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A.S.Darling 发现在真空或氩气气氛中,Pt 与铝、钍和锆等的氧化物产生反应,Pt 与氧化铝分解出来的铝形成固溶体,在1500℃时 Pt 可以溶解2.2%(重量)的铝。W.Bronger 及其合作者指出,在氩气中 Pt 与氧化物的反应可以生成许多金属间化合物。我们熔炼纯 Pt 使用再结晶氧化铝坩埚。熔炼前坩埚用氢氧化钠溶液煮沸一小时,又经二次蒸馏水煮沸成中性,然后用王水煮沸一小时,再用二次蒸馏水煮沸成中性。熔铸是在高频感应炉中用“底漏法”进行。表1列出高纯 Pt 中杂质元素的变化。由表看出高
AS Darling found that Pt reacted with oxides of aluminum, thorium, zirconium and the like in a vacuum or argon atmosphere. Pt formed a solid solution with aluminum decomposed by alumina, and Pt dissolved 2.2% by weight of aluminum at 1500 ° C . W. Bronner and co-workers point out that the reaction of Pt with oxides in argon can generate many intermetallics. We smelted pure Pt using a recrystallized alumina crucible. Crucible before smelting with sodium hydroxide solution to boil for an hour, and then secondary distilled water boiled into a neutral, and then boiled an hour with aqua regia, and then double distilled water boiled into a neutral. Casting is in the high-frequency induction furnace with “bottom leakage method”. Table 1 lists the variation of impurity elements in high purity Pt. High from the table