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

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F22%3A39919179" target="_blank" >RIV/00216275:25310/22:39919179 - isvavai.cz</a>

  • Result on the web

    <a href="https://www.mdpi.com/2079-4991/12/2/240" target="_blank" >https://www.mdpi.com/2079-4991/12/2/240</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.3390/nano12020240" target="_blank" >10.3390/nano12020240</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

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

  • Original language description

    A series of glass-ceramics were prepared by heat-treatments of 40Na(2)O-30MoO(3)-30P(2)O(5) (in mol%) glass in a temperature range from 380 (T-g) to 490 degrees C (T-c) 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 degrees 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 degrees C), the proton conductivity of this glass-ceramic reaches 5.2 x 10(-3) (ohm 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.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    20501 - Materials engineering

Result continuities

  • Project

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2022

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Nanomaterials

  • ISSN

    2079-4991

  • e-ISSN

    2079-4991

  • Volume of the periodical

    12

  • Issue of the periodical within the volume

    2

  • Country of publishing house

    CH - SWITZERLAND

  • Number of pages

    12

  • Pages from-to

    240

  • UT code for WoS article

    000747660300001

  • EID of the result in the Scopus database

    2-s2.0-85122648101