Silver catalytic effect on flash sintering of ceramics

被引：0

作者：

Lavagnini, Isabela R. ^{[1
,2
,3
]}

Yoon, Bola ^{[3
]}

Avila, Viviana ^{[3
]}

Ghose, Sanjit K. ^{[4
]}

Raj, Rishi ^{[3
]}

Pallone, Eliria M. J. A. ^{[1
,5
]}

Jesus, Lilian M. ^{[6
]}

Campos, Joao, V ^{[2
,3
]}

机构：

[1] Univ Sao Paulo, Dept Engn Biossistemas, USP Ave Duque Caxias Norte 225, Pirassununga, SP, Brazil

[2] Univ Fed Sao Carlos, Dept Mat Engn, BR-13635905 Sao Carlos, SP, Brazil

[3] Univ Colorado, Dept Mech Engn, Boulder, CO 80309 USA

[4] Brookhaven Natl Lab, Natl Synchrotron Light Source2, Upton, NY 11973 USA

[5] Univ Sao Paulo, Postgrad Programme Mat Sci & Engn, USP FZEA, Ave Duque Caxias Norte 225, BR-13635900 Pirassununga, Brazil

[6] Univ Fed Sao Carlos UFSCAR, Dept Phys, Grp Adv Funct Mat MAFA, BR-13565905 Sao Carlos, SP, Brazil

来源：

OPEN CERAMICS | 2024年 / 17卷

关键词：

Electric field-assisted sintering; Hydroxyapatite; Zirconia; FIELD; HYDROXYAPATITE; CONDUCTIVITY; ZIRCONIA; ALUMINA;

D O I：

10.1016/j.oceram.2024.100565

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：

We investigated the use of metallic silver as a catalyst for flash sintering on hydroxyapatite/zirconia (HZ) composites. Adding 3 wt% of silver to the ceramic powder reduced the flash onset temperature (from 1084 degrees C to 925 degrees C) and also the electric field (from 300 V cm-1 to 150 V cm- 1) used in the process. We attribute this behaviour to the formation of a silver percolation path that acts as a heat source, accelerating the thermal runaway. As a result, both the flash temperature and the required electric field were reduced. Furthermore, the results suggest that the temperatures along the percolation paths are high enough to reach the boiling point of silver, forming a gaseous phase that leaves the sample.

引用

页数：7

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