Strength and Densification of Ni/Al2O3 Membrane Compacted with Uniaxial Pressing and CIP for Hydrogen Separation: Influence of Pressing Process

Supawan Vichaphund; Duangduen Atong

doi:10.4028/www.scientific.net/MSF.658.25

Paper Titles

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Synthesis and Electronic Transport Properties of Sn-Doped CoSb₃
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Strength and Densification of Ni/Al₂O₃ Membrane Compacted with Uniaxial Pressing and CIP for Hydrogen Separation: Influence of Pressing Process
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Effect of Complexing Agent on Morphology and Crystal Structure of La_1-xCe_xCoO₃ (x=0, 0.2, and 0.4) Perovskite-Type Mixed Oxides Catalyst Prepared by Sol-Gel Method
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Synthesis and Thermoelectric Properties of Half-Heusler Zr-Ni-Sn Alloy Processed by Mechanically Alloying and Hot Pressing
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Preferential Oxidation of CO over Pt Catalysts Supported on Mesoporous Aluminosilicates in the Presence of H₂
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Synthesis and Characterization of Poly(ether ketone) Containing Side Sulfonic Acid Group for Proton Exchange Membrane Fuel Cell
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HomeMaterials Science ForumMaterials Science Forum Vol. 658Strength and Densification of Ni/Al2O3 Membrane...

Strength and Densification of Ni/Al₂O₃ Membrane Compacted with Uniaxial Pressing and CIP for Hydrogen Separation: Influence of Pressing Process

Abstract:

In our previous studies, 10-40wt%Ni/Al2O3 membrane was prepared by uniaxial pressing and sintered at 900 to 1400°C for 2 h. It was found that 10wt%Ni/Al2O3 membrane sintered at 1400°C showed the highest physical and mechanical properties. Thus, this work we focused on the effect of different pressing processes on the properties of Ni/Al2O3 membrane with longer soaking time. Firstly, 10-40wt%Ni and Al2O3 powders were mixed by dried ball-milling. Then, the mixture powder was pressed to form a bar shape by two different processes; uniaxially pressing (No CIP) and uniaxially pressing followed by cold isostatic pressing (CIP) at 250 MPa for 5 min. All Ni/Al2O3 specimens from two pressing routes were sintered at 1400°C for 4h under air atmosphere and reduced at 900 °C under H2 (99.99%). From the results, it was found that the densification process affected to physical and mechanical properties of Ni/Al2O3. The CIPed - 10wt%Ni/Al2O3 membrane sintered at 1400°C for 4 h showed the highest relative density and flexural strength of 76% and 106 MPa with the lowest pore size (78 nm) and 17% porosity. The addition of nickel content gradually decreased physical and mechanical properties of Ni/Al2O3.