Water-assisted flash sintering: Flashing ZnO at room temperature to achieve ∼98% density in seconds

被引：90
|
作者：
Nie, Jiuyuan [1 ]
Zhang, Yuanyao [1 ]
Chan, Jonathan M. [1 ]
Huang, Rongxia [1 ]
Luo, Jian [1 ]
机构：
[1] Univ Calif San Diego, Dept NanoEngn, La Jolla, CA 92093 USA
来源：
SCRIPTA MATERIALIA | 2018年 / 142卷
关键词：
Flash sintering; Water-assisted sintering; Ultrafast densification; Energy-saving ceramic fabrication; ZnO; NANOCRYSTALLINE ZINC-OXIDE; GRAIN-GROWTH; MICROSTRUCTURAL DEVELOPMENT; ENHANCED DENSIFICATION; THERMAL RUNAWAY; ELECTRIC-FIELD; DEGREES-C; CERAMICS; ZIRCONIA; ATMOSPHERES;
D O I：
10.1016/j.scriptamat.2017.08.032
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Water can trigger flash sintering of ZnO powder pellets at room temperature to achieve similar to 98% of the theoretical density in 30 s without any external furnace heating. The specimen conductivity can be increased by >10,000 times via absorbing water vapor to enable the room-temperature flash. The initial electric field must be higher than a critical threshold to lead to densification, suggesting bifurcation in kinetic pathways. This new cost and energy saving water-assisted flash sintering (WAFS) technology can potentially be applied to consolidate other ceramic materials. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：79 / 82
页数：4
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