Freeze casting of porous Ni-YSZ cermets

Young Hag Koh; Jong Jae Sun; Hyoun Ee Kim

doi:10.1016/j.matlet.2006.07.009

Freeze casting of porous Ni-YSZ cermets

Young Hag Koh, Jong Jae Sun, Hyoun Ee Kim

Research output: Contribution to journal › Article › peer-review

39 Citations (Scopus)

Abstract

Dual-phase porous Ni-YSZ cermets were fabricated via the freeze casting of a ceramic/camphene slurry. After removing the frozen camphene via sublimation at room temperature, the green samples were sintered for 3 h in air at various temperatures, ranging from 1100 to 1350 °C, and then reduced in an Ar-5% H₂ atmosphere at 700 °C for 3 h. The fabricated Ni-YSZ cermets showed 3-D pore channels formed by the replication of the entangled camphene dendrite network and small pores in the Ni-YSZ walls produced by partial sintering of the NiO-YSZ composite. Furthermore, the fabricated samples were found to possess reasonable electrical conductivities, thus rendering them suitable for use as the basic components of planar solid oxide fuel cells (SOFCs).

Original language	English
Pages (from-to)	1283-1287
Number of pages	5
Journal	Materials Letters
Volume	61
Issue number	6
DOIs	https://doi.org/10.1016/j.matlet.2006.07.009
Publication status	Published - 2007 Mar
Externally published	Yes

Keywords

Anode
Cermets
Fuel cells
Ni-YSZ
Porous

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.matlet.2006.07.009

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@article{986d04787b804268826d68a00ad78d20,

title = "Freeze casting of porous Ni-YSZ cermets",

abstract = "Dual-phase porous Ni-YSZ cermets were fabricated via the freeze casting of a ceramic/camphene slurry. After removing the frozen camphene via sublimation at room temperature, the green samples were sintered for 3 h in air at various temperatures, ranging from 1100 to 1350 °C, and then reduced in an Ar-5% H2 atmosphere at 700 °C for 3 h. The fabricated Ni-YSZ cermets showed 3-D pore channels formed by the replication of the entangled camphene dendrite network and small pores in the Ni-YSZ walls produced by partial sintering of the NiO-YSZ composite. Furthermore, the fabricated samples were found to possess reasonable electrical conductivities, thus rendering them suitable for use as the basic components of planar solid oxide fuel cells (SOFCs).",

keywords = "Anode, Cermets, Fuel cells, Ni-YSZ, Porous",

author = "Koh, {Young Hag} and Sun, {Jong Jae} and Kim, {Hyoun Ee}",

note = "Funding Information: This work was supported by a Korea Research Foundation Grant funded by the Korean Government (MOEHRD, Basic Research Promotion Fund) (KRF-2005-003-D00129). Copyright: Copyright 2008 Elsevier B.V., All rights reserved.",

year = "2007",

month = mar,

doi = "10.1016/j.matlet.2006.07.009",

language = "English",

volume = "61",

pages = "1283--1287",

journal = "Materials Letters",

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T1 - Freeze casting of porous Ni-YSZ cermets

AU - Koh, Young Hag

AU - Sun, Jong Jae

AU - Kim, Hyoun Ee

N1 - Funding Information: This work was supported by a Korea Research Foundation Grant funded by the Korean Government (MOEHRD, Basic Research Promotion Fund) (KRF-2005-003-D00129). Copyright: Copyright 2008 Elsevier B.V., All rights reserved.

PY - 2007/3

Y1 - 2007/3

N2 - Dual-phase porous Ni-YSZ cermets were fabricated via the freeze casting of a ceramic/camphene slurry. After removing the frozen camphene via sublimation at room temperature, the green samples were sintered for 3 h in air at various temperatures, ranging from 1100 to 1350 °C, and then reduced in an Ar-5% H2 atmosphere at 700 °C for 3 h. The fabricated Ni-YSZ cermets showed 3-D pore channels formed by the replication of the entangled camphene dendrite network and small pores in the Ni-YSZ walls produced by partial sintering of the NiO-YSZ composite. Furthermore, the fabricated samples were found to possess reasonable electrical conductivities, thus rendering them suitable for use as the basic components of planar solid oxide fuel cells (SOFCs).

AB - Dual-phase porous Ni-YSZ cermets were fabricated via the freeze casting of a ceramic/camphene slurry. After removing the frozen camphene via sublimation at room temperature, the green samples were sintered for 3 h in air at various temperatures, ranging from 1100 to 1350 °C, and then reduced in an Ar-5% H2 atmosphere at 700 °C for 3 h. The fabricated Ni-YSZ cermets showed 3-D pore channels formed by the replication of the entangled camphene dendrite network and small pores in the Ni-YSZ walls produced by partial sintering of the NiO-YSZ composite. Furthermore, the fabricated samples were found to possess reasonable electrical conductivities, thus rendering them suitable for use as the basic components of planar solid oxide fuel cells (SOFCs).

KW - Anode

KW - Cermets

KW - Fuel cells

KW - Ni-YSZ

KW - Porous

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DO - 10.1016/j.matlet.2006.07.009

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VL - 61

SP - 1283

EP - 1287

JO - Materials Letters

JF - Materials Letters

IS - 6

ER -

Freeze casting of porous Ni-YSZ cermets

Abstract

Keywords

ASJC Scopus subject areas

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