Rapid Hot Pressing of In-doped Ag_0.8Pb₁₈SbTe₂₀ Thermoelectric Material and its Properties AITranslate

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Chinese Library Classification Number:TN377[电子电信—物理电子学]

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The influences of rapid hot pressing and In doping on the microstructure and thermoelectric properties of Ag0.8Pb18SbTe20 were investigated.The n-type Ag0.8Pb18InxSb1-xTe20（x=0.25,0.5,0.75,1） powder alloy is prepared successfully by vacuum sealed melting,and the powder particle size can reach a micron level by high energy ball milling.Rapid hot-pressing sintering was adopted to prepare lumpy thermoelectric material at 693 K and 15 MPa for 30 min.The results show that the substitution of In for Sb enhances the conductivity of the thermoelectric material and thus improves its thermoelectric properties.The max.electrical conductivity at 623 K is up to 239 S/cm when the In dosage x is equal to 1.And the power factor reaches a maximum of 3.1×10-3 W/（m·K2） at the same temperature but with x equal to 0.5.