Fabrication of Ti_1−<i>x</i>Cr_<i>x</i>O_<i>z</i> and Analysis of Its Microstructure and Thermoelectric Properties

• Sagara Katsuhiro

  Graduate School & Faculty of Engineering, Chiba University

• Lu Yun

  Graduate School & Faculty of Engineering, Chiba University

• Kikuchi Yuta

  Graduate School & Faculty of Engineering, Chiba University

• Nozue Takahiro

  Graduate School & Faculty of Engineering, Chiba University

• Ogura Satoshi

  Graduate School & Faculty of Engineering, Chiba University

• Yoshida Hiroyuki

  Chiba Industrial Technology Research Institute

• Asanuma Hiroshi

  Graduate School & Faculty of Engineering, Chiba University

Bibliographic Information

Other Title

• Ti_1−<i>x</i>Cr_<i>x</i>O_<i>z</i> の作製およびその組織と熱電特性の解析
• Ti₁₋xCr[x]Ozの作製およびその組織と熱電特性の解析
• Ti ₁ ₋ xCr[x]Oz ノ サクセイ オヨビ ソノ ソシキ ト ネツデントクセイ ノ カイセキ
• Fabrication of Ti1^|^minus;xCrxOz and Analysis of Its Microstructure and Thermoelectric Properties

Abstract

  To obtain Ti_1−xCr_xO_z, mixed powder of TiO₂ and Cr powders was sintered in a graphite die by spark plasma sintering (SPS). The composition and the microstructure of the sintered compacts were examined by XRD and SEM. In addition, the thermoelectric properties of the sintered compacts were measured, the relationship of the thermoelectric properties and phases was also discussed. The results showed that the multiphase with compositions of Ti_nO_2n−1, TiCrO₃ and Cr was obtained. The phases formed in a transformation from the rutile type TiO₂ to TiCrO₃ with the reduction during SPS and an increase in Cr additive fraction. The electrical resistivity of the sintered compacts greatly decreased due to an increase in Cr additive fraction. The thermoelectric performance of the sintered compacts was enhanced obviously, and the largest power factor of Ti_1−xCr_xO_z with x=0.25 reached 0.57 mW/K²m at 973 K.<br>

Journal

• Journal of the Japan Institute of Metals and Materials

  Journal of the Japan Institute of Metals and Materials 78 (3), 109-116, 2014

  The Japan Institute of Metals and Materials

Keywords

• titanium oxide
• thermoelectric property
• metal addition
• shear structure
• Magnéli phase

Details

• CRID: 1390282681458238208
• NII Article ID: 130004456414
• NII Article ID: 40020008575
• NII Book ID: AN00187860
• DOI: 10.2320/jinstmet.j2013071
• ISSN: 18806880
• ISSN: 24337501
• ISSN: 00214876
• NDL BIB ID: 025325693
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I025325693
• Web Site: https://www.jstage.jst.go.jp/article/jinstmet/78/3/78_J2013071/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed