硼/超细硝酸钾点火药配方设计及工艺

为研究新型安全点火药配方及制备工艺,基于典型的硼/硝酸钾(B/KN O3)点火药配方,选用超细硝酸钾对其进行改性,采用手工混药法进行造粒,同时添加酚醛树脂或氟橡胶作为粘结剂,制备出B/KN O3造型粉,并测试了其火焰感度和静电感度。结果表明:随硝酸钾质量含量的减少,火焰感度升高,尤其外加2.5%酚醛树脂粘结剂的B/KN O3(50/50)火焰感度最高;而静电感度则降低,当B/KN O3配比一定时,添加相同的粘结剂氟橡胶比添加酚醛树脂更钝感。

Processing Technology and Formulation Design of Ignition Composition of Boron/Ultra-fine Potassium Nitrate

In order to study the formula and preparation of a neotype security ignition compositions, based on the typical formula of Boron/Potassium Nitrate (B/KNO3), and the ultra-fine KNO3 was used to improving its ignition performance, and then the B/KNO3 molding powder was obtained by manual mixed process while adding phenol formaldehyde resin or fluorine rubber as the binder. The test of flame sensitivity indicates that the sensitivity will rise with the increase of KNO3 mass content, and especially the B/KNO3 (50/50) adding 2.5wt.% phenol formaldehyde resin as additive binder will be more sensitive, but the electrostatic sensitivity test shows that sensitivity will fall with the decrease of KNO3 mass content. When the mass ratio of B/KNO3 keeps constantly, the ignition powder adding fluorine rubber binder is less sensitive than that of phenol formaldehyde resin, B/ultra-fine KNO3(50/50) is a neotype ignition powder.