Abstract
The sinterability of RuO2 has been studied by measuring the isothermal shrinkage of compacts and the surface area change in the temperature range of 800° to 1000°C in oxygen atmosphere. The mechanism of material transport was discussed on the basis of physico-chemical properties obtained from the measurement of decomposition pressure and of weight loss by sublimation.It is elucidated that decomposition pressure of RuO2 goes up to several torr at 1000°C and that sublimation occurs at higher temperature than at 1000°C in a stream of oxygen. It is presumed that the sintering of RuO2 occurs by evaporation-condensation process in oxygen atmosphere.
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