The bulk and emerging interface properties of magnetite Fe3O4/YSZ(001) heterostructures grown by pulsed laser deposition are investigated. Fe3O4 thin films (4–38 nm) grow epitaxially in (111) orientation undergo a Verwey transition at max. TV = 117±0.6K. Surprisingly, the formation interfacial Fe2O3 phase is observed albeit quasi-inert yttrium-stabilized zirconia (YSZ). Possible mechanisms incl...

The bulk and emerging interface properties of magnetite Fe3O4/YSZ(001) heterostructures grown by pulsed laser deposition are investigated. Fe3O4 thin films (4–38 nm) grow epitaxially in (111) orientation undergo a Verwey transition at max. TV = 117±0.6K. Surprisingly, the formation interfacial Fe2O3 phase is observed albeit quasi-inert yttrium-stabilized zirconia (YSZ). Possible mechanisms incl...

In situ FT-IR spectroscopy was exploited to study the adsorption of CO2 and CO on commercially available yttria-stabilized ZrO2 (8 mol % Y, YSZ-8), Y2O3, and ZrO2. All three oxides were pretreated at high temperatures (1173 K) in air, which leads to effective dehydroxylation of pure ZrO2. Both Y2O3 and YSZ-8 show a much higher reactivity toward CO and CO2 adsorption than ZrO2 because of more fa...

Percolation theory is generalized to predict the effective properties of specific solid oxide fuel cell composite electrodes, which consist of a pure ion conducting material (e.g., YSZ or GDC) and a mixed electron and ion conducting material (e.g., LSCF, LSCM or CeO2). The investigated properties include the probabilities of an LSCF particle belonging to the electron and ion conducting paths, p...

Thermal stability of composite cathodes for solid oxide fuel cells, the mixtures of (La0.8Sr0.2)0.95MnO(3-δ) (LSM) and (Y2O3)(x)(ZrO2)(1-x) (xYSZ, x = 3, 6, 8 and 10), is determined using in-situ neutron diffraction. Thanks to the most advanced high flux neutron source, our work highlights the visualization of the phase evolutions in heterogeneous material systems at high temperatures, along wi...

Yttria-stabilized zirconia (YSZ) is one of the primary choices for the electrolyte material in solid oxide fuel cells (SOFC), due to its excellent ionic conductivity at high temperatures. Nevertheless, such performance is usually limited by the ionic conductivity at grain boundaries, which is at least two orders of magnitude lower than that of bulk [1]. As a result, many studies have been perfo...

The electrical conductivity of dense and nanoporous zirconia-based thin fi lms is compared to results obtained on bulk yttria stabilized zirconia (YSZ) ceramics. Different thin fi lm preparation methods are used in order to vary grain size, grain shape, and porosity of the thin fi lms. In porous fi lms, a rather high conductivity is found at room temperature which decreases with increasing temp...

Abstract Yttria-stabilized zirconia (YSZ) fiber composites are highly efficient thermal insulating materials; however, the poor shock resistance limits their versatile applications. In present study, YSZ was mixed directly with Al2TiO5 fiber, which had an extremely low expansion coefficient, to prepare YSZ−Al 2 TiO 5 (ZAT) by compression molding and heat treatment. The minimum coefficient of pr...

Air plasma spray (APS) process is used to produce high density and flowability spherical powders. Phase transformation that occurred in this process isn’t well known. In this paper, the YSZ powders have been sprayed in water to investigate the morphology changes and phase transformations via air plasma spray (APS) method. Phase analysis of powders was examined by XRD and the crystallite size an...