Surface Diffusion of Oxygen Transport Membrane Materials Studied by Grain-Boundary Grooving

In the sintering of ceramics, cracks are inevitably encountered after sintering. But very few studies have been presented in the literature for qualifying and quantifying effects of inhomogeneity on sintering kinetics. Therefore, a series of detailed sintering variables such as grain size, surface tension and diffusivity are chosen to study the effects of their inhomogeneity on sintering kinetics through a computational model calculated by computer.Furthermore, there are two main achievements in this computational model that first one is providing a numerical solution for the curvature at triple junction (pore tip) of microscopic particles, and second one is considering the effect of surface diffusion on first-stage sintering where diffusion mechanism is coupled by grain-boundary and surface diffusion.

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Micromechanics of formation and shrinkage of a closed pore in sintering by coupled grain boundary/surface diffusion

Journal of the European Ceramic Society ◽

10.1016/j.jeurceramsoc.2019.03.022 ◽

2019 ◽

Vol 39 (9) ◽

pp. 2952-2959 ◽

Cited By ~ 2

Author(s):

Fumihiro Wakai ◽

Gaku Okuma ◽

Norimasa Nishiyama ◽

Olivier Guillon

Keyword(s):

Grain Boundary ◽

Surface Diffusion ◽

Boundary Surface ◽

Closed Pore

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Composite mixed ionic-electronic conducting ceramic for intermediate temperature oxygen transport membrane

Ceramics International ◽

10.1016/j.ceramint.2017.05.222 ◽

2017 ◽

Vol 43 ◽

pp. S628-S632 ◽

Cited By ~ 5

Author(s):

Ming-Wei Liao ◽

Tai-Nan Lin ◽

Wei-Xin Kao ◽

Chun-Yen Yeh ◽

Yu-Ming Chen ◽

...

Keyword(s):

Oxygen Transport ◽

Intermediate Temperature ◽

Oxygen Transport Membrane

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A new Insight into the Electromigration Behavior of Copper Interconnects: The Roles of Grain Boundary and Surface Diffusion

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.143-147.1673 ◽

1997 ◽

Vol 143-147 ◽

pp. 1673-1678 ◽

Cited By ~ 3

Author(s):

Evgeny E. Glickman ◽

M. Nathan

Keyword(s):

Grain Boundary ◽

Surface Diffusion ◽

Copper Interconnects ◽

Insight Into

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A CO2-stable reduction-tolerant Nd-containing dual phase membrane for oxyfuel CO2 capture

Journal of Materials Chemistry A ◽

10.1039/c3ta14870j ◽

2014 ◽

Vol 2 (21) ◽

pp. 7780-7787 ◽

Cited By ~ 40

Author(s):

Huixia Luo ◽

Tobias Klande ◽

Zhengwen Cao ◽

Fangyi Liang ◽

Haihui Wang ◽

...

Keyword(s):

Partial Oxidation ◽

Co2 Capture ◽

Oxygen Transport ◽

Synthesis Gas ◽

Dual Phase ◽

Membrane Material ◽

Oxidation Of Methane ◽

Oxygen Transport Membrane ◽

Stable Reduction ◽

Harsh Conditions

We report a novel CO2-stable reduction-tolerant dual-phase oxygen transport membrane 40 wt% Nd0.6Sr0.4FeO3−δ–60 wt% Ce0.9Nd0.1O2−δ. This membrane material shows good reversibility of the oxygen permeation fluxes, good stability in a CO2 atmosphere and under the harsh conditions of partial oxidation of methane to synthesis gas up to 950 °C.

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