Fabrication of oriented β-alumina from porous bodies by slip casting in a high magnetic field

Yoshio Sakka, Atsushi Honda, Tohru Suzuki, Yusuke Moriyoshi

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Designing texture is one possible way for improving the electrical, chemical, mechanical and other properties of ceramics. We have reported that oriented α-alumina was obtained by slip casting in a high magnetic field followed by sintering. β-Alumina is well known as sodium ion conductor used in a sodium-sulfur battery. β-Alumina consists of spinel blocks and ion conductive planes. Since the direction of the ion conductive plane of polycrystalline β-alumina is random, the ionic conductivity of the polycrystal is lower than that of the single crystal. The purpose of this study is to prepare oriented β-alumina to enhance the sodium ion conductivity. Oriented β-alumina was prepared by the following method: (1) oriented α-alumina green bodies were prepared by colloidal processing in a high magnetic field, (2) the oriented α-alumina green bodies were infiltrated with Na 2 O and MgO, and (3) the oriented β-alumina bodies were synthesized by reaction sintering at 1600 and 1700 °C. The reaction product and orientation of the β-alumina were confirmed by XRD.

Original languageEnglish
Pages (from-to)341-347
Number of pages7
JournalSolid State Ionics
Volume172
Issue number1-4 SPEC. ISS.
DOIs
Publication statusPublished - 2004 Aug 31
Externally publishedYes

Fingerprint

slip casting
Aluminum Oxide
Casting
Alumina
aluminum oxides
Magnetic fields
Fabrication
fabrication
magnetic fields
Ions
Sodium
sodium sulfur batteries
sintering
ions
Sintering
sodium
Polycrystals
polycrystals
Ionic conductivity
Reaction products

Keywords

  • β-Alumina
  • High magnetic field
  • Infiltration
  • Reaction sintering
  • Slip casting
  • Texture

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Fabrication of oriented β-alumina from porous bodies by slip casting in a high magnetic field. / Sakka, Yoshio; Honda, Atsushi; Suzuki, Tohru; Moriyoshi, Yusuke.

In: Solid State Ionics, Vol. 172, No. 1-4 SPEC. ISS., 31.08.2004, p. 341-347.

Research output: Contribution to journalArticle

Sakka, Yoshio ; Honda, Atsushi ; Suzuki, Tohru ; Moriyoshi, Yusuke. / Fabrication of oriented β-alumina from porous bodies by slip casting in a high magnetic field. In: Solid State Ionics. 2004 ; Vol. 172, No. 1-4 SPEC. ISS. pp. 341-347.
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