本篇文章给大家谈谈火药的英文，以及火药的英文单词怎么写对应的知识点，文章可能有点长，但是希望大家可以阅读完，增长自己的知识，最重要的是希望对各位有所帮助，可以解决了您的问题，不要忘了收藏本站喔。
火药的英文简介
Gunpowder,alsocalledblackpowder,isanexplosivemixtureofsulfur,charcoalandpotassiumnitrate,KNO3(alsoknownassaltpetre/saltpeter)thatburnsrapidly,producingvolumesofhotsolidsandgaseswhichcanbeusedasapropellantinfirearmsandasapyrotechniccompositioninfireworks.Thetermgunpowderisalsooftenusedmorebroadlytodescribeanypropellantpowderusedinfirearms.Modernfirearmsdonotusethetraditionalgunpowder(blackpowder)describedinthisarticle,butinsteadusesmokelesspowder.Inthisarticle,thetermsgunpowderandblackpowderareusedinterchangeably.
Gunpowderisclassifiedasalowexplosivebecauseofitsslowdecompositionrateandconsequentlylowbrisance.Lowexplosivesproduceasubsonicdeflagrationwaveratherthanthesupersonicdetonationwaveproducedbybrisants,orhighexplosives.Thegasesproducedbyburninggunpowdergenerateenoughpressuretopropelabullet,butnotenoughtodestroythebarrelofafirearm.Thismakesgunpowderlesssuitableforshatteringrockorfortifications,wherehighexplosivessuchasTNTarepreferred.
Theterm"blackpowder"wascoinedinthelate19thcenturytodistinguishpriorgunpowderformulationsfromthenewsmokelesspowdersandsemi-smokelesspowders.(Semi-smokelesspowdersfeaturedbulkvolumepropertiesthatapproximatedblackpowderintermsofchamberpressurewhenusedinfirearms,buthadsignificantlyreducedamountsofsmokeandcombustionproducts;theyrangedincolorfrombrownishtantoyellowtowhite.Mostofthebulksemi-smokelesspowdersceasedtobemanufacturedinthe1920s.)[1][2][3]
Blackpowderisagranularmixtureof
anitrate—typicallypotassiumnitrate(KNO3)—whichsuppliesoxygenforthereaction;
charcoal,whichprovidesfuelforthereactionintheformofcarbon(C);
sulfur(S),which,whilealsoafuel,lowersthetemperatureofignitionandincreasesthespeedofcombustion.
Potassiumnitrateisthemostimportantingredientintermsofbothbulkandfunctionbecausethecombustionprocessreleasesoxygenfromthepotassiumnitrate,promotingtherapidburningoftheotheringredients.[4]Toreducethelikelihoodofaccidentalignitionbystaticelectricity,thegranulesofmodernblackpowderaretypicallycoatedwithgraphite,whichpreventsthebuild-upofelectrostaticcharge.
Thecurrentstandardcompositionforblackpowdermanufacturedbypyrotechnicianswasadoptedaslongagoas1780.Itis75%potassiumnitrate,15%softwoodcharcoal,and10%sulfur.[5]Theseratioshavevariedoverthecenturiesandbycountry,andcanbealteredsomewhatdependingonthepurposeofthepowder.Forinstance,coarsergradesofblackpowder,unsuitableforuseinfirearmsbutadequateforblastingrockinquarryingoperations,iscalledblastingpowderratherthangunpowder;itisoftenmadewiththecheapersodiumnitratesubstitutedforpotassiumnitrateinproportionsof60%nitrate,20%charcoaland20%sulfur.[citationneeded]
Theburnrateofblackpowdercanbechangedbycorning.Corningfirstcompressesthefineblackpowdermealintoblockswithafixeddensity(1.7g/cm³).Theblocksarethenbrokenupintogranules.Thesegranulesarethensortedbysizetogivethevariousgradesofblackpowder.IntheUnitedStates,standardgradesofblackpowderrunfromthecoarseFggradeusedinlargeboreriflesandsmallcannons,throughFFg(mediumandsmallborearmssuchasmusketsandfusils),FFFg(smallboreriflesandpistols),andFFFFg(extremesmallbore,shortpistolsandmostcommonlyforprimingflintlocks).IntheUnitedKingdom,thegunpowdergrainsarecategorisedbymeshsize:theBSSsievemeshsize,beingthesmallestmeshsizeonwhichnograinswereretained.RecognisedgrainsizesareGunpowder'G7','G20','G40',and'G90'.
用英语介绍火药带翻译
黑火药是我国古代的四大发明之一，距今已有1000多年的历史,黑火药是在适当的外界能量作用下，自身能进行迅速而有规律的燃烧，同时生成大量高温燃气的物质。在军事上主要用作枪弹、炮弹的发射药和火箭的推进剂及其他驱动装置的能源，是弹药的重要组成部分。火药最初主要用于医药，这从其命名的"药"字即可见一斑，后来火药传至欧洲才用于军事.
BlackpowderisoneofthefourgreatinventionsinancientChina,whichhasahistoryofmorethan1000years.Undertheactionofappropriateexternalenergy,blackpowdercanburnrapidlyandregularly,andgeneratealotofhigh-temperaturegasatthesametime.Inmilitary,itismainlyusedastheenergysourceofgun,shellpropellant,rocketpropellantandotherdrivingdevices,anditisanimportantpartofammunition.Gunpowderwasmainlyusedinmedicineatfirst,ascanbeseenfromitsname"medicine".Later,gunpowderwasspreadtoEuropebeforebeingusedinmilitary
火药英语怎么说
火药：gunpowder;powder;例句:它一直津津乐道发明的火药变成了人们日常使用的爆竹。Itsvauntedinventionofgunpowderhadsplutteredintofirecrackers。
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关于火药的英文，火药的英文单词怎么写的介绍到此结束，希望对大家有所帮助。
