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Humidity sensing behavior and its influence on the dielectric properties of (In + Nb) co-doped TiO2 ceramics.
- Source :
-
Journal of Materials Science . Dec2019, Vol. 54 Issue 24, p14645-14653. 9p. 1 Black and White Photograph, 2 Charts, 5 Graphs. - Publication Year :
- 2019
-
Abstract
- In this paper, the (In0.5Nb0.5)xTi1−xO2 (with x = 0, 0.005, 0.01, 0.02, 0.05, and 0.1) ceramics were prepared by solid-state reaction. To investigate the humidity sensitive properties, capacitance was measured as a function of relative humidity (RH). Our results reveal that the capacitance increases with the increase in RH and doping level. The best humidity sensitivity of 229.22 pF/%RH was achieved in the sample with x = 10. The humidity sensing mechanism was ascribed to the defects of oxygen vacancies and Nb Ti · ions. Besides, the humidity shows remarkable influence on the dielectric properties of the co-doped samples via the surface-layer effect, which leads to a Maxwell–Wagner relaxation near room temperature. This work underscores that the (In + Nb) co-doped samples are sensitive to the environment moisture. The processing conditions should be optimized for superior dielectric behavior in (In + Nb) co-doped TiO2 ceramics. [ABSTRACT FROM AUTHOR]
- Subjects :
- *DIELECTRIC properties
*HUMIDITY
*CERAMICS
*BEHAVIOR
*MOISTURE
Subjects
Details
- Language :
- English
- ISSN :
- 00222461
- Volume :
- 54
- Issue :
- 24
- Database :
- Academic Search Index
- Journal :
- Journal of Materials Science
- Publication Type :
- Academic Journal
- Accession number :
- 138792948
- Full Text :
- https://doi.org/10.1007/s10853-019-03945-3