Dielectric relaxation and conductivity in lead-free sodium bismuth titanate ceramics

Dhananjay K. Sharma; Raju Kumar; Seema Sharma; Radheshyam Rai; Anderi L. Kholkin

doi:10.1109/ISAF.2011.6013979

Dielectric relaxation and conductivity in lead-free sodium bismuth titanate ceramics

Dhananjay K. Sharma^*
, Raju Kumar
, Seema Sharma
, Radheshyam Rai
, Anderi L. Kholkin

^*Corresponding author for this work

A.N. College
University of Aveiro

Research output: Chapter in Book/Report/Conference proceeding › Conference paper › Research › peer-review

2 Citations (Scopus)

Abstract

Perovskite structured Na_0.5Bi_0.5TiO₃ (NBT) ceramics were synthesized by the solid-state sintering method. The presence of constituent phases and crystalline structure of the system was confirmed by X-ray diffraction technique exhibiting perovskite structure with rhombohedral symmetry. The dielectric behavior showed a broad peak at ∼400°C characterized as Curie temperature. The real part of impedance (Z′) as a function of frequency has higher values at lower frequencies and decreases up to 20 kHz and attains a constant value beyond that frequency. The broadening of peaks in frequency explicit plots of imaginary part of impedance (Z″) suggests that there is a spread of relaxation times, which involves more than two equilibrium portions. The purpose of giving dielectric data obtained from the impedance studies is to give the usefulness of the impedance formalism to evaluate the dielectric behavior in the present sample. The Nyquist plot and conductivity studies showed the NTCR character of NBT ceramic samples.

Original language	English
Title of host publication	2011 International Symposium on Applications of Ferroelectrics and 2011 International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials, ISAF/PFM 2011
DOIs	https://doi.org/10.1109/ISAF.2011.6013979
Publication status	Published - 2011
Externally published	Yes
Event	2011 International Symposium on Applications of Ferroelectrics and 2011 International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials, ISAF/PFM 2011 - Vancouver, BC, Canada Duration: 24 Jul 2011 → 27 Jul 2011

Publication series

Name	2011 International Symposium on Applications of Ferroelectrics and 2011 International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials, ISAF/PFM 2011

Conference

Conference	2011 International Symposium on Applications of Ferroelectrics and 2011 International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials, ISAF/PFM 2011
Country/Territory	Canada
City	Vancouver, BC
Period	24/07/11 → 27/07/11

Keywords

Curie temperature
dielectric relaxation
impedance
NBT
Perovskite

Access to Document

10.1109/ISAF.2011.6013979

Cite this

Sharma, D. K., Kumar, R., Sharma, S., Rai, R., & Kholkin, A. L. (2011). Dielectric relaxation and conductivity in lead-free sodium bismuth titanate ceramics. In 2011 International Symposium on Applications of Ferroelectrics and 2011 International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials, ISAF/PFM 2011 Article 6013979 (2011 International Symposium on Applications of Ferroelectrics and 2011 International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials, ISAF/PFM 2011). https://doi.org/10.1109/ISAF.2011.6013979

Sharma, Dhananjay K. ; Kumar, Raju ; Sharma, Seema et al. / Dielectric relaxation and conductivity in lead-free sodium bismuth titanate ceramics. 2011 International Symposium on Applications of Ferroelectrics and 2011 International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials, ISAF/PFM 2011. 2011. (2011 International Symposium on Applications of Ferroelectrics and 2011 International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials, ISAF/PFM 2011).

@inproceedings{bbc55e0d0baa41b69b5453960ceeca1e,

title = "Dielectric relaxation and conductivity in lead-free sodium bismuth titanate ceramics",

abstract = "Perovskite structured Na0.5Bi0.5TiO3 (NBT) ceramics were synthesized by the solid-state sintering method. The presence of constituent phases and crystalline structure of the system was confirmed by X-ray diffraction technique exhibiting perovskite structure with rhombohedral symmetry. The dielectric behavior showed a broad peak at ∼400°C characterized as Curie temperature. The real part of impedance (Z′) as a function of frequency has higher values at lower frequencies and decreases up to 20 kHz and attains a constant value beyond that frequency. The broadening of peaks in frequency explicit plots of imaginary part of impedance (Z″) suggests that there is a spread of relaxation times, which involves more than two equilibrium portions. The purpose of giving dielectric data obtained from the impedance studies is to give the usefulness of the impedance formalism to evaluate the dielectric behavior in the present sample. The Nyquist plot and conductivity studies showed the NTCR character of NBT ceramic samples.",

keywords = "Curie temperature, dielectric relaxation, impedance, NBT, Perovskite",

author = "Sharma, \{Dhananjay K.\} and Raju Kumar and Seema Sharma and Radheshyam Rai and Kholkin, \{Anderi L.\}",

year = "2011",

doi = "10.1109/ISAF.2011.6013979",

language = "English",

isbn = "9781457711626",

series = "2011 International Symposium on Applications of Ferroelectrics and 2011 International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials, ISAF/PFM 2011",

booktitle = "2011 International Symposium on Applications of Ferroelectrics and 2011 International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials, ISAF/PFM 2011",

note = "2011 International Symposium on Applications of Ferroelectrics and 2011 International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials, ISAF/PFM 2011 ; Conference date: 24-07-2011 Through 27-07-2011",

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Sharma, DK, Kumar, R, Sharma, S, Rai, R & Kholkin, AL 2011, Dielectric relaxation and conductivity in lead-free sodium bismuth titanate ceramics. in 2011 International Symposium on Applications of Ferroelectrics and 2011 International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials, ISAF/PFM 2011., 6013979, 2011 International Symposium on Applications of Ferroelectrics and 2011 International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials, ISAF/PFM 2011, 2011 International Symposium on Applications of Ferroelectrics and 2011 International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials, ISAF/PFM 2011, Vancouver, BC, Canada, 24/07/11. https://doi.org/10.1109/ISAF.2011.6013979

Dielectric relaxation and conductivity in lead-free sodium bismuth titanate ceramics. / Sharma, Dhananjay K.; Kumar, Raju; Sharma, Seema et al.
2011 International Symposium on Applications of Ferroelectrics and 2011 International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials, ISAF/PFM 2011. 2011. 6013979 (2011 International Symposium on Applications of Ferroelectrics and 2011 International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials, ISAF/PFM 2011).

Research output: Chapter in Book/Report/Conference proceeding › Conference paper › Research › peer-review

TY - GEN

T1 - Dielectric relaxation and conductivity in lead-free sodium bismuth titanate ceramics

AU - Sharma, Dhananjay K.

AU - Kumar, Raju

AU - Sharma, Seema

AU - Rai, Radheshyam

AU - Kholkin, Anderi L.

PY - 2011

Y1 - 2011

N2 - Perovskite structured Na0.5Bi0.5TiO3 (NBT) ceramics were synthesized by the solid-state sintering method. The presence of constituent phases and crystalline structure of the system was confirmed by X-ray diffraction technique exhibiting perovskite structure with rhombohedral symmetry. The dielectric behavior showed a broad peak at ∼400°C characterized as Curie temperature. The real part of impedance (Z′) as a function of frequency has higher values at lower frequencies and decreases up to 20 kHz and attains a constant value beyond that frequency. The broadening of peaks in frequency explicit plots of imaginary part of impedance (Z″) suggests that there is a spread of relaxation times, which involves more than two equilibrium portions. The purpose of giving dielectric data obtained from the impedance studies is to give the usefulness of the impedance formalism to evaluate the dielectric behavior in the present sample. The Nyquist plot and conductivity studies showed the NTCR character of NBT ceramic samples.

AB - Perovskite structured Na0.5Bi0.5TiO3 (NBT) ceramics were synthesized by the solid-state sintering method. The presence of constituent phases and crystalline structure of the system was confirmed by X-ray diffraction technique exhibiting perovskite structure with rhombohedral symmetry. The dielectric behavior showed a broad peak at ∼400°C characterized as Curie temperature. The real part of impedance (Z′) as a function of frequency has higher values at lower frequencies and decreases up to 20 kHz and attains a constant value beyond that frequency. The broadening of peaks in frequency explicit plots of imaginary part of impedance (Z″) suggests that there is a spread of relaxation times, which involves more than two equilibrium portions. The purpose of giving dielectric data obtained from the impedance studies is to give the usefulness of the impedance formalism to evaluate the dielectric behavior in the present sample. The Nyquist plot and conductivity studies showed the NTCR character of NBT ceramic samples.

KW - Curie temperature

KW - dielectric relaxation

KW - impedance

KW - NBT

KW - Perovskite

UR - https://www.scopus.com/pages/publications/80053370178

U2 - 10.1109/ISAF.2011.6013979

DO - 10.1109/ISAF.2011.6013979

M3 - Conference paper

AN - SCOPUS:80053370178

SN - 9781457711626

T3 - 2011 International Symposium on Applications of Ferroelectrics and 2011 International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials, ISAF/PFM 2011

BT - 2011 International Symposium on Applications of Ferroelectrics and 2011 International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials, ISAF/PFM 2011

T2 - 2011 International Symposium on Applications of Ferroelectrics and 2011 International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials, ISAF/PFM 2011

Y2 - 24 July 2011 through 27 July 2011

ER -

Sharma DK, Kumar R, Sharma S, Rai R, Kholkin AL. Dielectric relaxation and conductivity in lead-free sodium bismuth titanate ceramics. In 2011 International Symposium on Applications of Ferroelectrics and 2011 International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials, ISAF/PFM 2011. 2011. 6013979. (2011 International Symposium on Applications of Ferroelectrics and 2011 International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials, ISAF/PFM 2011). doi: 10.1109/ISAF.2011.6013979

Dielectric relaxation and conductivity in lead-free sodium bismuth titanate ceramics

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