为了探究用硼系延期药制作高秒量雷管的可行性，采用了不同管体材料和不同壁厚的同种材料制作低燃速硼系延期体。研究结果表明：由于预热效应的存在，延期药的燃烧速度随着管体材料导热系数的增加而变快，从热绝缘材料到导热材料，延期药的燃烧速度跳跃式增加；当延期体管体为同种导热材料时，在热散失和热传导的双重作用下，延期药燃速随着管体壁厚的增加而降低，但是相对精度却不是随壁厚的增加发生一致性变化，延期体精度随着壁厚的增加先升高然后降低，在壁厚为4 mm时的延期精度最高。%[ ABSTRACT] Several pipe materials having various wall thickness were used in the fabrication of boron type delay char-ges with low burning rate to explore the feasibility of producing high second delay detonator. Experiment results show that, due to the existence of pre-heating, the burning rate of the delay compositions increased with the increased thermal conduc-tivity of the package, especially an abrupt increase when materials nature was changed from heat insulator to heat conduc-tor. For the same type of heat conducting pipe material, the burning rate of the delay compositions will decrease with in-creased wall thickness due to the effect of heat dissipation and heat conduction. The accuracy of delay composition was ob-served as increasing with the increased wall thickness to the apex, which corresponds to a wall thickness of 4 mm, and then followed by decreasing.
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