Enhanced PTCR characteristics of 0.95BaTiO 3 -0.05(Bi 0.5 Na 0.5 )TiO 3 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

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

0.95BaTiO 3 -0.05(Bi 0.5 Na 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 ) TiO 3 -rich BaTi O 3 (Bi 0.5 Na 0.5 ) Ti O 3 intermediate composition in the additional step. For the specimen with the intermediate step composition of 0.94 (Bi 0.5 Na 0.5 ) Ti O 3 -0.06BaTi O 3 , 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× 10 4 , temperature coefficient of resistivity of 41%/°C, and low resistivity at room temperature of 1.6× 10 2 cm caused by its large grain boundary volume compared to the specimen fabricated by the normal synthesis process.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume158
Issue number2
DOIs
Publication statusPublished - 2011 Jan 5

Fingerprint

Positive temperature coefficient
Chemical analysis
Grain boundaries
Sintering
Temperature
Liquids

All Science Journal Classification (ASJC) codes

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

Cite this

Jeong, Young Hun ; Kim, Chul Min ; Kim, Chang Il ; Cho, Yong Soo ; Lee, Young Jin ; Paik, Jong Hoo ; Lee, Wu Young ; Kim, Dae Jun. / Enhanced PTCR characteristics of 0.95BaTiO 3 -0.05(Bi 0.5 Na 0.5 )TiO 3 ceramics fabricated by modified synthesis process In: Journal of the Electrochemical Society. 2011 ; Vol. 158, No. 2.
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title = "Enhanced PTCR characteristics of 0.95BaTiO 3 -0.05(Bi 0.5 Na 0.5 )TiO 3 ceramics fabricated by modified synthesis process",
abstract = "0.95BaTiO 3 -0.05(Bi 0.5 Na 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 ) TiO 3 -rich BaTi O 3 (Bi 0.5 Na 0.5 ) Ti O 3 intermediate composition in the additional step. For the specimen with the intermediate step composition of 0.94 (Bi 0.5 Na 0.5 ) Ti O 3 -0.06BaTi O 3 , 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× 10 4 , temperature coefficient of resistivity of 41{\%}/°C, and low resistivity at room temperature of 1.6× 10 2 cm 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 0.95BaTiO 3 -0.05(Bi 0.5 Na 0.5 )TiO 3 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, 05.01.2011.

Research output: Contribution to journalArticle

TY - JOUR

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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 - 2011/1/5

Y1 - 2011/1/5

N2 - 0.95BaTiO 3 -0.05(Bi 0.5 Na 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 ) TiO 3 -rich BaTi O 3 (Bi 0.5 Na 0.5 ) Ti O 3 intermediate composition in the additional step. For the specimen with the intermediate step composition of 0.94 (Bi 0.5 Na 0.5 ) Ti O 3 -0.06BaTi O 3 , 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× 10 4 , temperature coefficient of resistivity of 41%/°C, and low resistivity at room temperature of 1.6× 10 2 cm caused by its large grain boundary volume compared to the specimen fabricated by the normal synthesis process.

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