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

doi:10.1016/j.ssi.2014.04.009

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

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

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, La_{9.333 + x}(Si_{6 - y}Al _y)O_{26 + 1.5x - 0.5y}. It was found that La ₁₀(Si_5.8Al_0.2)O_26.9 (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, D_O* of this material was determined as 2.0 × 10^{- 8} cm² s^{- 1} at 1073 K.

Original language	English
Pages (from-to)	555-558
Number of pages	4
Journal	Solid State Ionics
Volume	262
DOIs	https://doi.org/10.1016/j.ssi.2014.04.009
Publication status	Published - 2014 Sept 1

Keywords

Apatite
Diffusion coefficient
Lanthanum silicate
Oxyapatite
Solid electrolyte
Solid oxide fuel cell

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10.1016/j.ssi.2014.04.009

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title = "Oxide ion and electron transport properties in lanthanum silicate oxyapatite ceramics",

abstract = "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.",

keywords = "Apatite, Diffusion coefficient, Lanthanum silicate, Oxyapatite, Solid electrolyte, Solid oxide fuel cell",

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

note = "Funding Information: This work was partially supported by Grant-in-Aid for Scientific Research (C) ( 24550235 ), Japan Society for the Promotion of Science (JSPS) .",

year = "2014",

month = sep,

day = "1",

doi = "10.1016/j.ssi.2014.04.009",

language = "English",

volume = "262",

pages = "555--558",

journal = "Solid State Ionics",

issn = "0167-2738",

publisher = "Elsevier",

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TY - JOUR

T1 - Oxide ion and electron transport properties in lanthanum silicate oxyapatite ceramics

AU - Mineshige, Atsushi

AU - Mieda, Hiroyuki

AU - Manabe, Mitsuaki

AU - Funahashi, Takahiro

AU - Daiko, Yusuke

AU - Yazawa, Tetsuo

AU - Nishi, Mina

AU - Yamaji, Katsuhiko

AU - Horita, Teruhisa

AU - Amezawa, Koji

AU - Yashiro, Keiji

AU - Kawada, Tatsuya

AU - Yoshioka, Hideki

N1 - Funding Information: This work was partially supported by Grant-in-Aid for Scientific Research (C) ( 24550235 ), Japan Society for the Promotion of Science (JSPS) .

PY - 2014/9/1

Y1 - 2014/9/1

N2 - 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.

AB - 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.

KW - Apatite

KW - Diffusion coefficient

KW - Lanthanum silicate

KW - Oxyapatite

KW - Solid electrolyte

KW - Solid oxide fuel cell

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SP - 555

EP - 558

JO - Solid State Ionics

JF - Solid State Ionics

ER -

Oxide ion and electron transport properties in lanthanum silicate oxyapatite ceramics

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