| 摘要 |
PURPOSE: To lower the resistivity by adding Ag to a material having a specific composition. CONSTITUTION: A material powder having composition Cu (Sn1-x Ax )S [where, A represents one or more than one kind of selected from a group of C, Si and Ge, and 0<=x<=1] is solidified by means of dissolution method or liquid quenching method and then it is crushed to produce a powder having average grain size of 300μm or less. A predetermined quantity of fine powder of Ag is then admixed and crushed. Ag is admixed by 0-20atm%, e.g. 10atm%. Thus produced powder added with Ag is then heated for 10min at 650 deg.C under a pressure of 80kgf/mm<2> , for example, or applied with a pressure of 40kgf/mm<2> to produce a green compact which is then heated at 650 deg.C for 16 hours thus sintering and compacting the powder. With such method, the figure of merit exceeds the conventional value of 0.8×10<-3> /K and the resistivity at room temperature can be lowered below 0.77×10<-5> . |
