their semiconducting character. |
| Databáze: | OpenAIRE |
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