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Effect of external electric field on the microstructural evolution of La2O3-doped BaTiO3 ceramics

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Authors

Jin, Hong-Ri; Yoon, Seok-Hyun; Lee, Jong-Heun; Hwang, Nong M.; Kim, Doh-Yeon; Han, Joo-Hwan

Issue Date
2022-01
Publisher
Hanser Publishers
Citation
International Journal of Materials Research, Vol.96 No.2, pp.167-171
Abstract
The grain growth behavior of La-doped BaTiO3 specimens was investigated at 1350 degrees C under DC external electric field. In air atmosphere, grain growth was enhanced at the positive-biased region for the 0.15 mol% La-doped and 0.3 mol% La-doped specimens, while it was enhanced at the negative-biased region for the 1.0 mol% La-doped specimen. For the 0.6 mol% La-doped specimen, on the other hand, both positive- and negative-biased regions showed the same grain size. The demarcation donor composition (0.6 mol% La) shifted to a higher donor concentration when the specimen was heat-treated in nitrogen. The results were explained in terms of the grain boundary potential and its variation with donor concentration, oxygen partial pressure, and defect polarization.
ISSN
1862-5282
URI
https://hdl.handle.net/10371/179440
DOI
https://doi.org/10.3139/ijmr-2005-0029
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Materials Science and Engineering (재료공학부)Journal Papers (저널논문_재료공학부)
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