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Abstrakt
Sodium-calcium-phosphate glasses doped with SiO2 or Si3N4 having similar sodium ion concentrations were prepared by melt quenching. The conductivity was measured by impedance spectroscopy under nitrogen atmosphere in a wide frequency range (10 mHz–1 MHz) and wide temperature range (153–473 K). At 36.6 °C, DC conductivities of all glasses vary between 1.1 ∗ 10−12 and 8.9 ∗ 10−12 S cm−1 and have similar activation energies (between 0.87 and 0.91 eV), which are characteristic for an ionic conduction mechanism. The analysis of AC conductivities showed that the spectra are governed by one dynamic process – hopping of the mobile charge carriers - which may be described i.e., by the ‘concept of mismatch and relaxation’ or by the ‘random barrier’ model. The obtained results confirmed a higher influence of nitrogen incorporation on the various glass conductivity parameters than shown for silicon doping alone. However, the influence of fundamental structural changes on the glass conductivity is less relevant as is the overall sodium ion concentration, which remains the decisive factor for a high ion conduction.
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Autorzy (6)
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B Jonson
- Linnæus University Department of Built Environment and Energy Technology
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D Möncke
- Linnæus University Department of Built Environment and Energy Technology
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S Ali
- Linnæus University Department of Built Environment and Energy Technology
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Informacje szczegółowe
- Kategoria:
- Publikacja w czasopiśmie
- Typ:
- artykuł w czasopiśmie wyróżnionym w JCR
- Opublikowano w:
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SOLID STATE IONICS
nr 325,
strony 157 - 162,
ISSN: 0167-2738 - Język:
- angielski
- Rok wydania:
- 2018
- Opis bibliograficzny:
- Wójcik N., Jonson B., Barczyński R., Kupracz P., Möncke D., Ali S.: Electrical properties of Na2O-CaO-P2O5 glasses doped with SiO2 and Si3N4// SOLID STATE IONICS. -Vol. 325, (2018), s.157-162
- DOI:
- Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1016/j.ssi.2018.08.011
- Źródła finansowania:
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- Crafoord Foundation (Grant No: 20160900)
- ÅForsk Foundation (Grant No. 14-457).
- Weryfikacja:
- Politechnika Gdańska
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