LOU Xiang-dong, AN Na, ZHAO Xiao-hua, et al. Preparation of WO3 nonmaterial and its gas sensing properties[J]. 2008, (6): 73-76. DOI: 10.13873/j.1000-97872008.06.006.
Nano powder tungsten oxide is prepared by using a sol-gel process with oxalic acid and benzoic acid as coagulator.Its size
microstructure and morphology are analyzed by XRD and TEM.The effects of roasting temperature
working temperature
gas volume fraction and different coagulator on gas sensing properties are also investigated.The results show that these sensors all have high sensitivity(about 1000) and satisfactory selectivity on NO2.It has lower working temperature(125℃) and quickly response time(1s) when using benzoic acid as coagulator.And it has quickly recovery time(7s) when using oxalic acid as coagulator.Nano WO3 thick film NO2 sensor is a good practical gas sensor.