Oxidation in Flow-Reaction Systems
Many high-temperature metals form volatile oxides when volatilized above 1200 C. When that occurs, rapid oxidation is observed. Special dynamic vacuum-microbalance reaction systems are used to study the several chemical and physical mechanisms involved. To illustrate the method, the oxidation of rhenium and molybdenum is presented. Rates of oxidation of 1018 atoms of Re or Mo were observed at 1100 and 1400 C, respectively. Comparison was made to predictions from the activated-state theory of surface reactions.
KeywordsVolatile Oxide Observe Reaction Rate Area aSurface Vacuum Microbalance Enthalpy Barrier
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