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Bulk skutterudite(FeNi)_xCo_(4-x)Sb_(12) with x varying from 0.05 to 1.0 were prepared by mechanical alloying and spark plasma sintering(MA-SPS).The phases of the samples were analyzed by X-ray diffraction,and their thermoelectrical properties were tested by electrical constant instrument and laser thermal constant instrument.The experimental results show that bulk (FeNi)_xCo_(4-x)Sb_(12) have the characteristic of typical semiconductor electricity.The addition of FeNi improves the electrical properties to a large extent;the samples of bulk(FeNi)-xCo_(4-x)Sb_(12)(x=0.05-1.0)are n-type semiconducting materials;the increase of FeNi con- tent can decrease the absolute value of Seebeck coefficient and therefore decrease the ZT value;FeNi with a higher content when x>0.5 leads to an evident increase in thermal conductivity and also a decrease in ZT value.In general,for ZT value,the optimal added content of FeNi is 0.25-0.5 and the maximum ZT value is 0.2467 when x=0.5 at 500℃.
Bulk skutterudite (FeNi) x Co 4-x Sb 12 with x varying from 0.05 to 1.0 were prepared by mechanical alloying and spark plasma sintering (MA-SPS). The phases of the samples were analyzed by X-ray diffraction, and their thermoelectrical properties were tested by electrical constant instrument and laser thermal constant instrument. The experimental results show that bulk (FeNi) _xCo_ (4-x) Sb_ (12) have the characteristic of typical semiconductor electricity. The addition of FeNi improves the electrical The samples of bulk (FeNi) -xCo 4-x Sb 12 (x = 0.05-1.0) are n-type semiconducting materials; the increase of FeNi temp can decrease the absolute value of Seebeck coefficient and therefore decrease the ZT value; FeNi with a higher content when x> 0.5 leads to an evident increase in thermal conductivity and also a decrease in ZT value. general, for ZT value, the optimal added content of FeNi is 0.25 -0.5 and the maximum ZT value is 0.2467 when x = 0.5 at 500 ° C.