Properties of Pb0.71k0.145Sm 0.145Nb 2O6 analysed within piezoelectric, dielectric, impedance, electric modulus and conductivity

K. Sambasiva Rao; D. Madhava Prasad; P. Murali Krishna; J. H. Lee

doi:10.1051/epjap:2008026

Properties of Pb_0.71k_0.145Sm _0.145Nb ₂O₆ analysed within piezoelectric, dielectric, impedance, electric modulus and conductivity

K. Sambasiva Rao, D. Madhava Prasad, P. Murali Krishna, J. H. Lee

Andhra University

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

Orthorhombic tungsten bronze PbKSmNbO (where and ) ceramic has been synthesized by the conventional sintering technique. Preliminary X-ray diffractogram analysis of crystal structure showed that a single phase compound has been formed with orthorhombic system. Frequency and temperature dependences of impedance, modulus, conductivity and dielectric permittivity have been performed in the frequency and temperature range 45 Hz-5 MHz and 35-595 °C respectively. Impedance spectroscopy study showed the presence of both bulk and grain boundary effects in the materials. The complex impedance spectra above 440 °C have been fitted by the superposition of two Cole-Cole types of relaxations. The ac conductivity spectrum obeyed the Jonscher's power law. Modulus analysis indicated the possibility of hopping mechanism for electrical process in the system.

Original language	English
Pages (from-to)	229-236
Number of pages	8
Journal	EPJ Applied Physics
Volume	41
Issue number	3
DOIs	https://doi.org/10.1051/epjap:2008026
State	Published - Mar 2008

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title = "Properties of Pb0.71k0.145Sm 0.145Nb 2O6 analysed within piezoelectric, dielectric, impedance, electric modulus and conductivity",

abstract = "Orthorhombic tungsten bronze PbKSmNbO (where and ) ceramic has been synthesized by the conventional sintering technique. Preliminary X-ray diffractogram analysis of crystal structure showed that a single phase compound has been formed with orthorhombic system. Frequency and temperature dependences of impedance, modulus, conductivity and dielectric permittivity have been performed in the frequency and temperature range 45 Hz-5 MHz and 35-595 °C respectively. Impedance spectroscopy study showed the presence of both bulk and grain boundary effects in the materials. The complex impedance spectra above 440 °C have been fitted by the superposition of two Cole-Cole types of relaxations. The ac conductivity spectrum obeyed the Jonscher's power law. Modulus analysis indicated the possibility of hopping mechanism for electrical process in the system.",

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T1 - Properties of Pb0.71k0.145Sm 0.145Nb 2O6 analysed within piezoelectric, dielectric, impedance, electric modulus and conductivity

AU - Rao, K. Sambasiva

AU - Prasad, D. Madhava

AU - Krishna, P. Murali

AU - Lee, J. H.

PY - 2008/3

Y1 - 2008/3

N2 - Orthorhombic tungsten bronze PbKSmNbO (where and ) ceramic has been synthesized by the conventional sintering technique. Preliminary X-ray diffractogram analysis of crystal structure showed that a single phase compound has been formed with orthorhombic system. Frequency and temperature dependences of impedance, modulus, conductivity and dielectric permittivity have been performed in the frequency and temperature range 45 Hz-5 MHz and 35-595 °C respectively. Impedance spectroscopy study showed the presence of both bulk and grain boundary effects in the materials. The complex impedance spectra above 440 °C have been fitted by the superposition of two Cole-Cole types of relaxations. The ac conductivity spectrum obeyed the Jonscher's power law. Modulus analysis indicated the possibility of hopping mechanism for electrical process in the system.

AB - Orthorhombic tungsten bronze PbKSmNbO (where and ) ceramic has been synthesized by the conventional sintering technique. Preliminary X-ray diffractogram analysis of crystal structure showed that a single phase compound has been formed with orthorhombic system. Frequency and temperature dependences of impedance, modulus, conductivity and dielectric permittivity have been performed in the frequency and temperature range 45 Hz-5 MHz and 35-595 °C respectively. Impedance spectroscopy study showed the presence of both bulk and grain boundary effects in the materials. The complex impedance spectra above 440 °C have been fitted by the superposition of two Cole-Cole types of relaxations. The ac conductivity spectrum obeyed the Jonscher's power law. Modulus analysis indicated the possibility of hopping mechanism for electrical process in the system.

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Properties of Pb_0.71k_0.145Sm _0.145Nb ₂O₆ analysed within piezoelectric, dielectric, impedance, electric modulus and conductivity

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