Optimum sintering temperature for thermoelectric properties of low-cost CuAl0.90Fe0.10O2 material

Siriwongrungson, Vilailuck; Sakulkalavek, Aparporn; Sakdanuphab, Rachsak

doi:10.1007/s10854-016-5227-5

Optimum sintering temperature for thermoelectric properties of low-cost CuAl0.90Fe0.10O2 material

Author(s)

Siriwongrungson, Vilailuck

Sakulkalavek, Aparporn

Sakdanuphab, Rachsak

Date Issued

October 1, 2016

Type

Article

DOI

10.1007/s10854-016-5227-5

Abstract

Sintering temperature is a key parameter that affects thermoelectric properties. In this study, a suitable temperature to synthesize thermoelectric properties of low-cost delafossite CuAl0.90Fe0.10O2 was investigated through the sintering of CuO, Al2O3 and Fe2O3 mixed powder at 1333, 1423 and 1473 K. The optimum sintering temperature is at 1333 K, where the single-phase CuAlO2 and the highest dimensionless figure of merit of 0.014 at the measured temperature of 873 K were observed. CuAlO2 with trace amounts of CuO, and CuAl2O4 and CuO were found at the sintering temperature of 1423 and 1473 K, respectively. The highest Seebeck coefficient and thermal conductivity was at the sintering temperature of 1473 K, with the maximum electrical conductivity and power factor at the measured temperature of 873 K of 5.7 Ω⁻¹ cm⁻¹ and 9.81 × 10⁻⁵ Wm⁻¹ K⁻², respectively.

Citation

Journal of Materials Science Materials in Electronics, 27(10), 11102-11109, 2016