Improved densification in cold sintering of gadolinia-doped ceria with reactive sintering aids

被引：1

作者：

Zhao, Yuye ^{[1
]}

Tang, Jian ^{[2
]}

Xu, Hongliang ^{[3
]}

Zhu, Lei ^{[1
]}

Ni, Na ^{[4
,5
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Mech Engn, Shanghai, Peoples R China

[2] JEOL Beijing Co Ltd, Shanghai Branch, Shanghai, Peoples R China

[3] Shanghai Aerosp Equipments Manufacturer Co Ltd, Shanghai, Peoples R China

[4] Shanghai Jiao Tong Univ, Shanghai Key Lab High Temp Mat & Precis Forming, Shanghai, Peoples R China

[5] Shanghai Jiao Tong Univ, Sch Mech Engn, 800Dongchuan Rd, Shanghai 200240, Peoples R China

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2024年 / 107卷 / 03期

基金：

中国国家自然科学基金;

关键词：

cold sintering; gadolinia-doped ceria ceramics; low temperature sintering; OXIDE FUEL-CELLS; IONIC-CONDUCTIVITY; PARTICLE-SIZE; BEHAVIORS;

D O I：

10.1111/jace.19409

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This study explores a novel reactive cold sintering method for improving the density of gadolinia-doped ceria (GDC) ceramics while reducing the annealing temperature. Instead of using deionized water as an aid in conventional cold sintering, stoichiometrically mixed Ce(NO3)3 & BULL;6H2O and Gd(NO3)3 & BULL;6H2O precursors were added as additives during the CSP in this study. The effects of processing parameters such as sintering temperature and additive content on the relative density of the compacts were investigated using synthesized GDC and commercial GDC powders as raw materials. The results showed that with the aid of precursors, GDC ceramics were sintered up to 90% of their theoretical densities at 850 & DEG;C and up to 94% at 950 & DEG;C when the synthesized nanopowder GDC was used. Additionally, the sintering mechanism was investigated, and it was found that the GDC generated by the precursor reaction effectively filled the gaps between the original particles, promoting densification of the sample after cold-pressing.

引用

页码：1459 / 1467

页数：9

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