The densification behavior of flash sintered BaTiO3

被引：51

作者：

Ren, Ke ^{[1
]}

Huang, Sisi ^{[1
]}

Cao, Yejie ^{[1
]}

Shao, Gang ^{[2
]}

Wang, Yiguang ^{[3
]}

机构：

[1] Northwestern Polytech Univ, Sci & Technol Thermostruct Composite Mat Lab, Xian 710072, Shaanxi, Peoples R China

[2] Zhengzhou Univ, Henan Prov Ind Technol Res Inst Resources & Mat, Zhengzhou 450001, Peoples R China

[3] Beijing Inst Technol, Inst Adv Struct Technol, Beijing 100081, Peoples R China

来源：

SCRIPTA MATERIALIA | 2020年 / 186卷

基金：

中国国家自然科学基金;

关键词：

Flash sintering; Densification kinetics; BaTiO3; Oxygen vacancies; Defect annihilation; ELECTRIC-FIELD; GRAIN-GROWTH; ZIRCONIA; CERAMICS; MICROSTRUCTURE; ALUMINA; DIFFUSION; OXIDES; TIME;

D O I：

10.1016/j.scriptamat.2020.05.005

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：362 / 365

页数：4

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