Electrical and structural properties of K2O-Nb2O5-P2O5 glasses (CROSBI ID 705505)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija
Podaci o odgovornosti
Razum, Marta ; Pavić, Luka ; Ghussn, Luciana ; Moguš-Milanković, Andrea ; Šantić, Ana
engleski
Electrical and structural properties of K2O-Nb2O5-P2O5 glasses
Niobium phosphate glasses have functional properties which make them attractive for various fields of application, from optical and laser technology, nuclear waste immobilization to biomedicine. [1] Moreover, in combination with alkali oxides, niobium oxide can be incorporated in a phosphate network in a wide compositional range which makes these glasses interesting for electrical applications. In this study, glasses with composition xNb2O5-(100-x)[0.45K2O-0.55P2O5], x=10-50 mol%, were prepared by microwave heating and their ionic conductivity and structure were investigated by impedance and Raman spectroscopies. Raman spectra reveal that the glass structure changes from predominantly orthophosphate (x≤20 mol%) to predominantly niobate (x=50 mol%) with increasing Nb2O5 content. In the glass network, niobium forms NbO6 octahedra which, at higher Nb2O5 content, become mutually interconnected via Nb-O-Nb bonds. The changes of the electrical conductivity with composition suggest a strong influence of glass structure on the mobility of potassium ions. Glasses with predominantly orthophosphate structure and predominantly niobate glass network exhibit a slight decrease in DC conductivity with increasing Nb2O5 content, whereas intermediate glass compositions show a strong drop which could be attributed to the hampering effect of the mixed niobate-phosphate network on the diffusion of potassium ions. On the contrary, predominantly niobate glass network exhibits a rather facilitating influence which is evidenced not just by the trend of DC conductivity but also by the features of the frequency-dependent conductivity and typical hopping lengths of potassium ions.
conductivity spectra ; glass structure ; ionic conductivity ; niobium phosphate glasses
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
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Podaci o prilogu
41-41.
2021.
objavljeno
Podaci o matičnoj publikaciji
Book of Abstracts presented at the 14th International Symposium on Systems with Fast Ionic Transport (ISSFIT-14)
Petek, Urša ; Gaberšček, Miran
Ljubljana: National Institute of Chemistry Ljubljana
978-961-6104-50-0
Podaci o skupu
14th International Symposium on Systems with Fast Ionic Transport (ISSFIT 2021)
predavanje
07.07.2021-09.07.2021
online