Structural refinement and impedance spectroscopy of lead-free (K,Na) (Nb)O3-xBiErO3 piezoelectric ceramics

Muhammad Qadeer Awan; A. R. Makhdoom; Javed Ahmad; Sana Ullah Asif; Lasse Norén; Wanbiao Hu; Yun Liu

doi:10.1016/j.physb.2019.411949

Structural refinement and impedance spectroscopy of lead-free (K,Na) (Nb)O₃-xBiErO₃ piezoelectric ceramics

Muhammad Qadeer Awan^*, A. R. Makhdoom, Javed Ahmad, Sana Ullah Asif, Lasse Norén, Wanbiao Hu, Yun Liu

^*Corresponding author for this work

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

3 Citations (Scopus)

Abstract

The structural and electric transport properties of BiErO₃-(KNa)NbO₃ composite ceramics were investigated in this study. The structural changes have been studied quantitatively through refinement techniques around the phase transition. The presence of binary phase regions was depicted through Le-Bail and Rietveld refinement techniques in the compositional range x = 0.5–1.0%. Electrical transport properties of (K,Na) (Nb)O₃-xBiErO₃ for all compositional range were probed at room temperature. The influence of grains and grain boundaries was perceived on electrical properties by employing impedance spectroscopy (IS) in the frequency range from 20 Hz to 2 MHz for given samples. The ceramic samples presented non-Debye type relaxation phenomenon in impedance spectroscopic plots, trailed by thermally activated process, may be correlated to hopping phenomena.

Original language	English
Article number	411949
Journal	Physica B: Condensed Matter
Volume	581
DOIs	https://doi.org/10.1016/j.physb.2019.411949
Publication status	Published - 15 Mar 2020

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title = "Structural refinement and impedance spectroscopy of lead-free (K,Na) (Nb)O3-xBiErO3 piezoelectric ceramics",

abstract = "The structural and electric transport properties of BiErO3-(KNa)NbO3 composite ceramics were investigated in this study. The structural changes have been studied quantitatively through refinement techniques around the phase transition. The presence of binary phase regions was depicted through Le-Bail and Rietveld refinement techniques in the compositional range x = 0.5–1.0%. Electrical transport properties of (K,Na) (Nb)O3-xBiErO3 for all compositional range were probed at room temperature. The influence of grains and grain boundaries was perceived on electrical properties by employing impedance spectroscopy (IS) in the frequency range from 20 Hz to 2 MHz for given samples. The ceramic samples presented non-Debye type relaxation phenomenon in impedance spectroscopic plots, trailed by thermally activated process, may be correlated to hopping phenomena.",

keywords = "Electrical transport properties, Hopping phenomena, Impedance spectroscopy, KNN-based system, Le-Bail and Rietveld refinement, Space charge polarization",

author = "Awan, {Muhammad Qadeer} and Makhdoom, {A. R.} and Javed Ahmad and Asif, {Sana Ullah} and Lasse Nor{\'e}n and Wanbiao Hu and Yun Liu",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

year = "2020",

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doi = "10.1016/j.physb.2019.411949",

language = "English",

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T1 - Structural refinement and impedance spectroscopy of lead-free (K,Na) (Nb)O3-xBiErO3 piezoelectric ceramics

AU - Awan, Muhammad Qadeer

AU - Makhdoom, A. R.

AU - Ahmad, Javed

AU - Asif, Sana Ullah

AU - Norén, Lasse

AU - Hu, Wanbiao

AU - Liu, Yun

PY - 2020/3/15

Y1 - 2020/3/15

N2 - The structural and electric transport properties of BiErO3-(KNa)NbO3 composite ceramics were investigated in this study. The structural changes have been studied quantitatively through refinement techniques around the phase transition. The presence of binary phase regions was depicted through Le-Bail and Rietveld refinement techniques in the compositional range x = 0.5–1.0%. Electrical transport properties of (K,Na) (Nb)O3-xBiErO3 for all compositional range were probed at room temperature. The influence of grains and grain boundaries was perceived on electrical properties by employing impedance spectroscopy (IS) in the frequency range from 20 Hz to 2 MHz for given samples. The ceramic samples presented non-Debye type relaxation phenomenon in impedance spectroscopic plots, trailed by thermally activated process, may be correlated to hopping phenomena.

AB - The structural and electric transport properties of BiErO3-(KNa)NbO3 composite ceramics were investigated in this study. The structural changes have been studied quantitatively through refinement techniques around the phase transition. The presence of binary phase regions was depicted through Le-Bail and Rietveld refinement techniques in the compositional range x = 0.5–1.0%. Electrical transport properties of (K,Na) (Nb)O3-xBiErO3 for all compositional range were probed at room temperature. The influence of grains and grain boundaries was perceived on electrical properties by employing impedance spectroscopy (IS) in the frequency range from 20 Hz to 2 MHz for given samples. The ceramic samples presented non-Debye type relaxation phenomenon in impedance spectroscopic plots, trailed by thermally activated process, may be correlated to hopping phenomena.

KW - Electrical transport properties

KW - Hopping phenomena

KW - Impedance spectroscopy

KW - KNN-based system

KW - Le-Bail and Rietveld refinement

KW - Space charge polarization

UR - http://www.scopus.com/inward/record.url?scp=85076715678&partnerID=8YFLogxK

U2 - 10.1016/j.physb.2019.411949

DO - 10.1016/j.physb.2019.411949

M3 - Article

SN - 0921-4526

VL - 581

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

M1 - 411949

ER -

Structural refinement and impedance spectroscopy of lead-free (K,Na) (Nb)O₃-xBiErO₃ piezoelectric ceramics

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