Improved mechanical properties and thermal expansion behavior of NiO–Y2O3 stabilized ZrO2 composite by addition of LaNbO4 for anode-support of planar solid oxide fuel cells

Ma, Ben; Li, Kai; Chi, Bo; Pu, Jian; Li, Jian

doi:10.1016/j.jallcom.2014.11.202

Cited by 7 publications

(1 citation statement)

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“…LaNbO 4 has been investigated as an electrolyte material for proton conducting SOFCs and is stable in the anode environment . Previous studies have shown that the addition of LaNbO 4 improves the fracture toughness of densified Al 2 O 3 and NiO‐YSZ ceramic composites, as there are two ferroelastic domains separated by a mobile boundary located at

{2 0 \bar{4}}_{normalI} / {4 0 2}_{normalII}

in the monoclinic LaNbO 4, and the preferentially oriented one grows at the expanse of the other, referred to as “domain switch”, as a response to exerted stresses . However, dense ceramic composite cannot be used as an anode‐support material for SOFC since it is difficult to transport the fuel gasses to the active sites in the functional anode.…”

Section: Introductionmentioning

confidence: 99%

LaNbO₄–NiO–Y₂O₃ Stabilized ZrO₂ Anode‐Support Materials for Solid Oxide Fuel Cells

Chi

et al. 2015

J. Am. Ceram. Soc.

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As anode-support materials for solid oxide fuel cells, porous LaNbO 4 -NiO-Y 2 O 3 stabilized ZrO 2 (YSZ) composites (LNY), containing 0, 5, 10, 15, and 20 wt% of LaNbO 4 and designated as 0LNO, 5LNO, 10LNO, 15LNO, and 20LNO, respectively, are prepared by tape casting and sintering. They are investigated for their microstructure and mechanical, electrical and thermal expansion properties. The porosity of as-sintered LNY is around 30%, and that of reduced LNY cermets decreases from 47% for reduced 0LNO to 43% for reduced 20LNO. The fracture strength (r f ) of LNY is higher than that of the reduced form; however, both of them are not rather sensitive to the amount of LaNbO 4 , depending on crack-originating flaws in the specimens. The fracture toughness (K IC ) of LNY increases with LaNbO 4 content and is 1.87 MPaÁm 1/2 for 20LNO, which is more than 20% increase from that of 0LNO; however the K IC for reduced LNY is higher than that of LNY, and decreases with increasing LaNbO 4 content due to the decreased amount of ductile metallic Ni phase. The conductivity of reduced LNY depends on Ni content and is higher than 289 S/cm at temperatures below 900°C. The coefficient of thermal expansion (CTE) of both LNY and reduced LNY is in the range between 12.4 and 11.4 3 10 -6 K -1; which is closely matched with that of YSZ electrolyte.

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{2 0 \bar{4}}_{normalI} / {4 0 2}_{normalII}

Section: Introductionmentioning

confidence: 99%

LaNbO₄–NiO–Y₂O₃ Stabilized ZrO₂ Anode‐Support Materials for Solid Oxide Fuel Cells

Chi

et al. 2015

J. Am. Ceram. Soc.

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Photodegradation of organic compounds using chromium oxide-doped nano-sulfated zirconia

2017

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Effect of nano-Al2O3 addition on mechanical durability of nickel-yttria stabilized zirconia anode support of solid oxide fuel cells

Mehran

Khan

Lim

et al. 2018

Ceramics International

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Improved mechanical properties and thermal expansion behavior of NiO–Y2O3 stabilized ZrO2 composite by addition of LaNbO4 for anode-support of planar solid oxide fuel cells

Cited by 7 publications

References 34 publications

LaNbO₄–NiO–Y₂O₃ Stabilized ZrO₂ Anode‐Support Materials for Solid Oxide Fuel Cells

LaNbO₄–NiO–Y₂O₃ Stabilized ZrO₂ Anode‐Support Materials for Solid Oxide Fuel Cells

Photodegradation of organic compounds using chromium oxide-doped nano-sulfated zirconia

Effect of nano-Al2O3 addition on mechanical durability of nickel-yttria stabilized zirconia anode support of solid oxide fuel cells

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Improved mechanical properties and thermal expansion behavior of NiO–Y2O3 stabilized ZrO2 composite by addition of LaNbO4 for anode-support of planar solid oxide fuel cells

Cited by 7 publications

References 34 publications

LaNbO4–NiO–Y2O3 Stabilized ZrO2 Anode‐Support Materials for Solid Oxide Fuel Cells

LaNbO4–NiO–Y2O3 Stabilized ZrO2 Anode‐Support Materials for Solid Oxide Fuel Cells

Photodegradation of organic compounds using chromium oxide-doped nano-sulfated zirconia

Effect of nano-Al2O3 addition on mechanical durability of nickel-yttria stabilized zirconia anode support of solid oxide fuel cells

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LaNbO₄–NiO–Y₂O₃ Stabilized ZrO₂ Anode‐Support Materials for Solid Oxide Fuel Cells

LaNbO₄–NiO–Y₂O₃ Stabilized ZrO₂ Anode‐Support Materials for Solid Oxide Fuel Cells