Hydrogen Sensing Characteristics of ZnSnO3 Micro-particles Doped with Noble Metal Pd

摘要

Perovskite-type oxide ZnSnO_3 doped with 0.5wt. % 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 Hb. Its sensitivity can be. changed with working temperature; the sensitivity of the sensors to Kb arrives at 21 times when the working voltage is 5.0 V.