Preparation and properties of porous alumina ceramics with oriented cylindrical pores produced by an extrusion method

Toshihiro Isobe, Takahiro Tomita, Yoshikazu Kameshima, Akira Nakajima, Kiyoshi Okada

Research output: Contribution to journalArticle

83 Citations (Scopus)

Abstract

Porous alumina ceramics with unidirectionally-oriented pores were prepared by extrusion. Carbon fibers of 14 μm diameter and 600 μm length to be used as the pore-forming agent were kneaded with alumina, binder and dispersing agent. The resulting paste was extruded, dried at 110 °C, degreased at 1000 °C and fired at 1600 °C for 2 h. SEM showed a microstructure of dispersed highly oriented pores in a dense alumina matrix. The pore area in the cross section was 25.3% with about 1700 pores/mm2. The pore size distribution of the fired body measured by Hg porosimetry showed a sharp peak corresponding to the diameter of the burnt-out carbon fibers. The resulting porous alumina ceramics with 38% total porosity showed a fracture strength of 171 MPa and a Young's modulus of 132 GPa. This strength is significantly higher than the reported value for other porous alumina ceramics even though the present pore size is much larger.

Original languageEnglish
Pages (from-to)957-960
Number of pages4
JournalJournal of the European Ceramic Society
Volume26
Issue number6
DOIs
Publication statusPublished - 2006
Externally publishedYes

Fingerprint

Aluminum Oxide
Extrusion
Alumina
Carbon fibers
Pore size
Adhesive pastes
Ointments
Binders
Fracture toughness
Porosity
Elastic moduli
Microstructure
Scanning electron microscopy
carbon fiber

Keywords

  • AlO
  • Extrusion
  • Mechanical properties
  • Porous ceramics

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Preparation and properties of porous alumina ceramics with oriented cylindrical pores produced by an extrusion method. / Isobe, Toshihiro; Tomita, Takahiro; Kameshima, Yoshikazu; Nakajima, Akira; Okada, Kiyoshi.

In: Journal of the European Ceramic Society, Vol. 26, No. 6, 2006, p. 957-960.

Research output: Contribution to journalArticle

@article{1ad0bdaac85b49a3a489f09da76cade8,
title = "Preparation and properties of porous alumina ceramics with oriented cylindrical pores produced by an extrusion method",
abstract = "Porous alumina ceramics with unidirectionally-oriented pores were prepared by extrusion. Carbon fibers of 14 μm diameter and 600 μm length to be used as the pore-forming agent were kneaded with alumina, binder and dispersing agent. The resulting paste was extruded, dried at 110 °C, degreased at 1000 °C and fired at 1600 °C for 2 h. SEM showed a microstructure of dispersed highly oriented pores in a dense alumina matrix. The pore area in the cross section was 25.3{\%} with about 1700 pores/mm2. The pore size distribution of the fired body measured by Hg porosimetry showed a sharp peak corresponding to the diameter of the burnt-out carbon fibers. The resulting porous alumina ceramics with 38{\%} total porosity showed a fracture strength of 171 MPa and a Young's modulus of 132 GPa. This strength is significantly higher than the reported value for other porous alumina ceramics even though the present pore size is much larger.",
keywords = "AlO, Extrusion, Mechanical properties, Porous ceramics",
author = "Toshihiro Isobe and Takahiro Tomita and Yoshikazu Kameshima and Akira Nakajima and Kiyoshi Okada",
year = "2006",
doi = "10.1016/j.jeurceramsoc.2004.11.015",
language = "English",
volume = "26",
pages = "957--960",
journal = "Journal of the European Ceramic Society",
issn = "0955-2219",
publisher = "Elsevier BV",
number = "6",

}

TY - JOUR

T1 - Preparation and properties of porous alumina ceramics with oriented cylindrical pores produced by an extrusion method

AU - Isobe, Toshihiro

AU - Tomita, Takahiro

AU - Kameshima, Yoshikazu

AU - Nakajima, Akira

AU - Okada, Kiyoshi

PY - 2006

Y1 - 2006

N2 - Porous alumina ceramics with unidirectionally-oriented pores were prepared by extrusion. Carbon fibers of 14 μm diameter and 600 μm length to be used as the pore-forming agent were kneaded with alumina, binder and dispersing agent. The resulting paste was extruded, dried at 110 °C, degreased at 1000 °C and fired at 1600 °C for 2 h. SEM showed a microstructure of dispersed highly oriented pores in a dense alumina matrix. The pore area in the cross section was 25.3% with about 1700 pores/mm2. The pore size distribution of the fired body measured by Hg porosimetry showed a sharp peak corresponding to the diameter of the burnt-out carbon fibers. The resulting porous alumina ceramics with 38% total porosity showed a fracture strength of 171 MPa and a Young's modulus of 132 GPa. This strength is significantly higher than the reported value for other porous alumina ceramics even though the present pore size is much larger.

AB - Porous alumina ceramics with unidirectionally-oriented pores were prepared by extrusion. Carbon fibers of 14 μm diameter and 600 μm length to be used as the pore-forming agent were kneaded with alumina, binder and dispersing agent. The resulting paste was extruded, dried at 110 °C, degreased at 1000 °C and fired at 1600 °C for 2 h. SEM showed a microstructure of dispersed highly oriented pores in a dense alumina matrix. The pore area in the cross section was 25.3% with about 1700 pores/mm2. The pore size distribution of the fired body measured by Hg porosimetry showed a sharp peak corresponding to the diameter of the burnt-out carbon fibers. The resulting porous alumina ceramics with 38% total porosity showed a fracture strength of 171 MPa and a Young's modulus of 132 GPa. This strength is significantly higher than the reported value for other porous alumina ceramics even though the present pore size is much larger.

KW - AlO

KW - Extrusion

KW - Mechanical properties

KW - Porous ceramics

UR - http://www.scopus.com/inward/record.url?scp=30844445247&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=30844445247&partnerID=8YFLogxK

U2 - 10.1016/j.jeurceramsoc.2004.11.015

DO - 10.1016/j.jeurceramsoc.2004.11.015

M3 - Article

AN - SCOPUS:30844445247

VL - 26

SP - 957

EP - 960

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

SN - 0955-2219

IS - 6

ER -