Abstract
Direct synthesis by hot pressing has been used in order to produce high-efficiency Zn 4Sb 3bulk specimens. Single-phase Zn 4Sb 3 with 98.5% of theoretical density were successfully produced by direct hot pressing of elemental powders containing 1.2 at.% excess Zn. Thermoelectric properties as a function of temperature were investigated from room temperature to 600 K and compared with results of other studies. Transport properties at room temperature were also evaluated. Thermoelectric properties of single-phase Zn 4Sb 3 materials produced by direct synthesis were measured and are comparable to the published data. Direct synthesis by hot pressing provides an optional processing route in this material.
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