论文信息 - The effect of titanium diboride addition on the thermoelectric properties of β-FeSi2 semiconductors

The effect of titanium diboride addition on the thermoelectric properties of β-FeSi2 semiconductors

Abstract β-FeSi 2 –TiB 2 composites with various amounts of TiB 2 , from 0 up to 30 vol%, were prepared by hot pressing. The electrical and thermal conductivities, and the Seebeck coefficient were measured as a function of temperature. The results show that the thermal and electrical transport behavior of the composites is different as the volume fraction of TiB 2 is below and above about 0.255. A 5 vol% TiB 2 added sample has higher figure of merit than one without TiB 2 for temperatures above 650 K. The influence of an additional phase, e-FeSi, formed during the hot pressing, on the thermoelectric properties of the β-FeSi 2 –TiB 2 composites was also discussed.

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