Electrical conductivity and ionic transport number of Sr β-alumina single crystals prepared by a floating zone method

An Yu Zhang, Takaya Akashi, Bo Ping Zhang, Takashi Goto, Tao Zhang

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Sr β-alumina single crystals, Sr1-0.25xMg 1-xAl10+xO17+0.25x (0 ≤ x ≤ 0.41) were prepared in the SrO-MgO-Al2O3 system by a floating zone method. The single crystals had a cleavage plane, which is parallel to (001) plane. The electrical conductivity parallel (σ) and perpendicular (σ ⊥) to the cleavage plane had a maximum at x = 0.2. The σ ∥ was almost independent of oxygen partial pressure (PO 2), while σ⊥ showed a PO2-1/6 dependence in the low PO2 range (PO2 = 10 -4∼10-13 Pa). The ionic transport numbers measured by a d.c. polarization method were almost unity in air at 1073 K to 1573 K.

Original languageEnglish
Pages (from-to)2319-2323
Number of pages5
JournalSolid State Ionics
Volume176
Issue number29-30
DOIs
Publication statusPublished - 2005 Sep

Keywords

  • Electrical conductivity
  • Ionic transport number
  • Nonstoichiometric
  • Single crystal
  • Sr β-alumina

ASJC Scopus subject areas

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

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