Qiang Zhen

Pressureless reactive sintering mechanism of nanocrystalline Bi2O3-Y2O3 solid electrolyte

Abstract The nanocrystalline Bi 2 O 3 -Y 2 O 3 solid electrolyte material was synthesized by pressureless reactive sintering process with Bi 2 O 3 and Y 2 O 3 nano mixed powder as raw materials, which was prepared by a chemical coprecipitation process. The study on the behavior of nano δ-Bi 2 O 3 formation and its grain growth showed that the solid solution reaction of Y 2 O 3 and β-Bi 2 O 3 to form δ-Bi 2 O 3 occurs mainly in the initial stage of sintering process, and nano δ-Bi 2 O 3 crystal grains grow approximately following the rule of paracurve (( D − D 0 ) 2 = K·t ) during sintering process. After sintered at 600°C for 2 h, the samples could reach above 96% in relative density and have dense microstructure with few remaining pores, the δ-Bi 2 O 3 grains are less than 100 nm in size.

Fluorite Ce0.8Sm0.2O2-δ porous layer coating to enhance the oxygen permeation behavior of a BaCo0.7Fe0.2Nb0.1O3-δ mixed conductor

Fluorite Ce0.8Sm0.2O2-δ (SDC) nanopowder with a crystallite size of 15 nm was synthesized by a co-precipitation method. An SDC porous layer was coated onto a BaCo0.7Fe0.2Nb0.1O3-δ (BCFN) mixed conductor to improve its oxygen transport behavior. The results show that the SDC-coated BCFN membrane exhibits a remarkably higher oxygen permeation flux (

Investigation of chemical stability and oxygen permeability of perovskite-type Ba0.5Sr0.5Co0.8Fe0.2O3 − δ and BaCo0.7Fe0.2Nb0.1O3 − δ ceramic membranes

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Multi-phase ion-electron mixing conductor powder material, manufacturing method and application thereof

) than the uncoated BCFN in the partial oxidation of coke oven gas (COG). The maximum

Processing of dense nanocrystalline Bi 2O 3-Y 2O 3 solid electrolyte

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Decreasing the Polarization Resistance of BaCo0.7Fe0.2Nb0.1O3–δ Cathodes by Infiltration of Ce0.8Y0.2O2–δ

value of the SDC-coated BCFN is 18.28 mL·min-1·cm-2 under a COG/air flux of 177 mL·min-1/353 mL·min-1 at 875°C when the thickness of the BCFN membrane is 1 mm; this