Thermal, spectroscopic and dielectric investigation of Na2–2xLi2xPbP2O7 glasses
| Autor: | J. Aride, K. Benkhouja, S. Abadi, Mhamed Taibi, M. Haddad |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Analytical chemistry Physics::Optics Mineralogy Crystal growth 02 engineering and technology Activation energy Dielectric 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Amorphous solid law.invention Differential scanning calorimetry law General Materials Science Dielectric loss Crystallization 0210 nano-technology Glass transition Instrumentation |
| Zdroj: | Phase Transitions. 90:882-893 |
| ISSN: | 1029-0338 0141-1594 |
| DOI: | 10.1080/01411594.2016.1278446 |
| Popis: | The Na2–2xLi2xPbP2O7 glasses were elaborated using the usual melting method. The amorphous system was analyzed by X-ray diffraction. The effects of the substitution of the Na+ ions by the Li+ ones on glass transition temperature, crystallization temperature and thermal stability were investigated using differential scanning calorimetry. The kinetics parameters such as activation energy Ea of the glass crystallization, the activation energy for crystal growth EG, Avrami exponent n and factor depending on the growth morphology during the process of crystallization m were determined using different models. The IR and Raman spectra are examined in order to show the influence of the composition on the vitreous structure. The dielectric studies were conducted as a function of temperature and frequencies to evaluate the composition effect on the dielectric constant, dielectric loss and ionic conductivity. |
| Databáze: | OpenAIRE |
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