Electrical conductivity of non-stoichiometric Sr β-alumina single crystals prepared by a floating zone method

An Yu Zhang, Takaya Akashi, Takashi Goto

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Non-stoichiometric Sr β-alumina single crystals were prepared in SrO-MgO-Al2O3 system by a floating zone (FZ) method. The range of non-stoichiometry was determined as Sr1-0.25xMg1-xAl10+xO17+0.25x, where 0 < x ≤ 0.41. The lattice parameters of a increased and c decreased with increasing SrO content in the solid solution range. The single crystals had a cleavage plane parallel to the (001) plane and growth direction. The electrical conductivity parallel and perpendicular to the cleavage plane showed maximum at x = 0.2 (i.e., 13.8 mol% SrO). The activation energy of electrical conductivity parallel to the cleavage plane (140 to 165 kJ/mol) was almost the same as that perpendicular to the cleavage plane (150 to 170 kJ/mol).

Original languageEnglish
Pages (from-to)425-431
Number of pages7
JournalSolid State Ionics
Volume156
Issue number3-4
DOIs
Publication statusPublished - 2003 Jan 1

Keywords

  • Cell parameters
  • Electrical conductivity
  • Floating zone method
  • Single crystal
  • Single-phase region
  • Sr β-alumina

ASJC Scopus subject areas

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

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