Electrical properties of Nb-doped SrTiO3 ceramics with excess TiO2 for anodes and interconnects of SOFCs

Fumimasa Horikiri, Li Qun Han, Naofumi Iizawa, Kazuhisa Sato, Keiji Yashiro, Tatsuya Kawada, Junichiro Mizusaki

研究成果: Conference contribution

抄録

The electrical properties of Nb-doped SrTiO3 ceramics with and without excess TiO2 were investigated for anodes and interconnects of solid oxide fuel cells (SOFCs) by a DC 4-probe conductivity measurement. The microstructures and the grain boundary properties were revealed by SEM, EDX, SEM-EBSP-OIM and HRTEM. It was found that addition of excess TiO2 reduces the influence of the grain boundary on the conductivity of Nb-doped SrTiO3 ceramics, and the conductivity turned to be metallic in SOFCs operating temperatures The second phases such as TiO2 and Nb 2O5 were found in the composition of excess TiO 2. No grain boundary segregation was found, and randomly distributed grain boundaries were found predominant in the Nb-doped SrTiO3 ceramics with and without excess TiO2. The defects at the grain boundary were discussed.

本文言語English
ホスト出版物のタイトルECS Transactions - 10th International Symposium on Solid Oxide Fuel Cells, SOFC-X
ページ1639-1644
ページ数6
1 PART 2
DOI
出版ステータスPublished - 2007 12 1
イベント10th International Symposium on Solid Oxide Fuel Cells, SOFC-X - , Japan
継続期間: 2007 6 32007 6 8

出版物シリーズ

名前ECS Transactions
番号1 PART 2
7
ISSN(印刷版)1938-5862
ISSN(電子版)1938-6737

Other

Other10th International Symposium on Solid Oxide Fuel Cells, SOFC-X
CountryJapan
Period07/6/307/6/8

ASJC Scopus subject areas

  • Engineering(all)

フィンガープリント 「Electrical properties of Nb-doped SrTiO<sub>3</sub> ceramics with excess TiO<sub>2</sub> for anodes and interconnects of SOFCs」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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