The densification behavior of flash sintered BaTiO3

Herein, we report the densification behavior of a typical electric ceramic, barium titanate (BaTiO3), and highlight the role of oxygen vacancies in rapid densification of BaTiO3 during flash sintering. The activation energies of flash- and conventional-densification processes are compared to reveal...

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Bibliographic Details
Published inScripta materialia Vol. 186; pp. 362 - 365
Main Authors Ren, Ke, Huang, Sisi, Cao, Yejie, Shao, Gang, Wang, Yiguang
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.09.2020
Subjects
BaTiO3
Defect annihilation
Densification kinetics
Flash sintering
Oxygen vacancies
Oxygen vacancies
Defect annihilation
Densification kinetics
BaTiO3
Flash sintering
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Summary:Herein, we report the densification behavior of a typical electric ceramic, barium titanate (BaTiO3), and highlight the role of oxygen vacancies in rapid densification of BaTiO3 during flash sintering. The activation energies of flash- and conventional-densification processes are compared to reveal that the initiation of flash sintering is triggered by the accumulation of generated oxygen vacancies under the electric field. Furthermore, the densification kinetics of BaTiO3 and X-ray photoelectron spectroscopy of flash-sintered BaTiO3 infer that the ultrafast densification during the flash-sintering stage is dominated by the migration of electric field-generated defects coupled with defect-annihilation by take-in oxygen from the environment. [Display omitted]
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2020.05.005