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http://dx.doi.org/10.4313/JKEM.2008.21.3.217

Electrical Properties of Donor-doped BaTiO3 Ceramics by Attrition Milling and Calcination Temperature  

Lee, Jeong-Cheol (요업(세라믹)기술원 첨단소재부품팀)
Myong, Seong-Jae (요업(세라믹)기술원 첨단소재부품팀)
Chun, Myoung-Pyo (요업(세라믹)기술원 첨단소재부품팀)
Cho, Jeong-Ho (요업(세라믹)기술원 첨단소재부품팀)
Kim, Byung-Ik (요업(세라믹)기술원 첨단소재부품팀)
Shin, Dong-Wook (한양대학교 신소재공학과)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.21, no.3, 2008 , pp. 217-221 More about this Journal
Abstract
In this study, We have been investigated the effect of calcination temperature and high-energy ball-milling of powder influences the $BaTiO_3$-based PTCR(Positive Temperature coefficient Resistance) characteristics and microstructure. The mixed powder was obtained from $BaCO_3$, $TiO_2$, $CeO_2$ ball-milled in attrition mill. The mixed powder was calcine from 1000 $^{\circ}C$ to 1200 $^{\circ}C$ in air and then it was sintered in reduction- re-oxidation atmosphere. As a result, The room-temperature electrical resistivity decreased and increased with increasing calcination temperature. specially, Attrition milled powder could have low room-temperature resistivity and high PTC jump order at 1100 $^{\circ}C$. attrition milling had lower room-temperature resistivity than ball milling. Particle size decreased by Attrition milling of powder influences in calcination temperature and room-temperature resistivity.
Keywords
$BaTiO_3$; Electrical properties; PTCR(Positive temperature coefficient resistance); Calcination temperature; Attrition milling;
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