PAN基碳纤维布电热装置电热性能的研究

STUDY ON THE ELECTRIC PROPERTIES OF PAN-BASED CARBON FIBER ELECTRIC HEATING DEVICE

碳纤维是一材多用的功能和结构材料,采用湿法成型制成的聚丙烯腈(PAN)基碳纤维具有发热均匀、热量稳定的优点。为了研究PAN基碳纤维布的电热性能,设计制作以PAN基碳纤维布为发热体的电热装置,并对该装置的阻温特性、电压-温度、通电时长-温度等进行实验,结果表明:(1)装置在通电加热后,电阻变化率随温度的升高略有升高,但是变化非常小;(2)装置在低压下具有良好的热稳定性,表面温度与电压、输入功率基本成正比;(3)装置温升速度快,温度波动小于0. 5℃,热稳定性好。证明PAN基碳纤维布能够替代电阻丝作为发热材料,为PAN基碳纤维布作为电热装置发热材料的推广和使用提供了实验依据。

Carbon fiber is a versatile functional and structural material.The PAN-based carbon fiber produced by wet process has the advantages of uniform heat and stable heat.In order to study the electric properties of PAN based carbon fiber cloth,an electrical heating device is designed and made with PAN-based carbon fiber cloth as the heating material.We test the resistance-temperature characteristic,voltage-temperature relation and time-temperature relation.The result shows that when the device is electrified,the rate of resistance change increases slightly with the increase of temperature,but the change is very small.The device has good thermal stability under low pressure,and the surface temperature is proportional to the voltage and input power.The device temperature rises faster,which reaches thermal equilibrium after 5 minutes of electricity,the temperature fluctuation is less than 0.5℃.It is proved that PAN-based carbon fiber cloth can replace resistance wire as heating material.It provides experimental evidence for the popularization and use of PAN-based carbon fiber as heating material for electric heating device.