Preparation and properties of porous alumina ceramics with uni-directionally oriented pores by extrusion method using a plastic substance as a pore former

Toshihiro Isobe, Yoshikazu Kameshima, Akira Nakajima, Kiyoshi Okada

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

Porous alumina ceramics with uni-directionally aligned pores were prepared by an extrusion method using 0-40 vol.% poly (vinyl acetate) (PVAC) as the pore former. A paste was prepared by mixing 25 mass% distilled water, 4 mass% methylcellulose, 8 mass% oleic acid and 0.8 mass% ammonium poly (carboxylic acid). This paste was molded into a 10 mm Ø body using a ram-type extruder, dried at room temperature for 24 h, calcined at 600 °C for 1 h and sintered at 1500 °C for 2 h in air. The PVAC added to the paste was homogeneously dispersed and formed particles 0.1-150 μm in size which extended in the extrusion direction and were converted to through-hole pores after sintering. The resulting pore size distribution in the samples was bimodal, centered at about 0.4 μm with a broad peak at about 70 μm dia. The resulting porous alumina ceramics showed high gas permeability because of their uni-directionally oriented through-hole pore structure.

Original languageEnglish
Pages (from-to)61-66
Number of pages6
JournalJournal of the European Ceramic Society
Volume27
Issue number1
DOIs
Publication statusPublished - 2007
Externally publishedYes

Fingerprint

Aluminum Oxide
Ointments
Extrusion
Alumina
Plastics
Gas permeability
Oleic acid
Extruders
Pore structure
Carboxylic acids
Pore size
Methylcellulose
Sintering
Oleic Acid
Carboxylic Acids
Ammonium Compounds
Air
Water
Temperature
vinyl acetate

Keywords

  • AlO
  • Extrusion
  • Permeability
  • Porosity

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

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title = "Preparation and properties of porous alumina ceramics with uni-directionally oriented pores by extrusion method using a plastic substance as a pore former",
abstract = "Porous alumina ceramics with uni-directionally aligned pores were prepared by an extrusion method using 0-40 vol.{\%} poly (vinyl acetate) (PVAC) as the pore former. A paste was prepared by mixing 25 mass{\%} distilled water, 4 mass{\%} methylcellulose, 8 mass{\%} oleic acid and 0.8 mass{\%} ammonium poly (carboxylic acid). This paste was molded into a 10 mm {\O} body using a ram-type extruder, dried at room temperature for 24 h, calcined at 600 °C for 1 h and sintered at 1500 °C for 2 h in air. The PVAC added to the paste was homogeneously dispersed and formed particles 0.1-150 μm in size which extended in the extrusion direction and were converted to through-hole pores after sintering. The resulting pore size distribution in the samples was bimodal, centered at about 0.4 μm with a broad peak at about 70 μm dia. The resulting porous alumina ceramics showed high gas permeability because of their uni-directionally oriented through-hole pore structure.",
keywords = "AlO, Extrusion, Permeability, Porosity",
author = "Toshihiro Isobe and Yoshikazu Kameshima and Akira Nakajima and Kiyoshi Okada",
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AU - Isobe, Toshihiro

AU - Kameshima, Yoshikazu

AU - Nakajima, Akira

AU - Okada, Kiyoshi

PY - 2007

Y1 - 2007

N2 - Porous alumina ceramics with uni-directionally aligned pores were prepared by an extrusion method using 0-40 vol.% poly (vinyl acetate) (PVAC) as the pore former. A paste was prepared by mixing 25 mass% distilled water, 4 mass% methylcellulose, 8 mass% oleic acid and 0.8 mass% ammonium poly (carboxylic acid). This paste was molded into a 10 mm Ø body using a ram-type extruder, dried at room temperature for 24 h, calcined at 600 °C for 1 h and sintered at 1500 °C for 2 h in air. The PVAC added to the paste was homogeneously dispersed and formed particles 0.1-150 μm in size which extended in the extrusion direction and were converted to through-hole pores after sintering. The resulting pore size distribution in the samples was bimodal, centered at about 0.4 μm with a broad peak at about 70 μm dia. The resulting porous alumina ceramics showed high gas permeability because of their uni-directionally oriented through-hole pore structure.

AB - Porous alumina ceramics with uni-directionally aligned pores were prepared by an extrusion method using 0-40 vol.% poly (vinyl acetate) (PVAC) as the pore former. A paste was prepared by mixing 25 mass% distilled water, 4 mass% methylcellulose, 8 mass% oleic acid and 0.8 mass% ammonium poly (carboxylic acid). This paste was molded into a 10 mm Ø body using a ram-type extruder, dried at room temperature for 24 h, calcined at 600 °C for 1 h and sintered at 1500 °C for 2 h in air. The PVAC added to the paste was homogeneously dispersed and formed particles 0.1-150 μm in size which extended in the extrusion direction and were converted to through-hole pores after sintering. The resulting pore size distribution in the samples was bimodal, centered at about 0.4 μm with a broad peak at about 70 μm dia. The resulting porous alumina ceramics showed high gas permeability because of their uni-directionally oriented through-hole pore structure.

KW - AlO

KW - Extrusion

KW - Permeability

KW - Porosity

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