ABSTRACT

Expandable graphite (EG) can release inserted substances when it is heated and generate a lot of gases during the process. In addition, the main component of EG is graphite, whose emission rate (the ratio of the energy radiated from the surface of an object to that of the black body at the same temperature) is as high as 0.8. This paper aimed to study the influence of EG on the far-infrared radiation properties of foil-type magnesium/Teflon/Viton (MTV) infrared decoy by adding different proportions of EG into the MTV composition. The SC7000 Far-Infrared Thermal Imager and a digital camera were used to observe the burning and radiation properties. The results show that, because of the effect of the intumescent flame retardant of EG and the released inserted layer material in the form of gas, the burning rate and burning temperature as well as the far-infrared radiation brightness of the foil-type MTV infrared decoy drop with the increase of EG. But the far-infrared radiating area and radiation intensity increase at first and then decrease under the same condition, reaching the maximum value when ε (EG) = 10%, with the area and radiation intensity being 4368.38 mm² and 8.28 W sr^-1, respectively.