Elaboration and Characterization of Glasses and Ceramic-Glasses within Theternary Diagram Li2O-Cr2O3-P2O5
| Autor: | Yassine Er-Rouissi, Radouane Makhlouk, Abdelmjid Cherif, Said Aqdim |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Ternary numeral system Diagram General Engineering Analytical chemistry Relative permittivity Infrared spectroscopy Mineralogy 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences chemistry.chemical_compound Structural change chemistry Electrical resistivity and conductivity visual_art 0103 physical sciences visual_art.visual_art_medium Ceramic 0210 nano-technology Phosphorus pentoxide |
| Zdroj: | Advances in Materials Physics and Chemistry. :123-137 |
| ISSN: | 2162-5328 2162-531X |
| DOI: | 10.4236/ampc.2017.74011 |
| Popis: | Use of the regular melting-quench method allowed the isolation of a small glass domain within the ternary system Li2O-P2O5-Cr2O3 at 1000°C. Electrical conductivity and dielectric permittivity measures on sample glasses and ceramic glasses of this domain were performed at a frequency of 10 kHz and at temperatures between 25°C and 300°C. The values of dielectric permittivity and electrical conductivity increase with increasing Li2O content. However, increases of Cr2O3 content, even at low concentrations, induce a change in electrical conductivity behaviour from that of a glass to that of a ceramic glass. The introduction of an increasing amount of Li2O content in vitreous phosphorus pentoxide changes its three-dimensional network; rupture of the P-O-P bond then occurs and there is formation of easily polarisable entities with quite high values of . The vibrational spectroscopy technique I.R has allowed an efficient investigation of the structural change versus composition within the above indicated ternary diagram. The maximal dielectric permittivity obtained at 300°C, both for the glasses and for the ceramic glasses varied in the order 104 to 3 × 105, while the maximum electrical conductivity obtained at 300°C for the ceramic glasses was in the order of 10-3 Ωcm-1. |
| Databáze: | OpenAIRE |
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