Sodium-Ion Conductivity and Humidity-Sensing Properties of Na2O-MoO3-P2O5 Glass-Ceramics

Znanstveni rad - Izvorni znanstveni rad

• Autor: Mallaurie Foucaud
• Autor: Sanja Renka
• Autor: Teodoro Klaser
• Autor: Jasminka Popović
• Autor: Željko Skoko
• Autor: Petr Mošner
• Autor: Ladislav Koudelka
• Autor: Ana Šantić
• Autorova ustanova: Sveučilište u Zagrebu; Prirodoslovno-matematički fakultet; (Fizički odsjek)
• Znanstveno / umjetničko područje, polje i grana: PRIRODNE ZNANOSTI; Fizika

Sažetak (engleski)

A series of glass-ceramics were prepared by heat-treatments of 40Na2O-30MoO3-30P2O5 (in mol%) glass in a temperature range from 380 (Tg) to 490 °C (Tc) and for 1–24 h. The prepared glass-ceramics contain from 2 to 25 wt.% of crystalline NaMoO2PO4. The sodium-ion conductivity in these materials decreases up to one order of magnitude with an increase in the degree of crystallization due to the immobilization of sodium ions in crystalline NaMoO2PO4. The transport of sodium ions in these materials occurs primarily through the dominant continuous glassy phase, and it is weakly affected by the sporadically distributed crystalline grains. However, the prepared glass-ceramics exhibit high proton conductivity in a humid atmosphere and remarkable humidity-sensing properties; this could be related to crystalline NaMoO2PO4, which provides sites for water adsorption. The glass-ceramic prepared at 450 °C for 24 h shows the best humidity-sensing performance among all samples, showing an increase in proton conductivity for more than seven orders of magnitude with the increase in relative humidity from 0% to 95%. Under a highly humid atmosphere (95% relative humidity and 25 °C), the proton conductivity of this glass-ceramic reaches 5.2 × 10−3 (Ω cm)−1. Moreover, the electrical response of these materials on the change in the relative humidity is linear and reversible in the entire range of the relative humidity, which indicates that they are novel promising candidates for application as humidity sensors.

• Ključne riječi (engleski): sodium molybdenum phosphate glass-ceramics; crystallization; ionic conductivity; humidity sensors
• Jezik: engleski
• Vrsta publikacije: Znanstveni rad - Izvorni znanstveni rad
• Status objave: Objavljen
• Vrsta recenzije: Recenziran - međunarodna recenzija
• Verzija publikacije: Objavljena verzija rada (izdavačev PDF)
• Naslov časopisa: Nanomaterials
• Brojčani podaci: vol. 12, br. 2, 240
• e-ISSN: 2079-4991
• DOI: https://doi.org/10.3390/nano12020240
• URN:NBN: urn:nbn:hr:217:676703
• Datum objave publikacije: 2022-01-12
• Projekt: Šifra: IP-2018-01-5425; Naziv (hrvatski): Detaljan uvid u mehanizme polaronske i ionske vodljivosti u oksidnoj staklo-(keramici); Kratica: POLAR-ION-GLASS; Voditelj: Ana Šantić; Pravna nadležnost: Hrvatska; Financijer: Hrvatska zaklada za znanost; Linija financiranja: Research Projects
• URL dokumenta: https://www.mdpi.com/2079-4991/12/2/240
• Vrsta resursa: Tekst
• Prava pristupa: Otvoreni pristup
• Javna napomena: © 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Received: 30 November 2021; Accepted: 7 January 2022; Published: 12 January 2022.
• Datum i vrijeme pohrane: 2024-08-31 19:44:02