模压可燃药筒的孔隙结构分析  

Analysis of Pore Structure for Molded Combustible Cartridge Case

作　　者：邹伟伟[1] 肖乐勤[1] 菅晓霞[1] 周伟良[1] 

机构地区：[1]南京理工大学化工学院,江苏南京210094

出　　处：《火炸药学报》2011年第3期65-68,82,共5页Chinese Journal of Explosives & Propellants

摘　　要：采用5种测试仪测定了两种可燃药筒的真密度和表观密度,用氮气吸附法和压汞法对两种可燃药筒的孔隙结构进行了表征,研究了药筒的孔隙率、比表面积、孔容和孔径分布。结果表明,振实密度法和气体置换法可用于测定可燃药筒的表观密度和真密度,药筒的孔以狭缝形和楔形孔为主,孔径分布较宽。压汞法可用于可燃药筒的孔结构分析,测得可燃药筒的孔隙率大于25%,孔径为0.2~60μm的孔容积占总孔容的67%以上;药筒孔隙的总比表面积约为20 m2/g,小于0.1μm的孔的比表面积占总比表面积的95%以上。Absolute density and apparent density of two combustible cartridge cases were studied by different instruments,and porosity,specific surface area,pore volume and pore size distribution of two combustible cartridge cases were analyzed by using nitrogen gas adsorption method and mercury intrusion porosimetry.Results showed that tap density method and gap displacement method were better suited to measure absolute density and apparent density of combustible cartridge cases respectively.Pores of combustible cartridge case were mainly slit-shaped and wedge-shaped,and pore size distribution was scattered.Compared with nitrogen gas adsorption method,mercury intrusion porosimetry was more suitable for determining pore structure of combustible cartridge case.The porosity of combustible cartridge case was over 25%.The volume fraction of macropores with diameters of 0.2-60 μm was above 67%.The specific surface area of combustible cartridge case was about 20 m2·g-1,and the specific surface area of pores less than 0.1 μm was above 95%.

关 键 词：材料科学 可燃药筒 真密度 表观密度 孔隙结构 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] TQ562[化学工程—炸药化工]