| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for finely dispersing a magnesium-silicon compound thermoelectric material, ceramics hollow particles, ceramics particles, etc., in an iron-silicon compound thermoelectric material. SOLUTION: A powdery mixture which comprises iron powder, silicon powder, cobalt powder and their inevitable metallic elements, in which atomic ratio of silicon to iron is 1:2 and 2 to 16% in atomic ratio of iron atoms are replaced with cobalt atoms and a powdery mixture in which atomic ratio of silicon to magnesium is 2:1 are simultaneously compounded at 5:1 to 1:1 by weight ratio and are subjected to a mechanical alloying treatment. Further the ceramics hollow particles are added to an obtained powder so as to be 20:1 to 1:1 by a weight ratio and then the mixture is subjected to the mechanical alloying treatment to produce a powdery mixture in which clear generation of ferrous-silicon compounds is suppressed. The obtained powder is sintered to obtain a sintered compact in which iron disilicide and magnesium silicide are alloyed at nanometer level or a sintered compact in which ceramics hollow particles are uniformly dispersed.</p> |
