Naslov
Electronic conductivity in vanadium phosphate glasses

Autori
Razum, Marta ; Pavić, Luka ; Čižmar, Tihana ; Šantić, Ana

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
10th ISE Satellite Student Regional Symposium on Electrochemistry : Book of Abstracts / Marcinek, Saša ; Mikić, Dajana - Zagreb : Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI), 2021, 7-7

ISBN
978-953-6894-6

Skup
10th Satellite Regional Symposium on Electrochemistry (ISE 2021)

Mjesto i datum
Online, 02.07.2021

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
electrical properties ; glass structure ; vanadium phosphate glasses

Sažetak
Electronic conduction has been detected in various melt-quenched oxide glasses which contain transition- metal oxides (TMO) such as V2O5, Fe2O3, MoO3, and WO3. These materials are of great scientific interest due to their potential application in many fields such as power sources, photonics, gas sensors, etc. The electronic conductivity in these glasses occurs via electron hopping between transition metal ions in different oxidation states and, as a rule, strongly depends on the amount of transition metal oxide and a fraction of transition metal ions in different valence states. Among various TMOs which can be incorporated into oxide glasses, vanadium (V) oxide is especially attractive since it participates in the glass network formation and hence can be added in large amounts. In this study, a series of binary xV2O5–(100–x)P2O5 glasses with a wide range of composition from x = 30 to x = 90 mol%, were prepared by the melt quenching method. Obtained glass samples were investigated by Raman and impedance spectroscopies. With the increase of V2O5 content bands attributed to the stretching vibrations of V–O and V–O–P bonds are observed. The DC conductivity of glasses increases with the increase of V2O5 due to an increase in the concentration of vanadium ions reaching the highest conductivity of 1.03 × 10-4 (Ω cm)-1 at 30 °C for glass with 90 mol% V2O5. All glasses obey Summerfield and Sidebottom scaling procedures of conductivity spectra indicating that the conductivity mechanism does not change with the temperature.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija

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