敏感元件不仅在工业设备中得到了应用,而且在消费品中也得到了应用。在实际应用中,敏感元件所需要的条件越来越严苛,而且必须进一步降低成本。在本文中主要讨论陶瓷气敏元件和湿敏元件。一、气敏元件气敏元件是直接以电信号输出的敏感元件,可粗分为半导体型和接触燃烧型,很适于探测气体漏泄。半导体型敏感元件按下列方式进行工作。由加热器加热到高温的半导体(通常为 SnO_2、Fe_2O_3和ZnO 等 n 型氧化物半导体)与可燃气体接触时,其 Sensitive components are used not only in industrial plants but also in consumer products. In practical applications, the conditions required for sensitive components are becoming more and more stringent, and the costs must be further reduced. In this paper, the main discussion of ceramic gas sensors and humidity sensors. First, the gas sensor Gas sensor is a direct electrical signal output of sensitive components can be roughly divided into semiconductor-type and contact combustion, it is suitable for detecting gas leaks. The semiconductor type sensor operates as follows. When a semiconductor (typically an n-type oxide semiconductor such as SnO 2, Fe 2 O 3, or ZnO) heated by a heater comes into contact with a combustible gas, its