| 摘要 |
PURPOSE:To obtain shielding materials whose electromagnetic shielding characteristics are excellent, and whose characteristic deterioration due to strain and characteristic changes with the passage of time are small, by constitut ing the materials specifically and making them contain minute crystal particles at a rate of at least 50% of the formation. CONSTITUTION:Materials of this invention have constitution expressed by equa tion I. At least 50% of the formation is minute crystal particles, and the materials comprise of alloys whose average crystal particle diameter is less than 1000Angstrom . In equation I, M, M, M, or X is at least one kind of element chosen from Co and/or Ni; Nb, W, etc.; V, Cr, etc.; or C, Ge, etc., respectively. Symbols (a), (x-z), and (alpha-gamma) satisfy 0<=a<0.3, 0.1<=x<=3, 0<=y<=25, 3<=z<=17, 10<=y+z<=30, 0.1<=alpha<=10, 0<=beta<=10, and 0<=gamma<=10. As the reciprocal action param eter between Cu and Fe is positive, and their soluble degrees are low, they tend to separate and many easily crystallizable domains are produced partially. Minute crystal particles are produced having the domains as nucleuses. This makes possible obtaining electromagnetic shielding materials whose electromag netic shielding characteristics are excellent, and whose characteristic deteriora tion due to strain and characteristic changes with the passage of time are small. |
