Natural SciencesMaterials EngineeringMaterials ScienceElectrochemistryMaterials ChemistrySensorsElectrochemical SensorsElectrode MaterialsGas SensorsPorous CeramicsPorous MaterialsSensor MaterialsCrystal Surface MorphologyField EmissionNanostructured Gas SensorsOxide Solid ElectrolytesPorous Electrode MaterialsRepeatabilitySolid Electrolyte CharacterizationZirconia
High performance mixed potential type NO2 sensors using porous yttria-stabilized zirconia (YSZ) layers doped with different concentration graphite as solid electrolyte and LaFeO3 as sensing electrode were fabricated and characterized. LaFeO3 was prepared by a typical citrate sol–gel method and characterized using XRD. The surface morphology and porosity of porous YSZ layers were characterized by field emission scanning electron microscope (FESEM). The sensor doped with 3 wt% graphite shows the highest response (−76.4 mV to 80 ppm NO2) and the response is linearly dependent on the logarithm of NO2 concentration in the range of 10–200 ppm. The sensor measurement results also present good repeatability and cross-sensitivity.
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Solid State Gas Sensor Research in Germany – a Status Report
Kathy Sahner, Maximilian Fleischer, U. Guth et al. · Sensors · 2009 · 147 citations · Full text
Natural Sciences, Materials Engineering, Materials Science +17