-, Ravikant and Singh, Sheshamani and Gupta, Gaurav and Yadav, Sanjay (2019) Highly-sensitive potassium-tantalum-niobium oxide humidity sensor. Journal of Electronic Materials, 295. pp. 133-140. ISSN 0924-4247
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Abstract
We report moisture sensitive properties of ferroelectric niobium-rich potassium tantalate K [(Ta0.2Nb0.8)(0.99)Mn-0.01]O-3 (KTN) which shows giant humidity response with excellent reproducibility and repeatability of data as a function of exposure time and humidity contents. Many fold change in resistance was observed with change in the relative humidity (Rh) from 15% to 95% which provides maximum sensitivity ((4) over tilde 600) at 298 K in the presence of Rh 95%. It also shows polarity dependent change in resistance with nearly 310 to 513 mV in-built potential depending on the device configuration. The polar KTN humidity sensor shows a decrease in resistance with an increase in Rh% which favors the Grotthuss mechanism responsible for humidity effects. To improve the sensitivity, a particular device configuration has implemented for the homogeneous interaction of the water vapor molecule with a maximum active sensor-surface area. The electronics with the digital display unit was designed and developed to represent the relative humidity in the form of digital display.
| Item Type: | Article |
|---|---|
| Additional Information: | Copyright for this article belongs to M/s Elsevier. |
| Subjects: | Engineering > Electronics and Electrical Engineering Instruments/ Instrumentation |
| Divisions: | UNSPECIFIED |
| Depositing User: | Mr. Yogesh Joshi |
| Date Deposited: | 19 Aug 2026 11:46 |
| Last Modified: | 19 Aug 2026 11:46 |
| URI: | https://npl.csircentral.net/id/eprint/4377 |
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