Silver alloy wire

The invention discloses an alloy wire. The alloy wire comprises three elements of Ag, Pt and Ge, the content of Pt is 0.1-3 wt%, the content of Ge is 1 ppm to 2 wt%, at least one of the following elements can be added to the alloy wire: Ca, Cu, In, Mg, Si, Ti and Sc, and the total adding amount is 1 ppm to 0.1 wt%. The alloy wire also comprises a surface coating containing Au, Pd or Pt and arranged outside the core wire with the above composition, and the thickness of the surface coating is 0.01-10 [mu] m. The shape of the alloy wire disclosed by the invention can be a round shape or a flat belt shape. 本发明公开一种合金线材。合金线材组成包含Ag-Pt-Ge三种元素，其中Pt含量为0.1至3wt％，Ge含量为1ppm至2wt％，此合金线材可再添加取自下列元素至少其中一种:Ca、Cu、In、Mg、Si、Ti、Sc，其总添加量为1ppm至0.1wt％。此合金线材亦包含在上述组成的核心线材外面再加上含Au、Pd或Pt的表面镀层，此表面镀层的厚度0.01至10μm。本发明所公开的合金线材的形状可为圆形或扁带形。