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硼粉界面改性及其在点火药中的性能研究
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TQ562

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国家自然科学基金(No.21403284)


Study on Interface Modification of Boron Powder and Its Properties in Ignition Powder
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    摘要:

    为提高硼粉和硝酸钾的混合均匀性,增进氧化基团与还原基团的距离,利用界面化学的基本原理,使用季戊四醇等对硼粉进行包覆,添加苯基三氟硼酸钾作为硼与硝酸钾之间的键合剂,通过机械造粒获得改进型点火药。结果表明:使用2%的季戊四醇包覆硼粉(纯度98%),并添加1%苯基三氟硼酸钾键合剂制备的硼/硝酸钾点火药颗粒分布较为均匀,燃烧速度为13.07mm/s,与未改性硼/硝酸钾点火药相比,燃烧速度提升了58.13%;含硼23.7%(季戊四醇0.8%,键合剂0.4%)、硝酸钾70.7%、粘结剂5.6%的配方是一种优良的高能点火药。

    Abstract:

    In order to improve the mixing uniformity of boron powder and potassium nitrate, and shorten the distance between oxidizing group and reducing group, the basic principle of surface interface chemistry was used to coat boron powder with pentaerythritol, potassium phenyltrifluoroborate was added as the bonding agent between boron and potassium nitrate, and the improved ignition powder was obtained by mechanical granulation. The results show that the boron/potassium nitrate(BNP) ignition powder which is prepared by 2% pentaerythritol coating boron powder ( purity 98% ) and 1% potassium phenyltrifluoroborate as the bonding agent, shows relatively uniform particle distribution, and the combustion rate is 13.07mm/s. Compared with the unmodified BNP ignition powder, the combustion rate is increased by 58.13 %. The formula of boron 23.7% ( pentaerythritol 0.8%, bonding agent 0.4% ), potassium nitrate 70.7%, binder 5.6% is an excellent high energy igniton powder.

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  • 在线发布日期: 2022-03-30
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