Enhanced PTCR characteristics of 0.95BaTiO3-0.05(Bi 0.5Na0.5)TiO3 ceramics fabricated by modified synthesis process

Young Hun Jeong; Chul Min Kim; Chang Il Kim; Yong Soo Cho; Young Jin Lee; Jong Hoo Paik; Wu Young Lee; Dae Jun Kim

doi:10.1149/1.3514599

Enhanced PTCR characteristics of 0.95BaTiO₃-0.05(Bi _0.5Na_0.5)TiO₃ ceramics fabricated by modified synthesis process

Young Hun Jeong, Chul Min Kim, Chang Il Kim, Yong Soo Cho, Young Jin Lee, Jong Hoo Paik, Wu Young Lee, Dae Jun Kim

Department of Materials Science and Engineering

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

7 Citations (Scopus)

Abstract

0.95BaTiO₃-0.05(Bi_0.5Na_0.5) Ti O ₃ ceramics with a positive temperature coefficient of resistivity (PTCR) were fabricated by a modified synthesis process. Their structural and PTCR characteristics were investigated by varying the (Bi_0.5 Na _0.5) TiO₃-rich BaTi O₃ (Bi_0.5 Na_0.5) Ti O₃ intermediate composition in the additional step. For the specimen with the intermediate step composition of 0.94 (Bi _0.5 Na_0.5) Ti O₃-0.06BaTi O₃, abnormally large grains grew with the aid of the liquid phase that developed due to the volatile Bi during sintering at 1300°C. Especially, it showed enhanced PTCR characteristics with a PTCR jump of 1.1× 10⁴, temperature coefficient of resistivity of 41%/°C, and low resistivity at room temperature of 1.6× 10²cm caused by its large grain boundary volume compared to the specimen fabricated by the normal synthesis process.

Original language	English
Pages (from-to)	J27-J31
Journal	Journal of the Electrochemical Society
Volume	158
Issue number	2
DOIs	https://doi.org/10.1149/1.3514599
Publication status	Published - 2011

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Renewable Energy, Sustainability and the Environment
Surfaces, Coatings and Films
Electrochemistry
Materials Chemistry

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@article{2789573ede524c7db81a6bfcc1ef8ef3,

title = "Enhanced PTCR characteristics of 0.95BaTiO3-0.05(Bi 0.5Na0.5)TiO3 ceramics fabricated by modified synthesis process",

abstract = "0.95BaTiO3-0.05(Bi0.5Na0.5) Ti O 3 ceramics with a positive temperature coefficient of resistivity (PTCR) were fabricated by a modified synthesis process. Their structural and PTCR characteristics were investigated by varying the (Bi0.5 Na 0.5) TiO3-rich BaTi O3 (Bi0.5 Na0.5) Ti O3 intermediate composition in the additional step. For the specimen with the intermediate step composition of 0.94 (Bi 0.5 Na0.5) Ti O3-0.06BaTi O3, abnormally large grains grew with the aid of the liquid phase that developed due to the volatile Bi during sintering at 1300°C. Especially, it showed enhanced PTCR characteristics with a PTCR jump of 1.1× 104, temperature coefficient of resistivity of 41%/°C, and low resistivity at room temperature of 1.6× 102cm caused by its large grain boundary volume compared to the specimen fabricated by the normal synthesis process.",

author = "Jeong, {Young Hun} and Kim, {Chul Min} and Kim, {Chang Il} and Cho, {Yong Soo} and Lee, {Young Jin} and Paik, {Jong Hoo} and Lee, {Wu Young} and Kim, {Dae Jun}",

year = "2011",

doi = "10.1149/1.3514599",

language = "English",

volume = "158",

pages = "J27--J31",

journal = "Journal of the Electrochemical Society",

issn = "0013-4651",

publisher = "Electrochemical Society, Inc.",

number = "2",

}

Enhanced PTCR characteristics of 0.95BaTiO₃-0.05(Bi _0.5Na_0.5)TiO₃ ceramics fabricated by modified synthesis process. / Jeong, Young Hun; Kim, Chul Min; Kim, Chang Il; Cho, Yong Soo; Lee, Young Jin; Paik, Jong Hoo; Lee, Wu Young; Kim, Dae Jun.

In: Journal of the Electrochemical Society, Vol. 158, No. 2, 2011, p. J27-J31.

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

TY - JOUR

T1 - Enhanced PTCR characteristics of 0.95BaTiO3-0.05(Bi 0.5Na0.5)TiO3 ceramics fabricated by modified synthesis process

AU - Jeong, Young Hun

AU - Kim, Chul Min

AU - Kim, Chang Il

AU - Cho, Yong Soo

AU - Lee, Young Jin

AU - Paik, Jong Hoo

AU - Lee, Wu Young

AU - Kim, Dae Jun

PY - 2011

Y1 - 2011

N2 - 0.95BaTiO3-0.05(Bi0.5Na0.5) Ti O 3 ceramics with a positive temperature coefficient of resistivity (PTCR) were fabricated by a modified synthesis process. Their structural and PTCR characteristics were investigated by varying the (Bi0.5 Na 0.5) TiO3-rich BaTi O3 (Bi0.5 Na0.5) Ti O3 intermediate composition in the additional step. For the specimen with the intermediate step composition of 0.94 (Bi 0.5 Na0.5) Ti O3-0.06BaTi O3, abnormally large grains grew with the aid of the liquid phase that developed due to the volatile Bi during sintering at 1300°C. Especially, it showed enhanced PTCR characteristics with a PTCR jump of 1.1× 104, temperature coefficient of resistivity of 41%/°C, and low resistivity at room temperature of 1.6× 102cm caused by its large grain boundary volume compared to the specimen fabricated by the normal synthesis process.

AB - 0.95BaTiO3-0.05(Bi0.5Na0.5) Ti O 3 ceramics with a positive temperature coefficient of resistivity (PTCR) were fabricated by a modified synthesis process. Their structural and PTCR characteristics were investigated by varying the (Bi0.5 Na 0.5) TiO3-rich BaTi O3 (Bi0.5 Na0.5) Ti O3 intermediate composition in the additional step. For the specimen with the intermediate step composition of 0.94 (Bi 0.5 Na0.5) Ti O3-0.06BaTi O3, abnormally large grains grew with the aid of the liquid phase that developed due to the volatile Bi during sintering at 1300°C. Especially, it showed enhanced PTCR characteristics with a PTCR jump of 1.1× 104, temperature coefficient of resistivity of 41%/°C, and low resistivity at room temperature of 1.6× 102cm caused by its large grain boundary volume compared to the specimen fabricated by the normal synthesis process.

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Enhanced PTCR characteristics of 0.95BaTiO₃-0.05(Bi _0.5Na_0.5)TiO₃ ceramics fabricated by modified synthesis process

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