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

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

Research output: Contribution to journalArticle

Abstract

The grain growth behavior of La-doped BaTiO3specimens was investigated at 1350°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.

Original languageEnglish
Pages (from-to)167-171
Number of pages5
JournalZeitschrift fuer Metallkunde/Materials Research and Advanced Techniques
Volume96
Issue number2
Publication statusPublished - 2005 Feb 1

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Microstructural evolution
Grain growth
Electric fields
ceramics
electric fields
Partial pressure
Grain boundaries
Nitrogen
Polarization
Oxygen
Defects
Air
Chemical analysis
partial pressure
grain boundaries
grain size
direct current
nitrogen
atmospheres
heat

Keywords

  • Boundary potential
  • Electric field
  • Grain boundary
  • La-doped BaTiO
  • Microstructural evolution

ASJC Scopus subject areas

  • Metals and Alloys

Cite this

Effect of external electric field on the microstructural evolution of La2O3-doped BaTiO3 ceramics. / Jin, Hong Ri; Yoon, Seok Hyun; Lee, Jong Heun; Hwang, Nong M.; Kim, Doh Yeon; Han, Joo Hwan.

In: Zeitschrift fuer Metallkunde/Materials Research and Advanced Techniques, Vol. 96, No. 2, 01.02.2005, p. 167-171.

Research output: Contribution to journalArticle

Jin, Hong Ri ; Yoon, Seok Hyun ; Lee, Jong Heun ; Hwang, Nong M. ; Kim, Doh Yeon ; Han, Joo Hwan. / Effect of external electric field on the microstructural evolution of La2O3-doped BaTiO3 ceramics. In: Zeitschrift fuer Metallkunde/Materials Research and Advanced Techniques. 2005 ; Vol. 96, No. 2. pp. 167-171.
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abstract = "The grain growth behavior of La-doped BaTiO3specimens was investigated at 1350°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.",
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AB - The grain growth behavior of La-doped BaTiO3specimens was investigated at 1350°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.

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