Determination of a Partial Electronic Conduction Parameter of Solid Eelectrolytes for an Oxygen Sensor by using AC Two Terminals Method

Abstract

A new determination procedure of a partial electronic conduction parameter of a solid electrolyte applied to an oxygen sensor has been developed. It has been confirmed that the partial electronic conduction parameter measured with this procedure is the same that measured with a previous procedure, Swinkels method.
The procedure has following advantages:
1. The procedure can be applied to smaller size of solid electrolyte like 10 mm in long and 2 mm in diameter.
2. The procedure has no restriction concerning the shape of the solid electrolyte.
3. The solid electrolyte is not contaminated during the measurement.
4. Measuring time is shorter than that by the previous method.
The following partial electronic conduction parameters are observed:
ZrO₂-7 mol%MgO: log P_e'=19.1-70×10³/T ZrO₂-8 mol%MgO: log P_e'=19.8-70×10³/T
ZrO₂-9 mol%MgO: log P_e'=23.9-70×10³/T ZrO₂-15 mol%MgO: log P_e'=25.7-70×10³/T
ZrO₂-11 mol%CaO: log P_e'=37.8-91×10³/T ZrO₂-15 mol%CaO: log P_e'=37.8-91×10³/T
ZrO₂-6 mol%Y₂O₃: log P_e'=20.1-63×10³/T ZrO₂-8 mol%Y₂O₃: log P_e'=20.1-63×10³/T