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 language | English |
|---|---|
| Journal | Journal of the Electrochemical Society |
| Volume | 158 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2011 Jan 5 |
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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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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 journal › Article
TY - JOUR
T1 - Enhanced PTCR characteristics of 0.95BaTiO 3 -0.05(Bi 0.5 Na 0.5 )TiO 3 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 - 2011/1/5
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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=78650740972&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78650740972&partnerID=8YFLogxK
U2 - 10.1149/1.3514599
DO - 10.1149/1.3514599
M3 - Article
AN - SCOPUS:78650740972
VL - 158
JO - Journal of the Electrochemical Society
JF - Journal of the Electrochemical Society
SN - 0013-4651
IS - 2
ER -