Abstract
The humidity-sensitive TiO 2-Cu 2O-Na 2O thick films were prepared by screen printing on alumina substrates and subsequent firing. Pastes for screen printing were obtained by adding an organic vehicle and binder to TiO 2-Cu 2O-Na 2CO 3 powders. The microstructure of the films changed with the content of the sodium oxide and the firing temperatures. When the resistance characteristics of the sensors obtained from TiO 2-Cu 2O-Na 2O, 10-2-1 were measured, the resistance changed linearly in its semi-logarithmic graph. The resistance varied from 10 7 to 10 4 Ω between 20 and 95%RH, which was required for a common humidity sensor. Temperature dependence, frequency dependence and response time were also measured and estimated.
Published Version
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