Naslov
High Electronically Conductive Tungsten Phosphate Glass-Ceramics

Autori
Renka, Sanja ; Klaser, Teodoro ; Burazer, Sanja ; Mošner, Petr ; Kalenda, Petr ; Šantić, Ana ; Moguš-Milanković, Andrea

Izvornik
Nanomaterials (2079-4991) 10 (2020), 12; 2515, 12

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
binary tungsten phosphate glass-ceramics ; crystallization ; electronic transport ; W2O3(PO4)2 phase ; semiconducting WO3 phase

Sažetak
High electronically conductive tungsten phosphate glass-ceramics have been prepared by the controlled crystallization of binary 60WO3– 40P2O5 glass in the temperature range from 700 to 935 ◦C and for 1 to 24 h. The substantial increase in the conductivity for four orders of magnitude is a result of the formation of electronically conductive W2O3(PO4)2 and WO3 phases. At low crystallization temperature the dominant W2O3(PO4)2 phase is created, whereas at 935 ◦C for 24 h the formation of semiconducting WO3 crystallites of an average size of 80 nm enhances the conductivity to the highest value of 1.64 × 10−4 (W cm)–1 at 30 ◦C. The course of the crystallization and its impact on this exceptionally high electronic transport of binary tungsten phosphate glass- ceramics has been discussed in detail. Since such highly electronically conductive WO3-based glass-ceramics have a great potential as cathode/anode materials in solid state batteries and as electrocatalysts in fuel cells, it is of interest to provide a novel insight into the improvement of their electrical properties.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija

Napomena
This article belongs to the Special Issue Preparation and Application of Nanostructured Glass–Ceramics and Nanocomposites.

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