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钯在空气中或氧气中于400～800℃退火在其表面上将形成一层致密而牢固附着在其表面上的PdO薄膜,该薄膜厚度随温度和保温时间而增加。在1100℃以上温度时,钯不出现氧化膜。钯在氧气中,在高于1000℃保温时,重量减轻。退火初期试样重量的增加是由于非贵金属杂质的内氧化和氧溶于钯中引起的。氧在钯中的溶解度,随温度升高而急剧增高,在1200℃达0.4％(原子)。此时,试样重量的增加取决于
The annealing of palladium in air or oxygen at 400-800C will form a dense and firmly attached PdO film on its surface which will increase in thickness with temperature and holding time. At temperatures above 1100 ° C, palladium does not appear as an oxide film. Palladium in oxygen, at a temperature above 1000 ℃, weight loss. The increase in initial sample weight during annealing is due to the internal oxidation of non-noble metal impurities and the oxygen dissolved in palladium. The solubility of oxygen in palladium increases sharply with increasing temperature, reaching 0.4% (atomic) at 1200 ° C. At this point, the weight of the sample increases