Please use this identifier to cite or link to this item: http://idr.nitk.ac.in/jspui/handle/123456789/12759
Title: Record-low sintering-temperature (600 c) of solid-oxide fuel cell electrolyte
Authors: Dasari, Hari Prasad
Ahn, K.
Park, S.-Y.
Hong, J.
Kim, H.
Yoon, K.J.
Son, J.-W.
Kim, B.-K.
Lee, H.-W.
Lee, J.-H.
Issue Date: 2016
Citation: Journal of Alloys and Compounds, 2016, Vol.672, , pp.397-402
Abstract: One of the major problems arising with Solid-Oxide Fuel Cell (SOFC) electrolyte is conventional sintering which requires a very high temperature (>1300 C) to fully densify the electrolyte material. In the present study, the sintering temperature of SOFC electrolyte is drastically decreased down to 600 C. Combinational effects of particle size reduction, liquid-phase sintering mechanism and microwave sintering resulted in achieving full density in such a record-low sintering temperature. Gadolinium doped Ceria (GDC) nano-particles are synthesized by co-precipitation method, Lithium (Li), as an additional dopant, is used as liquid-phase sintering aid. Microwave sintering of this electrolyte material resulted in decreasing the sintering temperature to 600 C. Micrographs obtained from Scanning/Transmission Electron Microscopy (SEM/TEM) clearly pointed a drastic growth in grain-size of Li-GDC sample (?150 nm) than compared to GDC sample (<30 nm) showing the significance of Li addition. The sintered Li-GDC samples displayed an ionic conductivity of ?1.00 10-2 S cm-1 at 600 C in air and from the conductivity plots the activation energy is found to be 0.53 eV. 2016 Elsevier B.V. All rights reserved.
URI: https://idr.nitk.ac.in/jspui/handle/123456789/12759
Appears in Collections:1. Journal Articles

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