Abstract
Ultrafine-structure La0.65Sr0.35MnO3 (LSM) powders synthesized by self-propagating combustion method have been used to fabricate sensing electrodes (SEs) for NO2 mixed-potential sensors based on yttria-stabilized zirconia (YSZ). This type of sensor was found to provide better NO2 sensitivity at 500 °C than sensors with LSM powders synthesized by traditional solid-state methods. The response values of the sensor have good linear relationship (sensitivity 36.6 mV/decade and linear fit 0.99) with the logarithm of NO2 concentration varying from 30 to 500 ppm. The influence of sintering temperature (1000, 1100, 1200, and 1300 °C) on sensor response was also examined and was found to have a significant effect on the morphology of LSM-SEs. Moreover, in the presence of NO, CO2, CO, and NO2, the sensor exhibited good NO2 selectivity.
| Original language | English |
|---|---|
| Pages (from-to) | 927-934 |
| Number of pages | 8 |
| Journal | Ionics |
| Volume | 22 |
| Issue number | 6 |
| DOIs | |
| State | Published - 1 Jun 2016 |
Keywords
- LaSrMnO
- Mixed-potential NO sensor
- Self-propagating combustion method
- Yttria-stabilized zirconia
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