Work

SPS-sintered NaTaO3–Fe2O3 composite exhibits enhanced Seebeck coefficient and electric current

Year: 2013

Type: article

Abstract: NaTaO 3 ––50 wt% Fe 2 O 3 composite ceramics showed a large Seebeck voltage of −300 mV at a temperature gradient of 650 K yielding a constant Seebeck coefficient of more than −500 μV/K over a wide temperature range. We report for the first time that spark plasma sintering (SPS) at low temperature (870 K) could maintain the short-circuit current of −80 μA, which makes this thermoelectric material a possible candidate for high-temperature applications up to 1,623 K. The reason for the good performance is the interface between Fe 2 O 3 and surrounding NaTaO 3 perovskite. When SPS is used, constitutional vacancies disappeared and the electric conductivity increases remarkably yielding ZT of 0.016.

Source: Materials for Renewable and Sustainable Energy

DOI: 10.1007/s40243-013-0021-2

Authors: Wilfried Wunderlich, Takao Mori, Oksana Sologub

Institutions: Tokai University, National Institute for Materials Science

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: gold

Estimated APC paid: $2,190