Reducing the interfacial reaction between borosilicate sealant and yttria-stabilized zirconia electrolyte by addition of HfO2

2015 ◽  
Vol 35 (8) ◽  
pp. 2427-2431 ◽  
Author(s):  
Shunrun Chen ◽  
Zhiwu Yu ◽  
Qi Zhang ◽  
Junping Wang ◽  
Teng Zhang ◽  
...  
Keyword(s):  
Interfacial Reaction ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Zirconia Electrolyte

Development of Zirconia Electrolyte Films on Porous Doped Lanthanum Manganite Cathodes by Electrophoretic Deposition

1999 ◽  
Vol 575 ◽  
Author(s):  
R. N. Basu ◽  
C. A. Randall ◽  
M. J. Mayo
Keyword(s):  
Solid Oxide Fuel Cells ◽  
Electrophoretic Deposition ◽  
Yttria Stabilized Zirconia ◽  
Lanthanum Manganite ◽  
Ceramic Powders ◽  
Stabilized Zirconia ◽  
Uniform Coating ◽  
Cathode Tube ◽  
Zirconia Film ◽  
Zirconia Electrolyte

ABSTRACTElectrophoretic deposition (EPD) was explored as an inexpensive route for fabricating the 8mol% yttria stabilized zirconia electrolyte in solid oxide fuel cells (SOFCs). Normally, deposition of particulate ceramic powders onto a sintered porous surface yields a non uniform coating which, after sintering, results in porosity, surface roughness and cracking in the coating. To overcome this problem, the present study used a fugitive graphite interlayer between the porous air electrode supported (AES) cathode tube (doped-LaMnO3) and the deposited zirconia film. By this approach, a fairly dense green coating (˜ 60%) was obtained, which yielded a smooth surface and pore-free microstructure after sintering. Preliminary results on the effect of a fugitive interlayer on the unfired (green) and fired zirconia coatings are discussed.

The microstructure of continuously processed Yba2Cu3Oy coated conductors with underlying CeO2 and ion-beam-assisted yttria-stabilized zirconia buffer layers

2000 ◽  
Vol 15 (5) ◽  
pp. 1110-1119 ◽  
Author(s):  
T. G. Holesinger ◽  
S. R. Foltyn ◽  
P. N. Arendt ◽  
H. Kung ◽  
Q. X. Jia ◽  
...  
Keyword(s):  
Interfacial Reaction ◽  
Ion Beam ◽  
Misfit Strain ◽  
Critical Currents ◽  
Coated Conductors ◽  
Yttria Stabilized Zirconia ◽  
Buffer Layers ◽  
Inconel 625 ◽  
Microstructural Development ◽  
Stabilized Zirconia

The microstructural development of YBa2Cu3Oy (Y-123) coated conductors based on the ion-beam-assisted deposition (IBAD) of yttria-stabilized zirconia (YSZ) to produce a biaxially textured template is presented. The architecture of the conductors was Y-123/CeO2/IBAD YSZ/Inconel 625. A continuous and passivating Cr2O3 layer forms between the YSZ layer and the Inconel substrate. CeO2 and Y-123 are closely lattice-matched, and misfit strain is accommodated at the YSZ/CeO2 interface. Localized reactions between the Y-123 film and the CeO2 buffer layer result in the formation of BaCeO3, YCuO2, and CuO. The positive volume change that occurs from the interfacial reaction may act as a kinetic barrier that limits the extent of the reaction. Excess copper and yttrium generated by the interfacial reaction appear to diffuse along grain boundaries and intercalate into Y-123 grains as single layers of the Y-247, Y-248, or Y-224 phases. The interfacial reactions do not preclude the attainment of high critical currents (Ic) and current densities (Jc) in these films nor do they affect to any appreciable extent the nucleation and alignment of the Y-123 film.

Mechanical properties of spark plasma sintered ceria reinforced 8 mol% yttria-stabilized zirconia electrolyte

2012 ◽  
Vol 1 (5) ◽  
pp. 306-315 ◽  
Author(s):  
Alka Gupta ◽  
Samir Sharma ◽  
Neelima Mahato ◽  
Amanda Simpson ◽  
Shobit Omar ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Spark Plasma ◽  
Zirconia Electrolyte

Synthesis and Properties of Composite Stabilized ZrO2

2013 ◽  
Vol 544 ◽  
pp. 68-71
Author(s):  
Jing Hui Cui ◽  
Tao Feng ◽  
Jin Feng Xia ◽  
Dan Yu Jiang ◽  
Ge Ming Liu ◽  
...  
Keyword(s):  
High Temperature ◽  
Sintering Temperature ◽  
Decomposition Temperature ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Muffle Furnace ◽  
Flexure Strength ◽  
Different Temperatures ◽  
Zirconia Electrolyte

Through Mechanical grounding method, CaZrO3 – 8YSZ(8% in mol yttria stabilized zirconia) electrolyte samples with different amounts of CaZrO3 at 10wt%, 20wt%, 30wt% were sintered at different temperatures in Muffle furnace. The decomposition temperature of CaZrO3 is 825°C-900°C under one atmosphere. At high temperature, CaZrO3 decomposes into CaO and ZrO2. So Y2O3-CaO-ZrO2 complex is composed. The effects of the sintering temperature and the contents of the CaZrO3 on the conductivity, porosity, flexure strength, hardness were investigated. XRD and SEM were used to analyse the compositions and microcosmic morphology.

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