Preparation of tubular alumina membrane with uniform straight channels by anodic oxidation process

Y. Kobayashi; K. Iwasaki; T. Kyotani; A. Tomita

doi:10.1007/BF00354436

Preparation of tubular alumina membrane with uniform straight channels by anodic oxidation process

Y. Kobayashi, K. Iwasaki, T. Kyotani, A. Tomita

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Abstract

We prepared alumina tubes by an anodic oxidation process. The tube obtained was mechanically tough against a pressure of about 1 MPa from the outside of the tube. The tube was characterized by scanning electron microscopy (SEM) and a gas permeability measurement. The SEM observations revealed that this has uniform straight channels penetrating through the tube wall. The channels are vertical to the tube surface and their diameter is about 150 nm.The permeability of gas was measured with H₂, He, N₂, O₂ and CO₂ in the range of 0-100 kPa. The gas flow was mainly governed by Knudsen flow. This indicates the absence of big cracks in the tube.

Original language	English
Pages (from-to)	6185-6187
Number of pages	3
Journal	Journal of Materials Science
Volume	31
Issue number	23
DOIs	https://doi.org/10.1007/BF00354436
Publication status	Published - 1996 Jan 1

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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10.1007/BF00354436

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abstract = "We prepared alumina tubes by an anodic oxidation process. The tube obtained was mechanically tough against a pressure of about 1 MPa from the outside of the tube. The tube was characterized by scanning electron microscopy (SEM) and a gas permeability measurement. The SEM observations revealed that this has uniform straight channels penetrating through the tube wall. The channels are vertical to the tube surface and their diameter is about 150 nm.The permeability of gas was measured with H2, He, N2, O2 and CO2 in the range of 0-100 kPa. The gas flow was mainly governed by Knudsen flow. This indicates the absence of big cracks in the tube.",

author = "Y. Kobayashi and K. Iwasaki and T. Kyotani and A. Tomita",

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AU - Kobayashi, Y.

AU - Iwasaki, K.

AU - Kyotani, T.

AU - Tomita, A.

PY - 1996/1/1

Y1 - 1996/1/1

N2 - We prepared alumina tubes by an anodic oxidation process. The tube obtained was mechanically tough against a pressure of about 1 MPa from the outside of the tube. The tube was characterized by scanning electron microscopy (SEM) and a gas permeability measurement. The SEM observations revealed that this has uniform straight channels penetrating through the tube wall. The channels are vertical to the tube surface and their diameter is about 150 nm.The permeability of gas was measured with H2, He, N2, O2 and CO2 in the range of 0-100 kPa. The gas flow was mainly governed by Knudsen flow. This indicates the absence of big cracks in the tube.

AB - We prepared alumina tubes by an anodic oxidation process. The tube obtained was mechanically tough against a pressure of about 1 MPa from the outside of the tube. The tube was characterized by scanning electron microscopy (SEM) and a gas permeability measurement. The SEM observations revealed that this has uniform straight channels penetrating through the tube wall. The channels are vertical to the tube surface and their diameter is about 150 nm.The permeability of gas was measured with H2, He, N2, O2 and CO2 in the range of 0-100 kPa. The gas flow was mainly governed by Knudsen flow. This indicates the absence of big cracks in the tube.

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Preparation of tubular alumina membrane with uniform straight channels by anodic oxidation process

Abstract

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