Research Article
Effects of Niobium-Loading on Sulfur Dioxide Gas-Sensing Characteristics of Hydrothermally Prepared Tungsten Oxide Thick Film
Figure 5
Change in resistance of unloaded and 0.25–1.0 wt% Nb-loaded WO3 gas sensors to SO2 pulses with concentration ranging from 20 to 500 ppm at 250°C.