Kwimizi-mveliso yokutya, iifektri zezixhobo zonyango, kunye nezibonelelo ezithile zoshishino, imitha ye-gamma okanye imiqadi ye-electron isetyenziselwa ukuvala inzala. Ukuba kufuneka usebenzise Iteyiphu ye-PTFE yobushushu obuphezulu kwezi meko-bume - okanye okubi ngakumbi, kwiplanti yamandla enyukliya - kufuneka uqonde imida yayo yokumelana nemitha.
Impendulo emfutshane: I-PTFE isengozini kakhulu kwimitha ye-ionizing. Isebenza kakuhle kwizicelo zedosi ephantsi (njengokuvala inzala ekutyeni) kodwa iyasilela ngokwentlekele kwiidosi eziphezulu.
I-Aokai PTFE ivavanye iiteyiphu ze-PTFE phantsi kweemeko ezahlukeneyo zemitha. Eli nqaku lichaza iindlela zokuthotywa, imida yedosi, kwaye apho ungaze usebenzise i-PTFE tape.
INyaniso enguNdoqo – i-PTFE inoNxamnye neRadiation eManteneyo
Icandelo eliphambili le- PTFE iteyiphu yobushushu obuphezulu yi-polytetrafluoroethylene (PTFE). Ngokungafaniyo nozinzo olugqwesileyo lwe-thermal kunye neekhemikhali, i-PTFE isengozini kakhulu kwimitha ye-ionizing efana nemitha ye-gamma kunye nemitha ye-electron.
Ngoba? Ukusasazeka kwemitha kophula ibhondi ye-carbon-fluorine (CF) kunye nomqolo wepolymer, nto leyo ebangela ukukruquka kwetsheyini yeemolekyuli. Izinto eziphathekayo ziba brittle kwaye zilahlekelwa amandla omatshini.
Intsingiselo esebenzayo: iteyiphu ye-PTFE ilungele kuphela iindawo ezisingqongileyo ezinamathamo emitha aphantsi. ngokubanzi Ayivumelekanga kwimizeko yemitha ephezulu efana neecore reactor zenyukliya okanye iilophu eziphambili.
Xa evezwe kwimitha, PTFE amatsheyina molekyuli iqhawuka, okubangela ukwehla kabukhali kwiipropati mechanical. Utshintsho oluthile luboniswe ngezantsi:
Ithamo lemitha |
Okusingqongileyo |
Isiphumo kwi-PTFE |
1 kGy (0.1 Mrad) |
Umoya |
Amandla okuqina ehla ukuya kwi ~25% yexabiso lokuqala |
10 kGy |
Umoya |
I-embrittlement ephawulekayo; ukuqala kokuqhekeka komphezulu |
100 kGy |
Umoya |
Ukuthotywa okukhulu; iteyiphu inokudilika xa iphathwa |
1 MGy (1000 kGy) |
Umoya |
Ilahleko yobude ukuya kuma- 87% ; ukwehla kwamandla e-tensile 54% |
Idatha eyongezelelweyo:
Kwi -atmosfera engasebenziyo (i-vacuum, i-nitrogen, okanye i-deuterium), ukuthotywa komgangatho kuyacotha kodwa akuphepheki.
I-Thermal-radiation coupling (ubushushu obuphezulu + imitha) ikhawulezisa ukuguga ngakumbi.
I-Aokai PTFE icebisa abathengi ukuba iteyiphu yethu esemgangathweni ye-PTFE ifanelekile ekutyeni inzala (≤10 kGy) kunye nokuvala inzala kwisixhobo sonyango somjikelo omnye (≤50 kGy). Kwiidosi ezongezelekayo ezingaphezu kwe-100 kGy okanye imijikelo yokuvala iintsholongwane ezininzi, sincoma ukutshintshela kwiteyiphu ye-polyimide.
Imiba yokuSingqongileyo Ekhawulezisa ukuwohloka komgangatho
Umba |
Isiphumo kwi-PTFE Phantsi kweRadiation |
Iatmosfere (ioksijini) |
Ioksijini ikhawulezisa ukuwohloka-i-radicals yasimahla isabela nge-O₂, ibangela ukukrazula kwekhonkco |
Imoya engasebenziyo (ivacuum/N₂) |
Ukuthotywa kwexabiso kuncitshisiwe kodwa kusebalulekile – akunakuthintelwa ngokupheleleyo |
Ubushushu obuphezulu |
I-Thermal-radiation coupling effect - ukuguga kukhawuleza ngokukhawuleza |
Ukufuma |
Ukufuma kunokukhuthaza i-hydrolysis yomphezulu, i-embrittlement ibe mandundu |
Isikhokelo esisebenzayo: Ukuba kufuneka usebenzise iteyiphu ye-PTFE kwindawo enedosi ephantsi yemitha enomoya okhoyo, yibuyisele rhoqo. Kwi-vacuum okanye igesi engasebenziyo, ubomi bandiswa kodwa abunasiphelo.
Iimeko eziSebenzayo kunye nezilumkiso zoMngcipheko
Usetyenziso oluCetyisiweyo lweDosi ePhantsi yeRadiation (≤50 kGy)
Isicelo |
Idosi eqhelekileyo |
PTFE Tape Ukufaneleka |
Ukuvalwa kokutya |
1-10 kGy |
✅ Kuhle - akukho kuthotywa okubonakalayo |
Ukubulala iintsholongwane kumphezulu wesixhobo sonyango |
15-50 kGy (umjikelo omnye) |
✅ Yamkelekile -inokuba brittle emva kwemijikelo emininzi |
Izixhobo zamachiza |
10-25 kGy |
✅ Yamkelekile - buyisela emva komjikelo ngamnye kusetyenziso olubalulekileyo |
Iindawo ezingengombindi wezityalo zenyukliya (umzekelo, ukulungisa umbhobho wokugquma) |
Idosi ephantsi, i-PTFE elungisiweyo iyafuneka |
⚠️ Kuphela ukuba ilungiswe ngokukodwa -i-PTFE eqhelekileyo ayikhuthazwa |
Iimeko zoMtha oPhezulu oPhephayo (>100 kGy)
Isicelo |
Idosi eyongezelekayo |
Kutheni i-PTFE Isilela |
Ngcono Enye indlela |
Undoqo wereactor yeNyukliya |
>1 MGy |
Izinto eziphathekayo ziyawohloka |
Polyimide (Kapton) okanye PEEK |
Amacandelo angundoqo welophu |
100 kGy – 1 MGy |
Ukuxhatshazwa okunzima |
Polyimide / PEEK |
Isiphekepheke sangaphandle |
Imitha yamasuntswana anamandla aphezulu |
Ayinakumelana nokuvezwa kwexesha elide |
Polyimide / PEEK |
Idosi ephezulu ye-gamma inzala (>100 kGy) |
>100 kGy |
Ilahleko yamandla>80% |
Polyimide |
Isishwankathelo – Yazi uMda
Inqanaba lethamo lemitha |
PTFE Tape Performance |
Ingcebiso |
< 10 kGy (ukuvalwa kokutya) |
Akukho ukuthotywa okubonakalayo; iimpawu zoomatshini zigcinwe ubukhulu becala |
✅ Ikhuselekile ukuba ingasetyenziswa |
10 – 50 kGy (ukuvalwa konyango) |
Ezinye embrittlement; amandla okuqina ancitshiswe ngama-30-50% |
⚠️ Sebenzisa kube kanye, emva koko ubuyisele |
50 - 100 kGy |
Ukuxhatshazwa okukhulu; ukuqhekeka komphezulu |
❌ Ayikhuthazwa |
> 100 kGy |
Izinto eziphathekayo ziyawa; ikhupha iigesi ezonakalisayo |
❌ Akuvumelekanga – sebenzisa i-polyimide okanye iPEEK |
Ithayiphu engundoqo: Ukumelana nemitha ebuthathaka luthintelo olukhulu lwe -PTFE itheyiphu yobushushu obuphezulu . Ifaneleke kuphela kwiindawo ezinemitha ephantsi yedosi (ukutya kunye nokuvalwa konyango). Inikezela ngokugqwesileyo kokumelana nobushushu obuphezulu kunye nokuzinza kweekhemikhali kwezo seto. Kwimimandla yokukhanya kwemitha ephezulu efana nezixhobo zenyukliya okanye iziphekepheke, imathiriyeli yobuchwephesha ekwaziyo ukumelana nemitha kufuneka yamkelwe.
Isishwankathelo , iteyiphu ye-PTFE ayiyonto ekwaziyo ukumelana nemitha. Kwi-1 kGy nje yokuvezwa kwe-gamma, amandla ayo okuqina ehla ukuya kuma-25% oqobo. Ifanelekile kuphela kwizicelo zedosi ephantsi njengokutya kunye nokuvala inzala yonyango (≤50 kGy). Kwiidosi ezongezelekayo ngaphezulu kwe-100 kGy – njengee-core reactor zenyukliya, iilophu eziphambili, okanye umphandle wesiphekepheke – i-PTFE ayivumelekanga.
Ukuba isicelo sakho sibandakanya ukusasazeka kwemitha, qala umisele idosi eyongezelekayo elindelekileyo. Ngaphantsi kwe-10 kGy, i-PTFE tape isebenza kakuhle. Phakathi kwe-10-50 kGy, sebenzisa kanye kwaye ubeke endaweni. Ngaphezulu kwe-50 kGy, tshintshela kwi-polyimide okanye i-PEEK.
Ngaba ufuna uncedo ekukhetheni iteyiphu elungileyo kwindawo yemitha? I-Aokai PTFE inokubonelela ngedatha yovavanyo oluthile lwedosi kunye nezinye iingcebiso. Qhagamshelana nathi ngomthombo wakho wemitha, ithamo elilindelekileyo, kunye neenkcukacha zesicelo.
Olu lwazi lungentla lunikezelwa ngu I-Jiangsu Aokai yeZixhobo eziNtsha zeTekhnoloji Co., Ltd.
Ukuba unqwenela ukwazi ngakumbi malunga neeparitha ezineenkcukacha, iimeko zesicelo, kunye nezisombululo ezilungiselelwe umgca wemveliso yethu epheleleyo, kubandakanya i-PTFE ilaphu lobushushu obuphezulu, i-PTFE iteyiphu yobushushu obuphezulu, i-PTFE high-temperature mesh belt, ibhanti lomatshini wokuthunga elingenamthungo, ilaphu le-PTFE elinamacala elinye, ibhanti elinobushushu obuphezulu kunye ne-high-temperature resistant please feel-high-temperature resistant. simahla ukunxibelelana nathi:
Sibambelela kwifilosofi yobungcali kunye nokuthembeka, kwaye sizimisele ukukunika izisombululo zokumisa kunye neenkonzo ezicingayo.
