Effects of Ag addition on microstructure and thermoelectric properties of NaxCo2O4 synthesized by citric acid complex process

• Ito Mikio

  Course of Materials Science and Engineering, Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University

• Furumoto Daisuke

  Course of Materials Science and Engineering, Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University

書誌事項

タイトル別名

• Effects of Ag Addition on Microstructure and Thermoelectric Properties of Na<I><SUB>x</SUB></I>Co<SUB>2</SUB>O<SUB>4</SUB> Synthesized by Citric Acid Complex Process

抄録

A thermoelectric Na_xCo₂O₄/Ag composite was synthesized by citric acid complex process using CH₃COOAg as an Ag source. The powder precursor after calcination was composed of plate-like Na_xCo₂O₄ grains and Ag particles. The Ag addition deteriorated crystallographic anisotropy of the sintered body. However, the electrical resistivity and the Seebeck coefficient of this composite were significantly smaller and slightly larger, respectively, than those of the sample without Ag, resulting in lager power factor. The Ag phase dispersed in the Na_xCo₂O₄ matrix contained about 5–17 at.% Co, which is considered to cause the increase in Seebeck coefficient.

収録刊行物

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 48 (12), 3160-3163, 2007

  公益社団法人 日本金属学会

キーワード

• thermoelectric oxide
• citric acid complex process
• oxide-metal composite
• crystallographic anisotropy
• thermoelectric properties

詳細情報

• CRID: 1390001204250827392
• NII論文ID: 10020008089
• NII論文ID: 130004453454
• NII書誌ID: AA1151294X
• DOI: 10.2320/matertrans.mra2007171
• ISSN: 13475320
• ISSN: 13459678
• NDL書誌ID: 9280572
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9280572
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/48/12/48_MRA2007171/_pdf
• 本文言語コード: en
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