SnO2-LiZnVO4 system powers were prepared by co-precipitation. The influence of the amount of LiZnVO4 and relative humidity (RH) on the current-voltage characteristic was studied. The experimental results showed that the current-voltage characteristic strongly depends on the amount of LiZnVO4 and relative humidity. A humidity-sensitive SnO2 with proper humidity sensitivity can be made by doping 10mol％ LiZnVO4, which shows the most evident nonlinear in current-voltage characteristic. Both the current-voltage characteristic and DC charging and discharging currents characteristic showed that the conductance is electronic at low humidity but ionic at high humidity.%采用共沉淀法制备出SnO2-LiZnVO4系湿敏粉体,考察了液相掺杂LiZnVO4和环境的相对湿度(RH)对材料伏安特性的影响.实验结果表明,LiZnVO4的添加量和环境的相对湿度(RH)对材料伏安特性有较大影响.当LiZnVO4添加量为10mol%时,试样伏安特性的非线性最明显,对应的感湿灵敏度也最好.高湿和低湿时的伏安特性和直流充放电特性都表明,该材料在低湿区主要导电载流子是电子;在高湿区,其主要导电载流子是离子.
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