"A versatile defect engineering strategy for room-temperature flash sin" by Angxuan WU, Ziyang YAN et al.

Article Title

A versatile defect engineering strategy for room-temperature flash sintering

Authors

Angxuan WU, Engineering Laboratory of Power Equipment Reliability in Complicated Coastal Environments, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
Ziyang YAN, Engineering Laboratory of Power Equipment Reliability in Complicated Coastal Environments, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
Xilin WANG, Engineering Laboratory of Power Equipment Reliability in Complicated Coastal Environments, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
Zhiyang YU, State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350108, China
Rongxia HUANG, School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China
Nianping YAN, State Grid Jiangxi Electric Power Research Institute, Nanchang 330096, China
Zhidong JIA, Engineering Laboratory of Power Equipment Reliability in Complicated Coastal Environments, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China

Keywords

flash sintering (FS), oxygen vacancies, defect engineering, ZnO powders, electric discharge

Abstract

In this study, we reported that flash sintering (FS) could be efficiently triggered at room temperature (25 ℃) by manipulating the oxygen concentration within ZnO powders via a versatile defect engineering strategy, fully demonstrating a promising method for the repaid prototyping of ceramics. With a low concentration of oxygen defects, FS was only activated at a high onset electric field of ~2.7 kV/cm, while arcs appearing on the surfaces of samples. Strikingly, the onset electric field was decreased to < 0.51 kV/cm for the activation of FS initiated, which was associated with increased oxygen concentrations coupled with increased electrical conductivity. Thereby, a general room-temperature FS strategy by introducing intrinsic structural defect is suggested for a broad range of ceramics that are prone to form high concentration of point defects.

Recommended Citation

WU, Angxuan; YAN, Ziyang; WANG, Xilin; YU, Zhiyang; HUANG, Rongxia; YAN, Nianping; and JIA, Zhidong (2022) "A versatile defect engineering strategy for room-temperature flash sintering," Journal of Advanced Ceramics: Vol. 11: Iss. 7, Article 3.
DOI: https://doi.org/10.1007/s40145-022-0591-5
Available at: https://dc.tsinghuajournals.com/journal-of-advanced-ceramics/vol11/iss7/3

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