Synthesis and electrical properties of Ce0.25Sr1.75(Ni1-yMy)O4-δ  (M = Fe, Co) (0 ≤ y ≤ 0.3)

Kouta Iwasaki; Hiroyuki Tanaka; Shunichi Kubota; Hisanori Yamane; Masahiko Shimada

doi:10.2497/jjspm.48.922

Synthesis and electrical properties of Ce_0.25Sr_1.75(Ni_1-yM_y)O_4-δ (M = Fe, Co) (0 ≤ y ≤ 0.3)

Kouta Iwasaki, Hiroyuki Tanaka, Shunichi Kubota, Hisanori Yamane, Masahiko Shimada

Center for Exploration of New Inorganic Materials

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

Abstract

Solid solutions of Ce_0.25Sr_1.75(Ni_1-yM_y)O_4-δ (M = Fe or Co, 0 ≤ y ≤ 0.3), having tetragonal K₂NiF₄-type structure, were synthesized at 1100°C under flowing O₂. The a and c-axis lengths of Ce_0.25Sr_1.75(Ni_1-yM_y)O_4-δ (a = 3.7999(1), c = 12.3760(2) Å for Ce_0.25Sr_1.75NiO_3.75 (y = 0; CeSr₇Ni₄O₁₅)) increased with increasing y (a = 3.8108(1), c = 12.4268(4) Å for Ce_0.25Sr_1.75Ni_0.7Fe_0.3 O_4-δ). Decrease of the a-axis length to 3.7975(1) Å and increase of the c-axis length to 12.4302(2) Å were observed by the substitution of Co to the composition of Ce_0.25Sr_1.75Ni_0.7Co_0.3 O_4-δ. Samples for characterization of the electrical properties were sintered at 1350°C and annealed at 1100°C under flowing O₂. The lowest electrical resistivity (1.7 - 3.1 × 10^-2 Ωcm at 20 - 800°C) among the solid solutions was measured for Ce_0.25Sr_1.75(Ni_0.7 Fe_0.3)O_4-δ. Seebeck coefficients of the solid solutions ranged from -22 to -38μVK^-1 around 450 - 500°C. The absolute values of the Seebeck coefficients decreased above or below this temperature.

Original language	English
Pages (from-to)	922-926
Number of pages	5
Journal	Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume	48
Issue number	10
DOIs	https://doi.org/10.2497/jjspm.48.922
Publication status	Published - 2001 Oct

Keywords

Cerium strontium nickel oxide
Electrical resistivity
KNiF type structure
Partial substitution
Solid solution

ASJC Scopus subject areas

Mechanical Engineering
Industrial and Manufacturing Engineering
Metals and Alloys
Materials Chemistry

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Synthesis and electrical properties of Ce_0.25Sr_1.75(Ni_1-yM_y)O_4-δ (M = Fe, Co) (0 ≤ y ≤ 0.3). / Iwasaki, Kouta; Tanaka, Hiroyuki; Kubota, Shunichi; Yamane, Hisanori; Shimada, Masahiko.

In: Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, Vol. 48, No. 10, 10.2001, p. 922-926.

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

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title = "Synthesis and electrical properties of Ce0.25Sr1.75(Ni1-yMy)O4-δ (M = Fe, Co) (0 ≤ y ≤ 0.3)",

abstract = "Solid solutions of Ce0.25Sr1.75(Ni1-yMy)O4-δ (M = Fe or Co, 0 ≤ y ≤ 0.3), having tetragonal K2NiF4-type structure, were synthesized at 1100°C under flowing O2. The a and c-axis lengths of Ce0.25Sr1.75(Ni1-yMy)O4-δ (a = 3.7999(1), c = 12.3760(2) {\AA} for Ce0.25Sr1.75NiO3.75 (y = 0; CeSr7Ni4O15)) increased with increasing y (a = 3.8108(1), c = 12.4268(4) {\AA} for Ce0.25Sr1.75Ni0.7Fe0.3 O4-δ). Decrease of the a-axis length to 3.7975(1) {\AA} and increase of the c-axis length to 12.4302(2) {\AA} were observed by the substitution of Co to the composition of Ce0.25Sr1.75Ni0.7Co0.3 O4-δ. Samples for characterization of the electrical properties were sintered at 1350°C and annealed at 1100°C under flowing O2. The lowest electrical resistivity (1.7 - 3.1 × 10-2 Ωcm at 20 - 800°C) among the solid solutions was measured for Ce0.25Sr1.75(Ni0.7 Fe0.3)O4-δ. Seebeck coefficients of the solid solutions ranged from -22 to -38μVK-1 around 450 - 500°C. The absolute values of the Seebeck coefficients decreased above or below this temperature.",

keywords = "Cerium strontium nickel oxide, Electrical resistivity, KNiF type structure, Partial substitution, Solid solution",

author = "Kouta Iwasaki and Hiroyuki Tanaka and Shunichi Kubota and Hisanori Yamane and Masahiko Shimada",

year = "2001",

month = oct,

doi = "10.2497/jjspm.48.922",

language = "English",

volume = "48",

pages = "922--926",

journal = "Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy",

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T1 - Synthesis and electrical properties of Ce0.25Sr1.75(Ni1-yMy)O4-δ (M = Fe, Co) (0 ≤ y ≤ 0.3)

AU - Iwasaki, Kouta

AU - Tanaka, Hiroyuki

AU - Kubota, Shunichi

AU - Yamane, Hisanori

AU - Shimada, Masahiko

PY - 2001/10

Y1 - 2001/10

N2 - Solid solutions of Ce0.25Sr1.75(Ni1-yMy)O4-δ (M = Fe or Co, 0 ≤ y ≤ 0.3), having tetragonal K2NiF4-type structure, were synthesized at 1100°C under flowing O2. The a and c-axis lengths of Ce0.25Sr1.75(Ni1-yMy)O4-δ (a = 3.7999(1), c = 12.3760(2) Å for Ce0.25Sr1.75NiO3.75 (y = 0; CeSr7Ni4O15)) increased with increasing y (a = 3.8108(1), c = 12.4268(4) Å for Ce0.25Sr1.75Ni0.7Fe0.3 O4-δ). Decrease of the a-axis length to 3.7975(1) Å and increase of the c-axis length to 12.4302(2) Å were observed by the substitution of Co to the composition of Ce0.25Sr1.75Ni0.7Co0.3 O4-δ. Samples for characterization of the electrical properties were sintered at 1350°C and annealed at 1100°C under flowing O2. The lowest electrical resistivity (1.7 - 3.1 × 10-2 Ωcm at 20 - 800°C) among the solid solutions was measured for Ce0.25Sr1.75(Ni0.7 Fe0.3)O4-δ. Seebeck coefficients of the solid solutions ranged from -22 to -38μVK-1 around 450 - 500°C. The absolute values of the Seebeck coefficients decreased above or below this temperature.

AB - Solid solutions of Ce0.25Sr1.75(Ni1-yMy)O4-δ (M = Fe or Co, 0 ≤ y ≤ 0.3), having tetragonal K2NiF4-type structure, were synthesized at 1100°C under flowing O2. The a and c-axis lengths of Ce0.25Sr1.75(Ni1-yMy)O4-δ (a = 3.7999(1), c = 12.3760(2) Å for Ce0.25Sr1.75NiO3.75 (y = 0; CeSr7Ni4O15)) increased with increasing y (a = 3.8108(1), c = 12.4268(4) Å for Ce0.25Sr1.75Ni0.7Fe0.3 O4-δ). Decrease of the a-axis length to 3.7975(1) Å and increase of the c-axis length to 12.4302(2) Å were observed by the substitution of Co to the composition of Ce0.25Sr1.75Ni0.7Co0.3 O4-δ. Samples for characterization of the electrical properties were sintered at 1350°C and annealed at 1100°C under flowing O2. The lowest electrical resistivity (1.7 - 3.1 × 10-2 Ωcm at 20 - 800°C) among the solid solutions was measured for Ce0.25Sr1.75(Ni0.7 Fe0.3)O4-δ. Seebeck coefficients of the solid solutions ranged from -22 to -38μVK-1 around 450 - 500°C. The absolute values of the Seebeck coefficients decreased above or below this temperature.

KW - Cerium strontium nickel oxide

KW - Electrical resistivity

KW - KNiF type structure

KW - Partial substitution

KW - Solid solution

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