High temperature transport properties of Ag-added (Ca 0.975La0.025)3Co4O9 ceramics

Ying Song; Ce Wen Nan

doi:10.1016/j.physb.2011.05.006

High temperature transport properties of Ag-added (Ca _0.975La_0.025)₃Co₄O₉ ceramics

Ying Song
, Ce Wen Nan^*

^*Corresponding author for this work

Tsinghua University
School of Chemistry and Chemical Engineering, Harbin Institute of Technology

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

22 Scopus citations

Abstract

Ag-added (Ca_0.975La_0.025)₃Co ₄O₉ ceramics were fabricated using spark plasma sintering from the precursor powder synthesized by a polyacrylamide gel method. The results indicated that Ag precipitated as a second phase in Ca ₃Co₄O₉ matrix. The addition of Ag was effective in enhancing the electrical conductivity and had a slight effect on Seebeck coefficient. In addition, the temperature dependence of electrical conductivity showed that the hole hopping conduction mechanism was dominant for the Ag-added (Ca_0.975La_0.025)₃Co₄O₉ ceramics. The activation energy remained unchanged with the increasing Ag content. The thermoelectric power factor of Ag-added (Ca_0.975La _0.025)₃Co₄O₉ ceramics reached about 5×10^-4 Wm^-1 K^-2 at 700 °C, suggesting a promising thermoelectric oxide candidate at high temperatures.

Original language	English
Pages (from-to)	2919-2923
Number of pages	5
Journal	Physica B: Condensed Matter
Volume	406
Issue number	14
DOIs	https://doi.org/10.1016/j.physb.2011.05.006
State	Published - 15 Jul 2011
Externally published	Yes

Keywords

Cobalt oxides
Polyacrylamide gel method
Spark plasma sintering
Transport properties

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10.1016/j.physb.2011.05.006

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title = "High temperature transport properties of Ag-added (Ca 0.975La0.025)3Co4O9 ceramics",

abstract = "Ag-added (Ca0.975La0.025)3Co 4O9 ceramics were fabricated using spark plasma sintering from the precursor powder synthesized by a polyacrylamide gel method. The results indicated that Ag precipitated as a second phase in Ca 3Co4O9 matrix. The addition of Ag was effective in enhancing the electrical conductivity and had a slight effect on Seebeck coefficient. In addition, the temperature dependence of electrical conductivity showed that the hole hopping conduction mechanism was dominant for the Ag-added (Ca0.975La0.025)3Co4O9 ceramics. The activation energy remained unchanged with the increasing Ag content. The thermoelectric power factor of Ag-added (Ca0.975La 0.025)3Co4O9 ceramics reached about 5×10-4 Wm-1 K-2 at 700 °C, suggesting a promising thermoelectric oxide candidate at high temperatures.",

keywords = "Cobalt oxides, Polyacrylamide gel method, Spark plasma sintering, Transport properties",

author = "Ying Song and Nan, \{Ce Wen\}",

year = "2011",

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doi = "10.1016/j.physb.2011.05.006",

language = "英语",

volume = "406",

pages = "2919--2923",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier B.V.",

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}

TY - JOUR

T1 - High temperature transport properties of Ag-added (Ca 0.975La0.025)3Co4O9 ceramics

AU - Song, Ying

AU - Nan, Ce Wen

PY - 2011/7/15

Y1 - 2011/7/15

N2 - Ag-added (Ca0.975La0.025)3Co 4O9 ceramics were fabricated using spark plasma sintering from the precursor powder synthesized by a polyacrylamide gel method. The results indicated that Ag precipitated as a second phase in Ca 3Co4O9 matrix. The addition of Ag was effective in enhancing the electrical conductivity and had a slight effect on Seebeck coefficient. In addition, the temperature dependence of electrical conductivity showed that the hole hopping conduction mechanism was dominant for the Ag-added (Ca0.975La0.025)3Co4O9 ceramics. The activation energy remained unchanged with the increasing Ag content. The thermoelectric power factor of Ag-added (Ca0.975La 0.025)3Co4O9 ceramics reached about 5×10-4 Wm-1 K-2 at 700 °C, suggesting a promising thermoelectric oxide candidate at high temperatures.

AB - Ag-added (Ca0.975La0.025)3Co 4O9 ceramics were fabricated using spark plasma sintering from the precursor powder synthesized by a polyacrylamide gel method. The results indicated that Ag precipitated as a second phase in Ca 3Co4O9 matrix. The addition of Ag was effective in enhancing the electrical conductivity and had a slight effect on Seebeck coefficient. In addition, the temperature dependence of electrical conductivity showed that the hole hopping conduction mechanism was dominant for the Ag-added (Ca0.975La0.025)3Co4O9 ceramics. The activation energy remained unchanged with the increasing Ag content. The thermoelectric power factor of Ag-added (Ca0.975La 0.025)3Co4O9 ceramics reached about 5×10-4 Wm-1 K-2 at 700 °C, suggesting a promising thermoelectric oxide candidate at high temperatures.

KW - Cobalt oxides

KW - Polyacrylamide gel method

KW - Spark plasma sintering

KW - Transport properties

UR - https://www.scopus.com/pages/publications/79957732439

U2 - 10.1016/j.physb.2011.05.006

DO - 10.1016/j.physb.2011.05.006

M3 - 文章

AN - SCOPUS:79957732439

SN - 0921-4526

VL - 406

SP - 2919

EP - 2923

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

IS - 14

ER -

High temperature transport properties of Ag-added (Ca _0.975La_0.025)₃Co₄O₉ ceramics

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Keywords

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