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Perovskite-type oxide ZnSnO_3 doped with 0.5 wt% Pd was prepared directly by a hydrothermal process,its crystal structure and ceramic microstructure were characterized by XRD and TEM,and the gas sensing properties were tested in static state.It is found that the sensors based on ZnSnO_3 micro-particles have good sensitivity and selectivity to H_2.Its sensitivity can be changed with working temperature;the sensitivity of the sensors to H_2 could arrive 21 times when the working temperature is 332℃.
Perovskite-type oxide ZnSnO_3 doped with 0.5 wt% Pd was prepared directly by a hydrothermal process, its crystal structure and ceramic microstructure were characterized by XRD and TEM, and the gas sensing properties were tested in static state. It is found that the sensors based on ZnSnO_3 micro-particles have good sensitivity and selectivity to H_2.Its sensitivity can be changed with working temperature; the sensitivity of the sensors to H_2 could reach 21 times when the working temperature is 332 ° C.