Electrical conductivity of nonstoichiometric Ba β-alumina single crystals prepared by a floating zone method

An Yu Zhang, Takaya Akashi, Takashi Goto

研究成果: Article査読

3 被引用数 (Scopus)

抄録

Nonstoichiometric Ba β-alumina single crystals, Ba1 - 0.25xMg1 - xAl10 + xO17 + 0.25x (0 ≤ x ≤ 1), were prepared in the BaO-MgO-Al2O3 system by a floating zone method. The single crystals were cleaved parallel to a (001) plane. The electrical conductivity parallel to the cleavage plane (σ //) was 10 to 20 times greater than that perpendicular to the cleavage plane (σ). The σ// and σ had the maximum at around x = 0.5. The activation energy of σ, 240 to 270 kJ/mol, was slightly greater than that of σ//, 170 to 190 kJ/mol. The σ// was almost independent of oxygen partial pressure (PO2), while σ showed a PO2-1/6 dependence in a low PO2 region of PO2 = 10-4 to 10 -13 Pa.

本文言語English
ページ(範囲)77-82
ページ数6
ジャーナルSolid State Ionics
166
1-2
DOI
出版ステータスPublished - 2004 1 15

ASJC Scopus subject areas

  • 化学 (全般)
  • 材料科学(全般)
  • 凝縮系物理学

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