| 摘要 |
A precious metal alloy for dental restorations which develops a light oxide upon firing, on a percentage weight basis at makeup, consists of 60-95 precious metal(s) selected from the group consisting of 60-855 palladium, 0-10 gold, 0-10 platinum, 0-12 silver, and mixtures thereof; 1-15 tin; 2-7 zinc; 0.005-0.2 boron; 0-2 gallium; 0-2 cobalt; 0-15 indium; 0-0.2 of a deoxidant selected from the group consisting of silicon, germanium, magnesium, aluminum, lithium, tantalum and mixtures thereof; and 0-1.0 of a grain refiner selected from the group consisting of ruthenium, iridium, rhenium, and mixtures thereof. The alloy has a liquidus temperature of not more than 1400 DEG C., and the alloy has a tensile yield strength of at least 250 Mpa and an elongation of at least 2 percent. Restorations having a porcelain coating fired on castings of the alloy evidence a light oxide color.
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