基于气流粉碎法的超细类球形高氯酸铵批量制备及其表征

《基于气流粉碎法的超细类球形高氯酸铵批量制备及其表征》由会员上传分享，免费在线阅读，更多相关内容在应用文档-天天文库。

1、基于气流粉碎法的超细类球形高氯酸铵批量制备及其表征李广超勤wm南京理工大学国家特种超细粉体工程技术研宄中心利用经过改进的气流粉碎机直接制备Y超细类球形高氯酸铵（AP）粒子，通过扫描电子显微镜、激光干法粒度仪、傅里叶红外光谱仪和X射线衍射仪表征了原料AP、超细非球形AP和超细类球形AP的形貌、粒度、样品成分和晶体结构。对同粒度超细类球形AP与非球形AP粒子的热分解性能、机械感度、堆积密度、吸湿性与结块性进行了测试。结果表明，利用气流粉碎法直接制备的超细AP粒子基本为类球形，粒度大约2um,粒度均匀，表面光滑无缺陷，且分散性良好,过程无杂质引入。球形化后AP粒子相比同粒度

2、非球形AP粒子:热稳定性略微提高，撞击感度降低37.6%，摩擦感度降低26.7%;松装堆积密度提高了10.7%，振实密度提高了24%;吸湿与结块性明显改善。关键词：兵器科学与技术;高氯酸铵;气流粉碎;球形化;机械感度;热分解性能;■湿性；基金：国家国防科技工业局基础产品创新计划火炸药科研专项项目（J-KY-2014-1050-2/6）MassPreparationofUltrafineSphere-likeAPParticlesbyJetMillingandTheirCharacterizationLIGuang-chaoLIANGZhen-zongLIANGLiGU

3、OXiao-deNationalSpecialPowderEngineeringResearchCenter，NanjingUniversityofScienceandTechnology;Abstract：Ultrafinesphere-likeammoniumperchlorate(AP)particlesarepreparedbyusinganimprovedjetmill.Themorphologies,particlesizedistributions,samplecompositionsandmolecularstructuresofraw,ultrafi

4、nenon-sphcricalandsphcre-likeAPsarecharacterizedbyusingscanningelectronmicroscope,micronlaserparticlesizeanalyzer,FouriertransforminfraredspectrometerandX-raydiffractomer.Thethermaldecomposition,impactsensitivityandfrictionsensitivity,bulkdensity，hygroscopic!tyandcakingofultrafinesphere

5、-likeandnon-sphcricalAPparticleswithsamesizearcmeasured.TheresultsindicatethattheultrafineAPparticlespreparedbyjetmillingmethodarebasicallysphere-likewithparticlesizeof2um.TheAPparticlesalsohavethecharacteristicsofuniformparticlesize,smoothsurfacewithoutdefect,gooddispersionandhighpurit

6、y.Comparedwithnon-sphericalAPparticleswiththesamesize，thethermalstabilityofsphere-likeAPparticlesisimprovedslightly,andtheirimpactandfrictionsensitivitiesaredecreasedby37.6%and26.7%,respectively;theapparentbulkdensityisin-creasedby10.7%,thetapdensityisincreasedby24%;hygroscopicityandcak

7、ingareeffectivelyimproved.Keyword：ordnancescienceandtechnology;ammoniumperchlorate;jetmillsphericization;mechanicalsensitivity;thermaldecompositionperformance;hygroscopicity;0引言高氯酸铵（AP）作为一种高能氧化剂，广泛应用于固体推进剂、爆破炸药、烟火药等含能材料中［1-2］。研究表明［3-5］，在含AP的复合固体推进剂配方中，超细AP的粒度良接影响了推进剂药浆流变性以及燃烧和力