Journal ArticleDOI
Dependence of Oxidation Modes on Zirconia Content in Silicon Carbide/Zirconia/Mullite Composites
Cheng Yuan Tsai,Chien-Cheng Lin +1 more
TLDR
In this article, two basic oxidation modes of silicon carbide/zirconia/mullite composites were defined based on the plotted curve of the gradient of the silica (SiO2) layer thickness versus depth.Abstract:
Two basic oxidation modes of silicon carbide/zirconia/mullite (SiC/ZrO2/mullite) composites were defined based on the plotted curve of the gradient of the silica (SiO2) layer thickness (formed on individual SiC particles) versus depth. Mode I, where oxygen diffusivity was much slower in the matrix than in the SiO2 layer, exhibited a relatively large gradient and limited oxidation depth. Mode II, where oxygen diffusivity was much faster in the matrix than in the SiO2 layer, displayed a relatively small gradient and an extensive oxidation depth. When the volume fraction of ZrO2 was below a threshold limit, the composites exhibited Mode I behavior; otherwise, Mode II behavior was observed. For composites with a ZrO2 content above the threshold limit, the formation of zircon (ZrSiO4), as a result of the reaction between ZrO2 and the oxidation product (i.e., SiO2), might change the oxidation behavior from Mode II to Mode I.read more
Citations
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Journal ArticleDOI
Development and application of oxygen permeable membrane in selective oxidation of light alkanes
TL;DR: In this article, the main applications of oxygen permeable membrane in selective oxidation of light alkanes are summarized, which includes partial oxidation of methane (POM) to syngas and partial oxidization of heptane (POH) to produce H2.
Journal ArticleDOI
La-Doped BaCoO3 as a Cathode for Intermediate Temperature Solid Oxide Fuel Cells Using a LaGaO3 Base Electrolyte
TL;DR: In this paper, the authors investigated the cathodic behavior of BaCoO 3 doped with La for an intermediate temperature solid oxide fuel cell (ITFC) and found that the electrical conductivity of an ITFC increased monotonically with an increasing amount of La doped for the Ba site.
Journal ArticleDOI
Screening of A-Substitution in the System A0.68Sr0.3Fe0.8Co0.2O3 − δ for SOFC Cathodes
José M. Serra,José M. Serra,Vicente B. Vert,M. Betz,V. A. C. Haanappel,Wilhelm A. Meulenberg,Frank Tietz +6 more
TL;DR: In this article, several elements were studied as potential A-site substituents in the perovskite A 0.68 Sr 0.3 Fe 0.8 Co 0.2 O 3-δ system.
Journal ArticleDOI
Interfacial reactions in ceramic membrane reactors for syngas production
TL;DR: In this paper, the authors compare the performance of mixed Ionic and electronic conductors (MIEC) membrane reactors to solid oxide fuel cells, for which the operating principles are nearly identical.
Journal ArticleDOI
Stable Mixed-Conducting Bilayer Membranes for Direct Conversion of Methane to Syngas
Eric D. Wachsman,Terry L. Clites +1 more
TL;DR: In this paper, the oxygen permeability and stability of perovskite-type La 0.6 Sr 0.4 Co 0.8 Fe 0.2 O 3 (LSCF) coated with (Sm 2 O 3 ) 0.9 (SDC) are presented.
References
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Journal ArticleDOI
Toughening Behavior in Whisker-Reinforced Ceramic Matrix Composites
TL;DR: In this article, the authors analyzed the toughening behavior of a bridging zone immediately behind the crack tip of a SiC-whisker-reinforced ceramics.
Journal Article
Development of SiC-whisker-reinforced ceramics
G.C. Wei,P.F. Becher +1 more
TL;DR: In this paper, powder-whisker mixtures were hot-pressed to obtain densification behavior of the composites, which was influenced by the temperature, pressing pressure, and whisker content.
Journal ArticleDOI
Synthesis and Mechanical Properties of Stoichiometric Aluminum Silicate (Mullite)
K. S. Mazdiyasni,L. M. Brown +1 more
TL;DR: In this paper, high-density translucent polycrystalline bodies of stoichiometric aluminum silicate (mullite) were obtained by vacuum-hot-pressing of high-purity submicron mixed oxide powders.
Journal ArticleDOI
Mechanical Properties of Sintered, In Situ-Reacted Mullite-Zirconia Composites
Nils Claussen,Jürgen Jahn +1 more
Journal ArticleDOI
Sintering and Mechanical Properties of Stoichiometric Mullite
TL;DR: Stoichiometric mullite powder (3Al2O3·2SiO2) prepared by spray pyrolysis and sintered at 1650°C attained 95% of theoretical density as mentioned in this paper.
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