Study on the Influence Pattern of MgB2 on the Combustion Radiation Characteristics of MTV Decoy
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摘要:针对镁/聚四氟乙烯/氟橡胶（MTV）红外诱饵剂在远红外波段辐射强度偏低的问题，将二硼化镁（MgB2）作为高能燃料组分引入MTV体系中，制备了不同MgB2添加量（0%～50%）的MTV药柱，采用光谱辐射计与远红外热像仪对其燃烧温度、辐射面积、燃速及1.3～14.0 μm波段辐射强度进行了测试。结果表明：引入MgB2后，药剂的燃烧温度、辐射面积及燃速显著提升，最大值分别达到1 546 °C、176 cm2和1.09 mm·s-1；随着MgB2添加量增加，1.3～3.0 μm波段辐射强度从178 W·sr-1降至130 W·sr-1，而8.0～14.0 μm波段辐射强度从3.90 W·sr-1升至7.11 W·sr-1，表明MgB2可有效抑制近红外辐射并增强远红外辐射。光谱辐射比E1.3～3.0 μm/E3.0～5.0 μm从3.017优化至2.241，E8.0～14.0 μm/E3.0～5.0 μm从0.066优化至0.123。MgB2改性MTV药剂具有更优的燃烧与辐射性能。
Abstract:To address the issue of low radiation intensity in the far-infrared band for magnesium/polytetrafluoroethylene/ vulcanized rubber (MTV) infrared decoy agents, magnesium diboride (MgB2) was introduced as a high-energy fuel component into the MTV system. MTV pellets with varying MgB2 addition amounts (0%～50%) were prepared, and their combustion temperature, radiation area, burn rate, and radiation intensity in the 1.3～14.0 μm band were measured using a spectral radiometer and a far-infrared thermal imager. The results showed that after introducing MgB2, the combustion temperature, radiation area, and burn rate of the propellant significantly increased, reaching maximum values of 1 546 °C, 176 cm2, and 1.09 mm·s-1, respectively. As the MgB2 addition amount increased, the radiation intensity in the 1.3～3.0 μm band decreased from 178 W·sr-1 to 130 W·sr-1, while that in the 8.0～14.0 μm band increased from 3.90 W·sr-1 to 7.11 W·sr-1, indicating that MgB2 effectively suppresses near-infrared radiation and enhances far-infrared radiation. The spectral radiation ratios E1.3～3.0 μm/E3.0～5.0 μm were optimized from 3.017 to 2.241, and E8.0～14.0 μm/E3.0～5.0 μm were optimized from 0.066 to 0.123. The MgB2-modified MTV propellant exhibited superior combustion and radiation performance.
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