Solid-state reactive sintering mechanism for large-grained yttrium-doped barium zirconate proton conducting ceramics

2010 ◽  
Vol 20 (30) ◽  
pp. 6333 ◽  
Author(s):  
Jianhua Tong ◽  
Daniel Clark ◽  
Lisa Bernau ◽  
Michael Sanders ◽  
Ryan O'Hayre
Keyword(s):  
Solid State ◽  
Barium Zirconate ◽  
Reactive Sintering ◽  
Proton Conducting ◽  
Sintering Mechanism

Solid-state reactive sintering mechanism for proton conducting ceramics

2013 ◽  
Vol 253 ◽  
pp. 201-210 ◽  
Author(s):  
Stefan Nikodemski ◽  
Jianhua Tong ◽  
Ryan O'Hayre
Keyword(s):  
Solid State ◽  
Reactive Sintering ◽  
Proton Conducting ◽  
Sintering Mechanism

scholarly journals Effects of NiO addition on sintering and proton uptake of Ba(Zr,Ce,Y)O3-δ

2021 ◽  
Author(s):  
Yuanye Huang ◽  
Rotraut Merkle ◽  
Joachim Maier
Keyword(s):  
Solid State ◽  
Complex Nature ◽  
Reactive Sintering ◽  
Sintering Aid ◽  
Proton Conducting ◽  
Proton Uptake ◽  
Sintering Method

The effects of 0.125-0.2 wt% NiO added as sintering aid for highly refractory Ba(Zr,Ce,Y)O3-δ proton conducting ceramics are investigated. The complex nature of the solid state reactive sintering method shows...

scholarly journals Structural and Electrochemical Properties of Dense Yttria-Doped Barium Zirconate Prepared by Solid-State Reactive Sintering

Energies ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 3083 ◽  
Author(s):  
Dae Yun ◽  
Jaegyeom Kim ◽  
Seung-Joo Kim ◽  
Jong-Heun Lee ◽  
Jong-Nam Kim ◽  
...  
Keyword(s):  
Solid State ◽  
Electrochemical Properties ◽  
Electrochemical Impedance ◽  
Sintering Temperature ◽  
Proton Conductors ◽  
Barium Zirconate ◽  
Reactive Sintering ◽  
Practical Utilization ◽  
Average Grain Size ◽  
Ceramic Fuel Cells

For practical utilization of proton-conducting ceramic fuel cells and electrolyzers, it is essential to lower the sintering temperature and processing time of BaZrO3-based proton conductors. We investigated the effect of sintering temperature and time on the structural and electrochemical properties of dense BaZr0.8Y0.2O3−δ (BZY) prepared by a solid-state reactive sintering process, using NiO as a sintering aid. The sintered BZY prepared from the micronized precursor powder exhibited a density higher than 93%, and an average grain size in the range of 0.6 to 1.4 μm. The orthorhombic BaY2NiO5 phase was also observed in the sintered BZY from the combined conventional and synchrotron X-ray diffraction measurements. Electrochemical impedance spectroscopy showed that the total proton conductivities of BZY can be modulated by sintering temperature in a wet reducing atmosphere. The maximum total ion transport number achieved was 0.89 at 600 °C, and the maximum power density of the symmetric BZY electrolyte supported cell with Pt electrodes was 5.24 mW·cm−2 at 900 °C.

Supported High Temperature Protonic Films Produced by Solid State Reaction

2006 ◽  
Vol 972 ◽  
Author(s):  
Wilhelm A Meulenberg ◽  
José M. Serra
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Nominal Composition ◽  
Barium Zirconate ◽  
Barium Cerate ◽  
Strontium Zirconate ◽  
State Transformation ◽  
Solid State Transformation ◽  
Proton Conducting ◽  
Homogeneous Composition

AbstractThis work presents the last progresses in the development of thin oxidic proton conducting electrolytes supported on mixed conducting cermets making use of a solid state reaction. The procedure includes preparation routes applying solid state transformation of an already-gastight oxide layer (typically doped zirconia and ceria) by reacting with an alkali-earths layer (stoichiometric amount) deposited by screen printing on top of that. This kind of supported films can find application as IT-SOFC, H2-membranes and advanced catalytic converters. Thin-film (∼5μm) proton conducting membranes with the nominal composition as for instance BaZr0.85Y0.15O3-δ and BaCe0.8Gd0.2O3-δ were prepared over porous Ni-8YSZ or Ni-CGO substrates by solid state reaction. The produced films are gastight with a homogeneous composition, and showed a highly crystalline cubic perovskite structure. The solid state reaction promoted the formation of (i) a different grain size distribution from 0.1 μm for barium zirconate to 2-3μm for barium cerate, and (b) the formation of a porous fibrous top-layer (for barium zirconate) or a just flat surface (for strontium zirconate), depending on the exact composition of the reacting oxides.

Proton-conducting yttrium-doped barium cerate ceramics synthesized by a cost-effective solid-state reactive sintering method

2010 ◽  
Vol 181 (33-34) ◽  
pp. 1486-1498 ◽  
Author(s):  
Jianhua Tong ◽  
Daniel Clark ◽  
Lisa Bernau ◽  
Archana Subramaniyan ◽  
Ryan O'Hayre
Keyword(s):  
Solid State ◽  
Cost Effective ◽  
Reactive Sintering ◽  
Barium Cerate ◽  
Proton Conducting ◽  
Sintering Method ◽  
Doped Barium Cerate

Dynamics of benzimidazole ethylphosphonate: a solid-state NMR study of anhydrous composite proton-conducting electrolytes

2013 ◽  
Vol 15 (41) ◽  
pp. 17983 ◽  
Author(s):  
Z. Blossom Yan ◽  
Nicole E. De Almeida ◽  
Jason W. Traer ◽  
Gillian R. Goward
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Proton Conducting ◽  
Nmr Study
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