Microstructural studies of AgNbO3 ceramic by using complex impedance spectroscopy

Gangaprasad, K. and Rao, T. Durga and Niranjan, Manish K. and Asthana, Saket (2015) Microstructural studies of AgNbO3 ceramic by using complex impedance spectroscopy. In: 59th DAE Solid State Physics Symposium, SSPS 2014, 16-20 December 2014, VIT UniversityVellore, Tamilnadu; India.

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Lead-free piezoelectric silver niobate ceramic was synthesized by conventional solid state route. Room temperature X-ray diffraction pattern revealed that the sample crystallizes in single phase orthorhombic perovskite structure. Scanning electron micrographs of AgNbO3 ceramic showed that the average grain size is in the range 2-3 μm. The electrical properties were investigated by using impedance spectroscopy. Appearance of single semicircular arc in the Nyquist plot indicated the presence of grain contribution in the sample. Single RC parallel circuit model was employed to extract bulk capacitance (Cb), resistance (Rb) and electrical conductivity (σb). The activation energy calculated from impedance and modulus data indicate that same types of charge carriers (oxygen vacancy movements) are responsible for conduction and relaxation.

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IITH Creators:
IITH CreatorsORCiD
Asthana, Sakethttp://orcid.org/0000-0002-6420-3304
Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Activation energy, AgNbO3 ceramics,Impedance
Subjects: Physics
Physics > Classical mechanics
Physics > Fluid mechanics
Physics > Pneumatics
Physics > Electricity and electronics
Physics > Magnetism
Physics > Modern physics
Physics > Astronomy Astrophysics
Divisions: Department of Physics
Depositing User: . LibTrainee 2021
Date Deposited: 27 May 2021 06:15
Last Modified: 27 May 2021 06:15
URI: http://raiith.iith.ac.in/id/eprint/7844
Publisher URL: http://doi.org/10.1063/1.4918094
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