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Platinum losses during high temperature oxidation

1981; Elsevier BV; Volume: 78; Issue: 2 Linguagem: Inglês

10.1016/0022-5088(81)90141-7

1878-2728

Hermann Jehn,

High-Temperature Coating Behaviors

Platinum reacts with oxygen at high temperatures to form volatile oxides the evaporation of which considerably increases the platinum losses in oxygen-containing atmospheres compared with high vacuum conditions. The metal losses of polycrystalline platinum discs were determined in the pressure range 10−1–10−5 Pa and at high temperatures (1300–1600°C) using a magnetic suspension balance. Marked temperature and pressure dependences were observed. The oxidation mechanism is discussed and the oxidation rates reported in the literature are reviewed. The normal spectral emissivity (λ = 0.645 μm) was also determined.