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
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20501 - Materials engineering
Result continuities
Project
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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