Investigation of Metal Electrode Effect on Electrical Conductivity of [KNbO3]0.9 – [BaNi0.5Nb0.5O3]0.1 Ceramics by Impedance Spectroscopy

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Published: Dec 30, 2018
Keywords:
KBNNO Metal Electrode Impedance Spectroscopy Equivalent Circuit Model

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Saichon Sriphan
Department of Telecommunication Engineering, Faculty of Engineering and Architecture, Rajamangala University of Technology Isan, Nakhon Ratchasima 30000, Thailand
Naratip Vittayakorn
Advanced Material Research Unit, Faculty of Science, King Mongkut’s Institute of Technology Ladkrabang, Bangkok 10520, Thailand
Mati Horpratum
National Electronics and Computer Technology Center, Thailand Science Park, Pathumthani 12120, Thailand.
Sasiporn Prasertpalichat
Research Center for Academic Excellent in Applied Physics, Faculty of Science, Naresuan University, Phitsanulok 65000, Thailand
Theerachai Bongkarn
Research Center for Academic Excellent in Applied Physics, Faculty of Science, Naresuan University, Phitsanulok 65000, Thailand
Suwit Kiravittaya
Advanced Optical Technology Laboratory, Department of Electrical and Computer Engineering, Faculty of Engineering, Naresuan University, Phitsanulok 65000, Thailand

Abstract

Perovskite ceramic of [KNbO3]0.9 – [BaNi0.5Nb0.5O3] 0.1 (KBNNO) was fabricated using the solid-state combustion technique. KBNNO was sandwiched among different metal electrodes to investigate the electrical conductivity behavior. From the impedance spectroscopy, the dispersion of impedance curves was found with the increase of frequency as well as heating temperature. This observation indicated that KBNNO ceramic exhibits dielectric relaxation phenomenon. The equivalent grain resistance value obtained from the impedance analysis significantly decreased after changing the electrode from indium tin oxide (ITO) to Ag, indicating the influence of active electrode on ceramic conductivity. The possible reason was due to the low resistivity of Ag electrode as compared with ITO. This suggested that the electrical charge would easily transfer to external load. The presented results were essential for making a new route to investigate the electrical properties of KBNNO-based material, and further develop novel electroceramics.

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How to Cite
1.
Sriphan S, Vittayakorn N, Horpratum M, Prasertpalichat S, Bongkarn T, Kiravittaya S. Investigation of Metal Electrode Effect on Electrical Conductivity of [KNbO3]0.9 – [BaNi0.5Nb0.5O3]0.1 Ceramics by Impedance Spectroscopy. Thai J. Nanosci. Nanotechnol. [Internet]. 2018 Dec. 30 [cited 2024 Dec. 27];3(2):7-16. Available from: https://ph05.tci-thaijo.org/index.php/TJNN/article/view/55
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Vol. 3 No. 2 (2018): TJNN
Section
Research Articles
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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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