Yttria-stabilized zirconia (YSZ) thin films were deposited using direct current (reactive and metallic) radio frequency magnetron sputtering. The effect of the deposition technique annealing treatment on microstructure crystallinity was assessed. Using produced in this work, oxygen gas sensors built their performance under vacuum conditions evaluated. All exhibited a cubic crystalline structure...

Diierent bounds on the conductivity of a composite material may improve on each other in diierent conductivity regimes. If so, the question arises of how to eeciently interpolate between the bounds. In this paper we show how to do an interpolation with a two-point Pad e approximation method. For bounds on two-component composites the interpolation method is shown to be, in a sense, the best pos...

Ethylene oxide (EO) is industrially produced by epoxidation of ethylene on Ag-based heterogeneous catalysts. Electrophilic oxygen species are assumed to be active key in the EO production. This study explores possibility electrochemically these a solid electrochemical cell. Two series Ag based cermet electrodes were prepared either with Yttria Stabilized Zirconia (YSZ), pure ionic conductor, or...

Porous ceramics of Y2O3-stabilized ZrO2 (YSZ) were prepared by tape-casting methods using both pyrolyzable pore formers and NiO followed by acid leaching. The porosity of YSZ wafers increased in a regular manner with the mass of graphite or polymethyl methacrylate (PMMA) to between 60% and 75% porosity. SEM indicated that the shape of the pores in the final ceramic was related to the shape of t...

Abstract The reduction of carbon dioxide emissions and the corresponding increase in gasoline engine efficiency are crucial development. Wall heat losses a major cause loss, accounting for 15–30% total fuel energy. One promising solution is use "thermal swing" coatings at combustion chamber walls because offering possibility that surface wall temperature following working gas temperature, where...

This paper presents finite element analysis (FEA) of a coated and uncoated cylinder heads of a diesel engine to examine the distribution of temperature and stress. A thermal barrier coating system was applied on the combustion chamber of the cylinder heads, consists of two-layer systems: a ceramic top coat (TC), made of yttria stabilized zirconia (YSZ), ZrO2-8%Y2O3 and also a metallic bond coat...

A novel route to fabricate nano-fiber anode material for solid oxide fuel cells (SOFCs) is presented. Firstly, uniform nano-fibers of 8 mol % Yttria Stabilized Zirconia (8YSZ) were formed in an electrospinning process; then, these electrospun fibers were calcined at temperatures up to 1300 °C; and finally the ceramic 8YSZ nano-fibers were coated with nickel in an electroless plating process. Th...