CAJ | 학술논문

采用多种表征手段研究了一种降感奥克托今(D-HMX)的晶体特性、热性能及感度性能.采用折光匹配光学显微镜(OPM)、扫描电镜(SEM)、激光粒度仪、高效液相色谱、密度梯度法和X射线衍射(XRD)表征了D-HMX的颗粒形态、粒度、纯度、颗粒密度及晶型结构; 采用差热扫描(DSC)、真空安定性实验(VST)研究了其热性能,通过机械撞击感度实验、摩擦感度实验和隔板实验研究其感度性能.结果表明,D-HMX是一类具有较高晶体品质的β-HMX单质炸药.与普通HMX(C-HMX)相比,D-HMX具有较好的颗粒形态和较少的晶体缺陷,热性能和感度性能明显改善.D-HMX的颗粒形状接近球形,为规则的几何多面体,无孪晶聚晶现象,晶面光洁,颗粒均匀,粒度分布窄,颗粒透明,内部无明显杂质和包藏物,纯度为(99.6±0.1)%,颗粒平均密度大于1.9016 g·cm-3,接近晶体最大理论密度1.903 g·cm-3且密度分散性小.DSC实验结果表明,D-HMX的β→δ晶相转变温度比C-HMX 提高6 ℃,VST放气量明显小于C-HMX.隔板实验结果表明,基于D-HMX的浇铸和压装PBXs的铝隔板厚度比C-HMX降低10%～23%.另外,D-HMX的机械撞击感度也比C-HMX下降,特别是D-HMX细颗粒(FD-HMX),其特性落高为72.2 cm,爆炸概率24%,比C-HMX细颗粒(FC-HMX)的16.8 cm和88%表现出更强的抗撞击性.
채용다충표정수단연구료일충강감오극탁금(D-HMX)적정체특성、열성능급감도성능.채용절광필배광학현미경(OPM)、소묘전경(SEM)、격광립도의、고효액상색보、밀도제도법화X사선연사(XRD)표정료D-HMX적과립형태、립도、순도、과립밀도급정형결구; 채용차열소묘(DSC)、진공안정성실험(VST)연구료기열성능,통과궤계당격감도실험、마찰감도실험화격판실험연구기감도성능.결과표명,D-HMX시일류구유교고정체품질적β-HMX단질작약.여보통HMX(C-HMX)상비,D-HMX구유교호적과립형태화교소적정체결함,열성능화감도성능명현개선.D-HMX적과립형상접근구형,위규칙적궤하다면체,무련정취정현상,정면광길,과립균균,립도분포착,과립투명,내부무명현잡질화포장물,순도위(99.6±0.1)%,과립평균밀도대우1.9016 g·cm-3,접근정체최대이론밀도1.903 g·cm-3차밀도분산성소.DSC실험결과표명,D-HMX적β→δ정상전변온도비C-HMX 제고6 ℃,VST방기량명현소우C-HMX.격판실험결과표명,기우D-HMX적요주화압장PBXs적려격판후도비C-HMX강저10%～23%.령외,D-HMX적궤계당격감도야비C-HMX하강,특별시D-HMX세과립(FD-HMX),기특성락고위72.2 cm,폭작개솔24%,비C-HMX세과립(FC-HMX)적16.8 cm화88%표현출경강적항당격성.
A kind of desensitized octogen (D-HMX) was characterized with various analysis methods, including Optical Microscopy with Matching Refractive Index(OPM), Scanning Electron Microscopy(SEM), Laser Particle Sizer, High Performance Liquid Chromatography (HPLC), density gradient technique and X-ray Diffraction(XRD). The thermal properties of D-HMX were investigated by Differential Scanning Calorimetry (DSC) and Vacuum Thermal Stability test(VST). The sensitivities of D-HMX against friction, impact and shock were studied. Compared with conventional octogen (C-HMX), D-HMX has better morphology, lesser crystal defects, better thermal properties and takes great effect on reducing shock sensitivity in both cast and pressed PBX formulations. Which are incarnated from the following aspects. First, the D-HMX has no twinned crystals or congeries, which shape is regular polyhedron and nearly spheric. Second, there are no inclusions in D-HMX crystals, the purity of D-HMX is (99.6±0.1)% and the mean particle density is great 1.9016 g·cm-3. Third, the results of DSC and VST show that the β→δ phase transition of D-HMX is shifted to high temperatures about 6 ℃ and that the amount of gas evolution of D-HMX is obviously less after being heated for 48 h at 120 ℃ compared with C-HMX. Fourth, the results of shock sensitivities demonstrate that the aluminium gap thicknesses of cast and pressed PBXs based on D-HMX are lesser 10%～23% than that of PBXs based on C-HMX. Additional, the impact sensitivity of D-HMX appears lower sensitivity than C-HMX. Especially for the fine grain D-HMX(FD-HMX), the drop-height of 72.2 cm and initiation probabilities of 24% indicate there are significantly higher resistance to impact than the fine grain C-HMX(FC-HMX) of 16.8 cm and 88%.