Oxygen permeation measurement of La1-xCaxCrO3-δ by using an electrochemical method

Natsuko Sakai; Teruhisa Horita; Harumi Yokokawa; Masayuki Dokiya; Tatsuya Kawada

doi:10.1016/0167-2738(96)00300-1

Oxygen permeation measurement of La_1-xCa_xCrO_3-δ by using an electrochemical method

Natsuko Sakai, Teruhisa Horita, Harumi Yokokawa, Masayuki Dokiya, Tatsuya Kawada

ENV - Environmental Studies for Advanced Society

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

9 Citations (Scopus)

Abstract

Oxygen permeation current density (J_O2-) through La_0.9Ca_0.11CrO_3-δ was measured by using an electrochemical method under an oxygen potential gradient, P(O₂) = 1 ∼ 1 × 10^-13 bar. The oxygen vacancy diffusion coefficient (D_v) is estimated 1.5 × 10^-10 m² s^-1 in the P(O₂) range from 10^-5 to 10^-10 bar. The oxygen permeation current density through 1 mm thick plate is estimated as 10 mA cm^-2 in SOFC operation condition. The oxygen tracer diffusion coefficients via bulk (D*) and via grain boundary (D*_gb) were estimated by SIMS for La_1-x(Ca_xCrO_3-δ (x = 0.1, 0.2). The contribution of grain boundary diffusion on permeation was considered in the oxidizing atmosphere, however, the bulk diffusion is dominant in a large oxygen potential gradient.

Original language	English
Pages (from-to)	1273-1278
Number of pages	6
Journal	Solid State Ionics
Volume	86-88
Issue number	PART 2
DOIs	https://doi.org/10.1016/0167-2738(96)00300-1
Publication status	Published - 1996 Jul

Keywords

Chromium
Diffusion
Lanthanum
Leak
Oxygen
Permeation
SOFC

ASJC Scopus subject areas

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

Access to Document

10.1016/0167-2738(96)00300-1

Cite this

@article{dd0b0d51610a4eca8f2e75c4a5f72d75,

title = "Oxygen permeation measurement of La1-xCaxCrO3-δ by using an electrochemical method",

abstract = "Oxygen permeation current density (JO2-) through La0.9Ca0.11CrO3-δ was measured by using an electrochemical method under an oxygen potential gradient, P(O2) = 1 ∼ 1 × 10-13 bar. The oxygen vacancy diffusion coefficient (Dv) is estimated 1.5 × 10-10 m2 s-1 in the P(O2) range from 10-5 to 10-10 bar. The oxygen permeation current density through 1 mm thick plate is estimated as 10 mA cm-2 in SOFC operation condition. The oxygen tracer diffusion coefficients via bulk (D*) and via grain boundary (D*gb) were estimated by SIMS for La1-x(CaxCrO3-δ (x = 0.1, 0.2). The contribution of grain boundary diffusion on permeation was considered in the oxidizing atmosphere, however, the bulk diffusion is dominant in a large oxygen potential gradient.",

keywords = "Chromium, Diffusion, Lanthanum, Leak, Oxygen, Permeation, SOFC",

author = "Natsuko Sakai and Teruhisa Horita and Harumi Yokokawa and Masayuki Dokiya and Tatsuya Kawada",

year = "1996",

month = jul,

doi = "10.1016/0167-2738(96)00300-1",

language = "English",

volume = "86-88",

pages = "1273--1278",

journal = "Solid State Ionics",

issn = "0167-2738",

publisher = "Elsevier",

number = "PART 2",

}

TY - JOUR

T1 - Oxygen permeation measurement of La1-xCaxCrO3-δ by using an electrochemical method

AU - Sakai, Natsuko

AU - Horita, Teruhisa

AU - Yokokawa, Harumi

AU - Dokiya, Masayuki

AU - Kawada, Tatsuya

PY - 1996/7

Y1 - 1996/7

N2 - Oxygen permeation current density (JO2-) through La0.9Ca0.11CrO3-δ was measured by using an electrochemical method under an oxygen potential gradient, P(O2) = 1 ∼ 1 × 10-13 bar. The oxygen vacancy diffusion coefficient (Dv) is estimated 1.5 × 10-10 m2 s-1 in the P(O2) range from 10-5 to 10-10 bar. The oxygen permeation current density through 1 mm thick plate is estimated as 10 mA cm-2 in SOFC operation condition. The oxygen tracer diffusion coefficients via bulk (D*) and via grain boundary (D*gb) were estimated by SIMS for La1-x(CaxCrO3-δ (x = 0.1, 0.2). The contribution of grain boundary diffusion on permeation was considered in the oxidizing atmosphere, however, the bulk diffusion is dominant in a large oxygen potential gradient.

AB - Oxygen permeation current density (JO2-) through La0.9Ca0.11CrO3-δ was measured by using an electrochemical method under an oxygen potential gradient, P(O2) = 1 ∼ 1 × 10-13 bar. The oxygen vacancy diffusion coefficient (Dv) is estimated 1.5 × 10-10 m2 s-1 in the P(O2) range from 10-5 to 10-10 bar. The oxygen permeation current density through 1 mm thick plate is estimated as 10 mA cm-2 in SOFC operation condition. The oxygen tracer diffusion coefficients via bulk (D*) and via grain boundary (D*gb) were estimated by SIMS for La1-x(CaxCrO3-δ (x = 0.1, 0.2). The contribution of grain boundary diffusion on permeation was considered in the oxidizing atmosphere, however, the bulk diffusion is dominant in a large oxygen potential gradient.

KW - Chromium

KW - Diffusion

KW - Lanthanum

KW - Leak

KW - Oxygen

KW - Permeation

KW - SOFC

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SN - 0167-2738

VL - 86-88

SP - 1273

EP - 1278

JO - Solid State Ionics

JF - Solid State Ionics

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