Oxide ion and electron transport properties in lanthanum silicate oxyapatite ceramics

Atsushi Mineshige, Hiroyuki Mieda, Mitsuaki Manabe, Takahiro Funahashi, Yusuke Daiko, Tetsuo Yazawa, Mina Nishi, Katsuhiko Yamaji, Teruhisa Horita, Koji Amezawa, Keiji Yashiro, Tatsuya Kawada, Hideki Yoshioka

研究成果: Article査読

13 被引用数 (Scopus)


An oxygen-excess-type lanthanum silicate (LSO) solid electrolyte with high chemical stability as well as high ion conductivity was developed by optimizing the chemical composition, La9.333 + x(Si6 - yAl y)O26 + 1.5x - 0.5y. It was found that La 10(Si5.8Al0.2)O26.9 (x = 0.667, y = 0.2) exhibited the highest conductivity among them, and addition of a small amount of iron was effective for the improvement of its chemical stability. The LSO specimen of x = 0.667 and y = 0.2 with iron addition (0.5 mol%) was chemically stable and had a conductivity of 5.6 × 10- 2 S cm- 1 under air at 1073 K, while its electronic conductivity was less than 2.0 × 10- 4 S cm- 1 at the same temperature. The oxygen tracer diffusion coefficient, DO* of this material was determined as 2.0 × 10- 8 cm2 s- 1 at 1073 K.

ジャーナルSolid State Ionics
出版ステータスPublished - 2014 9月 1

ASJC Scopus subject areas

  • 化学一般
  • 材料科学一般
  • 凝縮系物理学


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