Question

You are assigned a task of setting up experimental apparatus for a heat treatment experiment using a tube furnace. The heat treatment requires a maximum temperature of 1500 °C and the heat treatment will last for about 5 hours in room atmosphere. The temperature accuracy required for the sample and homogeneity of the temperature throughout the sample of 10mmx20mmx100mm dimension is ±5 °C. you will need to use DAQ and Labview to automate the temperature control and recording. The temperature measurement itself should have a precision of ±0.5 °C.

d.   You need to reduce the oxygen partial pressure of the heat treatment atmosphere by purging argon gas from an argon gas cylinder through the tube furnace. You used a stabilised zerconia (ZrO2) oxygen concentration cell for oxygen partial presure measurement. To verify a oxygen content of lower than 5x10-4 atm, you need to see a EMF (E) generated by the cell reaching what value? The oxygen concentration cell was kept at 750 °C. (10 marks)

Answer 1

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