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研究了碳纳米管粉末在3～5μm、8～13μm波段内的平均红外发射率,分别考察了单壁碳纳米管(L-SWNT-1*)、双壁碳纳米管(L-DWNTs)及多壁碳纳米管(L-MWNT-10)在上述2个波段内发射率随温度的变化。研究结果表明,随着温度的升高,实验所用碳纳米管粉末在上述2个波段内的平均红外发射率随之降低,尤其是在波段3～5μm内,温度为190℃时碳纳米管的平均红外发射率与70℃相比降低了35%左右。同时,对环氧树脂基碳纳米管涂层的红外发射率随温度的变化也进行了考察。结果表明,随温度的升高,涂层的红外发射率也随之降低。说明碳纳米管具有一定的高温红外隐身特性,且碳纳米管在中波3～5μm比在长波8～13μm具有更明显的负温度系数效应。
The average infrared emissivity of carbon nanotube powder in the range of 3-5 μm and 8-13 μm was studied. The effects of single-walled carbon nanotubes (L-SWNT-1 *), double-walled carbon nanotubes (L-DWNTs) Evaporation rate of multiwalled carbon nanotubes (L-MWNT-10) varies with temperature in the above two bands. The results show that with the increase of temperature, the average infrared emissivity of the carbon nanotube powder used in the experiment decreases in the above two bands, especially in the band of 3-5 μm, at a temperature of 190 ° C. The average infrared emissivity is about 35% lower than at 70 ° C. At the same time, the infrared emissivity of the epoxy-based carbon nanotube coating was also investigated with the change of temperature. The results show that with increasing temperature, the infrared emissivity of the coating also decreases. It shows that carbon nanotubes have a certain high-temperature infrared stealth characteristics, and the carbon nanotubes have a more pronounced negative temperature coefficient effect in the medium wave 3 ~ 5μm than the long wave 8 ~ 13μm.