A study of V2O4-PEPC composite based resistance temperature sensors

In this study V₂O₄-PEPC composite based temperature sensors were designed and fabricated by drop-casting the blend of V₂O₄-PEPC microcomposite into thin films between the gap of preliminary deposited electrodes on a glass substrates. The blend was prepared by mixing 10 wt.% vanadium oxide (V₂O₄) micro-powder and 2 wt.% poly-N-epoxypropylcarbazole (PEPC) in 1 ml of benzol. The thickness of the V₂O₄-PEPC films was in the range of 20-40 μm. The gap between silver electrodes was in the range 30-40 μm. The length of silver electrodes was equal to 15 mm. It was found that with increase in temperature from 33 °C to 90 °C the AC resistance of the samples decreases by 10-12 times. The resistance-temperature relationships were simulated.