Bu mi n gCh a r a c t e r i s t i c so ft h eMo l y b d e n u m‑Po t a s s i u m Pe r c h l o r a t e‑Ba r iu m Ch r o ma t eDe l a yCo mp o s i t i o n s

研 究 論 文 nl[)Jl[I[]]l]rHl】川l[]l[IM

Bu mi n gCh a r a c t e r i s t i c so ft h eMo l y b d e n u m‑Po t a s s i u m Pe r c h l o r a t e‑Ba r iu m Ch r o ma t eDe l a yCo mp o s i t i o n s

by Long‑Ming Tsai+,Chii‑Homg Liaw',and Yeong‑JgiChen'

The ignitibility,bumi ng rate and itsreprodudbility LorditLerentcompositionsoE Mo‑KCIOrBaCrOldelayelement8areStudied.Iti8ObservedthatthecompoSitionSin certainregionoftriangulardiagram arenotipitible,andforreliableperformancethe contentofKC104inthemixturesshouldnotexceed40%.WithproperselectionofLor･ m血 tion,dehyelementhavingabumingratefrom 0.027to7.5sec/cmcanbereadily adlieved.Theexperimentd resultsalsoshow thatthebt)mingratecanbemademore precisebyyactlum aJnealhgofpelletorbypressinganaccelerationcavityattheinput endofpellet.DataErom heatofreaction.autoipitiontemperatureandX‑raypowder diffractionhavebeencollectedanddiscusミ把d.

1. Jntroduction

Sincedehycompositionphyallimportantrole ittthedevelopmentofexplosivetrains.itsquality and rdiabilityhvestrong effecton theperEor･

正岨 nCe Ofthe wholesystem.Although alarge ntJnberofdelaycompsitionsharebeeneyaluated torcertain p岬 (I)(2),ingeneral,themolyb･

denum dehyswereEouztdto byeawider拍mge ofbtm ingTale(3)(1)(5).Howeyer,theipitibiuty azIdrebbilityofn)olybdentm dehyshavenotyet k nthormghlyinves触 ted.hthis8ttldy,theig‑

nitil)iXty,bumi ng rate aJldreproducll)iHty oEdie Mo‑KCIO4‑hCrO‑ delay compositions am in･

Y軸 ed.h additiontoLorn血 tionstt)dy,two processing techniques m ay yactlum anneahg zLndaccderationcayityareappliedtoimprovethe prew on oE b血 grates.Finally,therTnalaJ)d dlemicaldata arecouected to reyealwi th the yariationofperformaJICe叩1ity.

2, Experimentats 2.1 Raw Materi8tS

(I)MolybdemLEh,99.9% purepowder,Z.Bruton AGreagent.withayerageparticlediameter1.6vm.

(2)hritLm Chromate,99% purepowder.Riedel R∝eiyedonSeptember16,1986

'FourthResearchDepartment,

ChungShallhsdtuteoESdenceandTedhnology, P.0.Boxll,Lung‑TaJl,Taiwan,

(32500)R.0.C.

DeHaemreagent,<63vm aftergh dingaJldsiev･ ing.(3)PotassitJm Perchlorate,99% purepowder, FlukaAG reagent.<44pTnaftersieving.

2.2 PreparationofDelByElement

The maJtuLacturing process ofthe delayele･ Rentsis∝hematicallydescribed in Fig.1.m e delay powder is pr塔Sd in incTtmentS tnder Ilo,000psiintoalou tomgcoppertube,4m L D.and8CEED0.D..A 3.0亡由primercapisusedas ipiter.n eprimerlimeisles thaJl1.5msec(6). A 0.05gm weightofZr/Fe203 (72/28)ipidon m

ixtureispressedontopofthedelaypellet.The hurtling dme oE this ipition mixttLre is about 3.5msec.

2.3 Burnin9R令teMeastJrement

A schematicdrawiJ)gOEexperimentalapparattu

is8hwnimFig.2.ThehLmi ngrateismeasured

dth an Hp‑5315A unjversdcounter.Timing startswhen thehammerhitthefiringpin,aJld stopswhenthephot∝eIIisacttntedbythehsh ofthedehypellet.FifteennmsarefiredEoreadl testedcomposidon.

2.4 V8CUUm AnnealingandAccBlerationC8Vity Twoproc鰯 ingtechniquesareappuedin anat･ temptto improve theperLormaJICeOfthedehy m

ixtures,TIamely.byyactItJm annealingofpeuet orbypressingaAaCCeleradoncavityattheinput end ofthe pellet.A schematicdrawing oEace‑ K6gyaKayaku.Vol.48.No.3.1987 ‑ 169‑

Fig.1 ManufacturingprocessoEdelay

etement. Fig.2 Ap耶 tuSfordehytimemeaBqre･

mel',hJlatLmm.er.2滴ringpin,

3;p也er, 4;dehyelement,5;darkch

aznber,

6;phot

otransislor,7;interhce, 8'.counter.

eleradon cavityconBguradonissbwTIinFig.3 . FortheczLSeOEyacutm a^meah g.thedehym

ix‑ ttm areheated underyacuum at130℃ for ho2.tJr5 ThoS. rmalandChemicalAnalysis 64

PむTbombcalorimeteraJldautoignitiontemper･ aturetesterhvebeenemployedLorthetneasur

ment of heat oE reaction azld atltOignitione･

tempera

tCIO●

Fig.4 BoundaryoEipitiblecompositionsof Mo

lBaCrO.‑KCIOlmixttwes.

0;mayormaynotignite

,

nitible,0;ipitible.

bCrO4

′ ■lT

.〜JlJI)● ノ̲●t

虻lO●

Fig.5 3mi ngtime(see/cm)ofMo‑BaC10 一

‑KCIO4mixtures.

gasevolutiontestisprepared a与th0SeforParr bomb cal○血 eter.Igmition proceedsin a 50cc 也id⊂Ⅵ山 bomb hmished with ttmgstenwire h胡瓜ngdevice.Bdorethet倣t,thebombiscon･ nettedtoa3滋ter伽skwhidhistndernarly yacuum condition.Aherignidon,thegaspr色好ure insidethebaskisme弘urでd,thetotalp svoltLme isthenconvertedto0℃,1atm.

PhilipsPW1050/71X‑raypowderdifEractotnetry isusedfortheanalysisofthereSidtleafter1)tm‑

iJlgOfthed也yelements.Thega紀OuSCOmbtlS donproducth m thebombusedin gasevolu･

Fig.6 CbefEicientsofyariationoEbuming

T8blo1 EffectoEvacuum annealingon(heperformancequalityoLMo‑KC101‑BACrOlmi7Ett)res

ForrrLulations

M〟KClO一rawttio 2. 0/80 30′70+6wt.% +9wt30′70 .% 40′60 50′50+10wt

5

/ 5 0

Resutts BaCrO‑ BaCrO4

BaCrO● B&CrOl BurningtlmCuntreated 4.9 2.3 2.5 3.3 1

.26 0.2 0.47 1.06 0.14 (see/cm)皮

Coefficient

o(fv%)iariantion Vaccum* 2(13..171)(ll.6) (15.3) (21.4) (18.I)(9.8) (17.0ー (15.3) (8.6) 1.07 1.21 1.68 0.86 0.29 0.72 1.27 0.13 0

pall.8)(15.3)(8.8)+EvaCtl renthes8tedunder130℃is Annealing(5.3)(9.2ー (ll.7) r16.0) (12.5)(8.4) (

for64hours. l

t I一〇

qBlJ

TtLJ

q JO]JO

T 一〇 TJ■

>)○)

tLOTOTJJ000hCrOICcnt

oJIttvt･一)Fig.7EEEectofaccelerationcavi tycoArlgtm‑tionontheperformancequalityofMo‑KC10√叫mixttwes.Mo/KCIOI=50/50.‑reguhrtype,････.･withacceleradoJIC a v

ity.afteryacuurrLannealing,theburnhgtimeofthemixttwesarechangedaJldthecoetEicientsofvaria･dona托reduced.Thecomp

osidonslistedinTable

1are血○紀SelectedhmtheregionⅡofFig.5&6.Whereasthedehy00mpositio nsinsider egion皿whidIalreadyhavesatishctoryquality,theyamumanrlealiTIgtreatmentdoesnotgivesign姐･cantchangeorimprovementintheconsistencyoftheirbumingrates.3･3EffectofAccel eratjonCavityConfjgurか

tionFig.7aJldFig.8showtheeffectoEaccelera･doncavityconBBtmtion(7)ondiePerEomancequality.ItisrccongniZablethattheburmigtineoEdehypelletcallbemadenotepredsebythisde与ip.SomeU.S.militaryexplosiyedeviceshareadq)tedthisde si印.Accordingtotheirreport,一一l〇一trtJBt

) 7q亡山

一3.‑OJn召Jd eやAL.〇T一Tt)LT

⁝ ,.8 m

dIttr3'tAOT 一

2030 40 5060 7080 MolybJomlF)ContoJltlvt.I)

Fig,9 HeatofreactionaJldautoignition temperahreofMo‑KCIO4binarymix･ ttlreS.

But.fmm ther溺ultsthatcertainamotmtofMoO 2

andK2MolO13harebeenfoundinthecombustion residue.andthatC)2 gaS has been fourLd in gaseouscombustionproductsasshown inFig.10, itindkateSthatonlyconsideringequation(1日 s notenough tounderstand thedetailcombustion mechniBm,SOme Otherchemicalreactionsmust be taken into accotmt.h otherrespect,the weightbuming yelodty increases monotonically w

ith the mo一ybdenum content (Fig.ll).These results suggestthatthe bumitlg rates a moll ybdenum delaycompositionscannotbecorrelated w

iththeircalorieoutput,butappeartobeaftmc･ 一ionoLthethcrmaIconductivityoEthemixtures (9X)0.

3.5 GasEvo一ution

Fig.10 IdentiLicationoEC12inthe

bumiJlgProducts o/KC10●(30/70)mixttmbyGC/MSand EMo

ysis.Fig.4.Tbtis,forthcGetnOlybdenumconteJlthitherthan95%aJldloweT･thaJ)18%,thedehycoltmnsarenotabletobtmthrough.Weharenodc edthatfortheexcessfuelcomposi

donswho紀mOlybdentu)contentyariedbm80vTt%to95vt%aJtCOnbtutible.Theexphtionisthttheurgepmtag

eofmolybdenumactsaLSagoodheatconducbr,thetJJlbtJTntcolumnpriortothenamefmntispreheatdaLndthereforeitsig･njti

l)ibtyisenhanced.hthiSSystem.the heatoE reacdon reaches a

maximumatappro血tely48wtp e rcentmolybdenumcontent.ThereLoreth

isTedtqualitativelymayagreewith

theLollovnJlg

stoid血metricreladonqestedbyotherin･vestigators(4)4Mo+3KC101‑4MoO 3+3KCl(I

) ta害'一^'●'●一〇^一q) ヽ

Table2 RelativcdiLfractionintensityofthecombustionresidueoEMo/KC10l mixturesfrom X‑raypowderdiEfracliondata.

CombusResltdueion 20=4Mo0.4 KCl Moos Moos Moo℡ K℡28=25.Mo一0)33 Mo′KCt(bywt.)O● 2(0=2Cubi8c).2 (or一hor‑ (hexag

o‑ (mono‑

hombic)

hal) clinic) 28=39.2

28=19.2 20=36.7 70′30 1 0.754 0.

033 0.043 0.156 0.08

50/50 0.33 0

.58 0.036 0.06 0.lot 0.094

48′52 0

.32 0.57 0.029 0.192 0.062 0.043 40′60 0.38 0.86 0.058 0.275 0.029

0.123 20/80 0.70 2.590.1

010.1380.0360.326KC

lO4 b

Fig.12Gasevolution (血1/gm)ofMo‑BaCrq

‑KCIO4mixtwes.KCIOIcontentinthisregion.Fdermore,presenceoffr eechlorineinbumingproductsal s o

givesin･dicationthatviolentoxidationreactioncanbeoc‑mrred.Althoughnoattemptwasmadei

nthi

Fig.13showsatypicalⅩ‑raypwderdifhc･donspectruJnOfthereactionpTductsofMo‑KQOtbinarymixttms.ne00mpnezLtSOLcomhstionresidueareiden戯edasKCl,Md3,MoO2,K2･

M o.013,Mo.eec.T able2liststhe irrehdvediE･hctionintensityofseyeralbinarymixturcs.TheresultshdicatethatthemolybdenllmCaJlTIOtreactcompletdyevenwithyeryhigh○Ⅹidizercon･teJlt(RCIO一).R i地山t的PizItedoutthatthe^一TCU〇一UttJ○コ3

tP

J Td