Abstract
The gas-sensing characteristics of bismuth ferrites with the compositions BiFeO 3, Bi 4Fe 2O 9, Bi 2Fe 4O 9 as new materials for semiconductor gas sensors are presented. Ceramic samples of composition BiFeO 3 show a high sensitivity to ethanol and acetone vapour. The response and recovery times, long-term stability and reproducibility of gas-sensitive elements, as well as the effect of humidity are studied. A comparison with the characteristics of gas-sensitive elements based on other materials shows the possibility of using bismuth ferrites as sensitive materials for semiconductor gas sensors.
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