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Proceedings 2017, 1(4), 408; doi:10.3390/proceedings1040408

MgO-Doped (Zr,Sr)TiO3 Perovskite Humidity Sensors: Microstructural Effects on Water Permeation

Freiburg Materials Research Centre, FMF, University of Freiburg, Stefan-Meier-Str. 21, 79104 Freiburg, Germany
Laboratory for Sensors, Department of Microsystems Engineering, IMTEK, University of Freiburg, Georges-Koehler-Allee 103, 79110 Freiburg, Germany
Department of Electrical and Electronic Engineering, Faculty of Engineering, University Putra Malaysia, UPM, Serdang, Selangor 43400, Malaysia
Presented at the Eurosensors 2017 Conference, Paris, France, 3–6 September 2017.
Author to whom correspondence should be addressed.
Published: 8 August 2017
(This article belongs to the Proceedings of Eurosensors 2017)
Download PDF [989 KB, uploaded 4 September 2017]


Porous (Zr0.5,Sr0.5)TiO3 and MgO (1, 3, 5 mol%) doped ZST nanocomposites have been developed and investigated as humidity sensing elements. The surface area analyser and FESEM data have indicated that the MgO doped perovskites are contained of the macropores and grain size of about 77 to 87 nm. EFTEM proved the reduction of particle size by addition of MgO dopant concentration. While pure ZST shows BET surface area of about 58 m2/g, MgO doped samples exhibit about 12 m2/g. Sensor contained of ZST doped with 3 mol% MgO shows highest sensitivity with about four orders of magnitude change in impedance within the range of 20% to 95% RH.
Keywords: humidity sensors; perovskite materials; thick film; nanocomposites; ceramic; zirconium humidity sensors; perovskite materials; thick film; nanocomposites; ceramic; zirconium
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Farahani, H.; Wagiran, R.; Urban, G. MgO-Doped (Zr,Sr)TiO3 Perovskite Humidity Sensors: Microstructural Effects on Water Permeation. Proceedings 2017, 1, 408.

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