CNT/高岭土陶瓷薄片温度传感器的实验研究

摘要

To Mix different proportions of carbon nanotube (CNT) and Kaolin evenly and sinter them at 1 500 ℃ fabricate CNT/Kaolin micro porous ceramic material.It is found in experiment that the micro porous ceramic material show the semi-conductive character.When the temperature reaches a threshold,the ceramic material composite would be conductive.The resistivity of ceramic material will decrease with the increasing of temperature.The characteristic of ceramic material shows a new method to manufacture high temperature sensors.In this paper,the CNT/Kaolin micro porous ceramic material is incised into thin plate specimens and installed heat resisting electrodes to manufacture high temperature sensors.It's obvious that the high temperature sensors are competent for high temperature measurement from research results.The new high temperature sensor could be applied in many high temperature fields in the feature,such as aerospace engineering and jet engine.%将不同比例的碳纳米管(CNT)与高岭土均匀混和,在1 500℃高温下烧制成CNT/高岭土多微孔陶瓷材料.实验发现,该多微孔陶瓷材料在高温环境中可表现出半导体特性,即当达到一个温度阈值,多微孔陶瓷材料将成为导体,并且电阻率随温度的继续升高而降低.利用该特性,将材料加工成薄片并安装耐高温的夹持电极,制成高温传感器.研究结果表明,该高温传感器能适应较高温度环境的温度测量,在未来可应用于航空航天、喷气发动机研发等众多领域.