Complex impedance analyses of high Tc BaTiO3-based Pb-free PTCR ceramics

Ping Hua Xiang; Hiroaki Tareda; Tadashi Shiosaki

doi:10.1109/ISAF.2007.4393411

Complex impedance analyses of high T_c BaTiO₃-based Pb-free PTCR ceramics

Ping Hua Xiang, Hiroaki Tareda, Tadashi Shiosaki

Nara Institute of Science and Technology

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

Abstract

A distinct positive temperature coefficient of resistance (PTCR) effect has been observed in Bi_0.5Na_0.5TiO₃ (BNT)-added BaTiO₃ (BT) ceramics sintered in N₂ flow with a low O ₂ concentration . With the addition of 10 mol.% BNT, the samples exhibited resistivity jumps of above 10³ at 189 °C. The BNT-added BT ceramics was also analyzed using an a.c. complex impedance spectroscopy to reveal the origin of the PTCR effect. An electrically inhomogeneous microstructure of the grain interiors, surface layers surrounding the gains and grain boundaries were deduced by the complex impedance analyses. The observed d.c. resistivity increase was mainly due to the increase in grain boundary resistivity. The surface layer appeared to slightly contribute to the PTCR effect in the BNT-added BT ceramics. The grain interior also exhibited a resistivity anomaly around T_s. But, the resistivity of gain interior decreased with temperature higher than T_s.

Original language	English
Title of host publication	2007 16th IEEE International Symposium on the Applications of Ferroelectrics, ISAF
Pages	815-817
Number of pages	3
DOIs	https://doi.org/10.1109/ISAF.2007.4393411
State	Published - 2007
Externally published	Yes
Event	2007 16th IEEE International Symposium on the Applications of Ferroelectrics, ISAF - Nara-city, Japan Duration: 27 May 2007 → 31 May 2007

Publication series

Name	IEEE International Symposium on Applications of Ferroelectrics

Conference

Conference	2007 16th IEEE International Symposium on the Applications of Ferroelectrics, ISAF
Country/Territory	Japan
City	Nara-city
Period	27/05/07 → 31/05/07

Access to Document

10.1109/ISAF.2007.4393411

Cite this

@inproceedings{e9def78e06524401be99f280ad82228e,

title = "Complex impedance analyses of high Tc BaTiO3-based Pb-free PTCR ceramics",

abstract = "A distinct positive temperature coefficient of resistance (PTCR) effect has been observed in Bi0.5Na0.5TiO3 (BNT)-added BaTiO3 (BT) ceramics sintered in N2 flow with a low O 2 concentration . With the addition of 10 mol.\% BNT, the samples exhibited resistivity jumps of above 103 at 189 °C. The BNT-added BT ceramics was also analyzed using an a.c. complex impedance spectroscopy to reveal the origin of the PTCR effect. An electrically inhomogeneous microstructure of the grain interiors, surface layers surrounding the gains and grain boundaries were deduced by the complex impedance analyses. The observed d.c. resistivity increase was mainly due to the increase in grain boundary resistivity. The surface layer appeared to slightly contribute to the PTCR effect in the BNT-added BT ceramics. The grain interior also exhibited a resistivity anomaly around Ts. But, the resistivity of gain interior decreased with temperature higher than Ts.",

author = "Xiang, \{Ping Hua\} and Hiroaki Tareda and Tadashi Shiosaki",

year = "2007",

doi = "10.1109/ISAF.2007.4393411",

language = "英语",

isbn = "1424413338",

series = "IEEE International Symposium on Applications of Ferroelectrics",

pages = "815--817",

booktitle = "2007 16th IEEE International Symposium on the Applications of Ferroelectrics, ISAF",

note = "2007 16th IEEE International Symposium on the Applications of Ferroelectrics, ISAF ; Conference date: 27-05-2007 Through 31-05-2007",

}

Xiang, PH, Tareda, H & Shiosaki, T 2007, Complex impedance analyses of high T_c BaTiO₃-based Pb-free PTCR ceramics. in 2007 16th IEEE International Symposium on the Applications of Ferroelectrics, ISAF., 4393411, IEEE International Symposium on Applications of Ferroelectrics, pp. 815-817, 2007 16th IEEE International Symposium on the Applications of Ferroelectrics, ISAF, Nara-city, Japan, 27/05/07. https://doi.org/10.1109/ISAF.2007.4393411

Complex impedance analyses of high T_c BaTiO₃-based Pb-free PTCR ceramics. / Xiang, Ping Hua; Tareda, Hiroaki; Shiosaki, Tadashi.
2007 16th IEEE International Symposium on the Applications of Ferroelectrics, ISAF. 2007. p. 815-817 4393411 (IEEE International Symposium on Applications of Ferroelectrics).

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

TY - GEN

T1 - Complex impedance analyses of high Tc BaTiO3-based Pb-free PTCR ceramics

AU - Xiang, Ping Hua

AU - Tareda, Hiroaki

AU - Shiosaki, Tadashi

PY - 2007

Y1 - 2007

N2 - A distinct positive temperature coefficient of resistance (PTCR) effect has been observed in Bi0.5Na0.5TiO3 (BNT)-added BaTiO3 (BT) ceramics sintered in N2 flow with a low O 2 concentration . With the addition of 10 mol.% BNT, the samples exhibited resistivity jumps of above 103 at 189 °C. The BNT-added BT ceramics was also analyzed using an a.c. complex impedance spectroscopy to reveal the origin of the PTCR effect. An electrically inhomogeneous microstructure of the grain interiors, surface layers surrounding the gains and grain boundaries were deduced by the complex impedance analyses. The observed d.c. resistivity increase was mainly due to the increase in grain boundary resistivity. The surface layer appeared to slightly contribute to the PTCR effect in the BNT-added BT ceramics. The grain interior also exhibited a resistivity anomaly around Ts. But, the resistivity of gain interior decreased with temperature higher than Ts.

AB - A distinct positive temperature coefficient of resistance (PTCR) effect has been observed in Bi0.5Na0.5TiO3 (BNT)-added BaTiO3 (BT) ceramics sintered in N2 flow with a low O 2 concentration . With the addition of 10 mol.% BNT, the samples exhibited resistivity jumps of above 103 at 189 °C. The BNT-added BT ceramics was also analyzed using an a.c. complex impedance spectroscopy to reveal the origin of the PTCR effect. An electrically inhomogeneous microstructure of the grain interiors, surface layers surrounding the gains and grain boundaries were deduced by the complex impedance analyses. The observed d.c. resistivity increase was mainly due to the increase in grain boundary resistivity. The surface layer appeared to slightly contribute to the PTCR effect in the BNT-added BT ceramics. The grain interior also exhibited a resistivity anomaly around Ts. But, the resistivity of gain interior decreased with temperature higher than Ts.

UR - https://www.scopus.com/pages/publications/51349132786

U2 - 10.1109/ISAF.2007.4393411

DO - 10.1109/ISAF.2007.4393411

M3 - 会议稿件

AN - SCOPUS:51349132786

SN - 1424413338

SN - 9781424413331

T3 - IEEE International Symposium on Applications of Ferroelectrics

SP - 815

EP - 817

BT - 2007 16th IEEE International Symposium on the Applications of Ferroelectrics, ISAF

T2 - 2007 16th IEEE International Symposium on the Applications of Ferroelectrics, ISAF

Y2 - 27 May 2007 through 31 May 2007

ER -