高温条件下材料表面电阻率测试方法研究

Researching the Test Method of Surface Resistivity in High Temperature Conditions

摘要:

飞行器在空中飞行时因为各种原因产生的静电放电可能导致其油箱的起火爆炸,静电放电产生的辐射还会对飞行器的通讯和导航系统造成干扰,这就需要飞行器的表面材料具有一定的防静电性能。表面电阻率是衡量材料防静电性能的一个重要参数,飞行器在空中高速运动过程中会因与大气摩擦而产生很高的热量,因此,测量高温条件下材料的表面电阻率尤为重要。对于常温态下材料的表面电阻率的测试有三电极法、两电极法等测试方法。本文通过对比分析三电极法和两电极法,在两电极法的基础上提出了高温条件下表面材料电阻测试方法,并构建了高温条件下材料表面电阻率测试系统。通过对某材料随温度升高的表面电阻率的测试,证明该方法的可行性。

Abstract:

When the aircraft was flying in the air, the electrostatic discharge could be occurred because of various reasons, which may lead the fuel tank fire explosion. And the radiation produced by the electrostatic discharge would cause interference to the aircraft communications and navigation systems. So the aircraft surface material would require a certain antistatic performance. The surface resistivity of materials was an important parameter to measure the antistatic performance. At the same time, in the process of the high speed movement the aircraft in the air could produce high heat due to friction with the atmospheric, so it was especially important to measure the surface resistivity of the material in high temperature condition. The test methods of material surface resistivity in normal temperature were three electrode method and two electrode method. In this paper, through the analysis of three electrode method and two electrode method, test method of material surface resistance in high temperature conditions was put forward on the basis of the two electrode method. The test system of material surface resistivity in the high temperature conditions was constructed. The feasibility of this method was proved by testing the surface resistivity of a material with the elevation of temperature.