Work

Fabrication of Ti1^|^minus;xCrxOz and Analysis of Its Microstructure and Thermoelectric Properties

Year: 2014

Type: article

Abstract: To obtain Ti1−xCrxOz, 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 TinO2n−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 Ti1−xCrxOz with x=0.25 reached 0.57 mW/K2m at 973 K.

Source: Journal of the Japan Institute of Metals and Materials

DOI: 10.2320/jinstmet.j2013071

Authors: Katsuhiro Sagara, Yun Lu, Yuta Kikuchi, Takahiro Nozue, Satoshi Ogura, Hiroyuki Yoshida, Hiroshi Asanuma

Institutions: Chiba University, Chiba Industrial Technology Research Institute

Language: English

Topic: Advanced Thermoelectric Materials and Devices

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: diamond

OpenAlex ID: W2318673705

FWCI:

Cites: 19

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Related to: 10