Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/8916
Title: Electrical properties of gadolinia doped ceria electrolytes fabricated by infiltration aided sintering
Authors: Sındıraç, Can
Büyükaksoy, Aligül
Akkurt, Sedat
Sındıraç, Can
Akkurt, Sedat
Keywords: Solid oxide fuel cell
Electrolytes
Microstructure
Densification
Infiltration
Conductivity
Open circuit voltage
Issue Date: 2019
Publisher: Elsevier Ltd.
Abstract: Common solid oxide fuel cell (SOFC) electrolyte materials (e.g., gadolinia doped ceria - GDC) demand temperatures exceeding 1400 degrees C for densification by conventional solid state sintering. It is very desirable to reduce the densification of the SOFC electroltytes to i) avoid microstructural coarsening of the composite anode layers, which are co-sintered with the electolyte layer in the anode supported SOFC fabrication scheme and ii) reduce energy consumption during SOFC manufacturing. We have recently demostrated a novel infiltration-aided sintering route to densify GDC ceramics at 1200 degrees C. In the present work, we present the electrical properties of GDC ceramics fabricated thusly. Comparison of high density (>= 95%) samples fabricated by conventional or infiltration-aided sintering reveal that at 700 degrees C, similar total electrical conductivities are obtained, while at 300 degrees C, specific grain boundary resistivity is smaller in the latter. Bulk (grain) conductivity is higher in porous GDC ceramics (relative density <= 90%) fabricated by infiltration-aided sintering than the conventionally sintered ones with similar porosities. Finally, open circuit voltage of 0.84 V at 700 degrees C, obtained under dilute hydrogen and stagnant air conditions suggests that GDC ceramics densified by infiltration-aided sintering are suitable for use as SOFC electrolytes.
URI: https://doi.org/10.1016/j.ssi.2019.115020
https://hdl.handle.net/11147/8916
ISSN: 0167-2738
1872-7689
Appears in Collections:Mechanical Engineering / Makina Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

Files in This Item:
File SizeFormat 
1-s2.0-S0167273819305120-main.pdf
  Until 2023-01-28
2.29 MBAdobe PDFView/Open    Request a copy
Show full item record

CORE Recommender

SCOPUSTM   
Citations

4
checked on Oct 16, 2021

WEB OF SCIENCETM
Citations

6
checked on Oct 16, 2021

Page view(s)

34
checked on Oct 18, 2021

Download(s)

2
checked on Oct 18, 2021

Google ScholarTM

Check

Altmetric


Items in GCRIS Repository are protected by copyright, with all rights reserved, unless otherwise indicated.