机械合金化及等离子体烧结法制备Skutterudite热电材料Fe_xCo_(4-x)Sb_(12)

Synthesis of Skutterudite thermoelectric material Fe_xCo_(4-x)Sb_(12) compound by mechanical alloying and spark plasma sintering

利用机械合金化及等离子体烧结法制备了Skutterudite热电材料FexCo4-xSb12(x=0.1,0.3,0.5,0.7)化合物,结果表明,原始粉末高能球磨10 h,不能生成单相Skutterudite化合物。球磨10 h的粉末在640℃下用等离子体放电烧结5 min,当x≤0.5时,可以得到单一相的FexCo4-xSb12化合物,当x>0.5时,杂相(FeCo)Sb2的含量增加,随着Fe含量的增加,烧结样品的晶格常数增大,热导率降低。

The Skutterudite thermoelectric material Fex Co4-x Sb12 （x = 0.1,0. 3,0. 5,0. 7） compound was synthesized by mechanical alloying and spark plasma sintering. It is found that：the single phase Skutterudite compound cannot be obtained after the powder is alloyed for 10 h. the single phase FexCo4-xSb12 compound can be obtained after the alloyed powder is spark plasma sintered for 5 min at 640 ℃ when x〈0.5, while the proportion of （FeCo）Sb2 increases when x〉0.5. With the increase of Fe content, the crystal lattice constant increases and the thermal conductivity decreases.