The nonstoichiometry of the iron oxide system is studied by analyzing the weight loss of a sample, measured by using a quartz microbalance, in a temperature range from 0℃ to 1200℃ under oxygen pressures from 102 mmHg to 10-4 mmHg. The Y values of ...
The nonstoichiometry of the iron oxide system is studied by analyzing the weight loss of a sample, measured by using a quartz microbalance, in a temperature range from 0℃ to 1200℃ under oxygen pressures from 102 mmHg to 10-4 mmHg. The Y values of the formula, FeO1+y, are correctly obtained by this means for various conditions of temperature and pressure. The plots of leg Y vs. log Po2 (or log Y=n log Po2) show linearity and n calculated from the slope of the plot is about 1/10 at 1000℃. The effect due to buoyancy and thermomolecular flow on the microbalance has been corrected for by a special design of our own. The electrical conductivity of the iron oxide system in also discussed with respect to the Y values.