| 摘要 |
PURPOSE:To obtain a contact material having much superior melt sticking resistance and contg. no harmful element by dispersing prescribed percentages of Li and Sb in Ag in the form of metallic oxides by an internal oxidation method. CONSTITUTION:Li oxide and Sb oxide are formed in Ag by an internal oxidation method and dispersed in the Ag to obtain a contact material. At this time, it is necessary to regulate the Li oxide content to 0.1-3 wt% (expressed in terms of Li) and the Sb oxide content to 0.01-2 wt% (expressed in terms of Sb). It is preferable that at least one kind of transition metal selected among Fe, Ni and Co is further added to the Ag and oxidized by the internal oxidation method so as to make the grains of the matrix of the contact material fine.
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