PTFE Cov Cuab Yeej Siv Tau Li Cas Los Ua Cov Nroj Tsuag Ua Kua Hlau thiab Lwm Cov Kab Ntau Lawm?

Cov chaw soj ntsuam tshawb fawb thiab cov txheej txheem tshuaj tshwj xeeb qee zaus yuav tsum muaj cua sov rau hauv cov xov xwm nyob deb sab nraum cov kua qaub lossis cov kev pabcuam caustic. Molten ntsev rau cua sov-hloov loops, kua hlau xws li gallium nyob rau hauv semiconductor kev tshawb fawb, organic peroxides nyob rau hauv polymerization, los yog halogen-muaj cov mixs nyob rau hauv advanced synthesis tag nrho cov xav tau cov ntaub ntawv uas muaj sia nyob tej yam kev mob. PTFE muaj cov tshuaj tsis sib haum xeeb hauv cov ntawv thov, tab sis cov xov xwm txawv no qhia txog qhov kub thiab txias, kev ua haujlwm tsis zoo, thiab cov khoom siv sib tw uas cov qauv sib xws tsis tshua muaj nyob. Cov kws tshawb fawb tshawb fawb thiab cov kws tsim tshuaj tshwj xeeb yuav tsum yog li ntsuas qhov tsim nyog los ntawm rooj plaub ua ntej ua cov cuab yeej peev. Molten Salts Ntau cov ntsev molten ua haujlwm zoo tshaj PTFE qhov txuas ntxiv - siv txwv ntawm 260℃. Nitrate ntsev xws li sodium nitrate-potassium nitrate sib tov, piv txwv li, ua haujlwm ntawm 300-550℃thiab tam sim ntawd dhau ntawm polymer lub thermal stability. qis dua - melting eutectics xws li qee yam acetate lossis formate blends tseem ua kua hauv qab 200℃thiab tuaj yeem ua tau sib xws tau muab cov tshuab ua kom puas tseem tsawg. Cov khoom me me lossis crystallization thaum lub sij hawm txias - cov voj voog qis qis ua rau cov PTFE cov ntaub mos mos, ua rau cov chaw ua kom nyias nyias txawm tias tsis muaj tshuaj tua kab mob. Nyob rau hauv xws li cov ntaub ntawv tiv thaiv los yog txo watt - qauv tsim kom ntev kev pab cuam lub neej, tab sis lub rhaub tseem yuav tsum tau soj ntsuam raws sij hawm rau nto hnav. Liquid Metals Compatibility nrog cov kua hlau sib txawv nrog cov ntsiab lus tshwj xeeb thiab kub. Mercury thiab gallium ntawm qhov kub nruab nrab (qis dua 150 degree) tsim kev cuam tshuam tsis zoo nrog PTFE; ntau lub tshuab tshawb fawb tau ua tiav rau xyoo. Nyob rau hauv sib piv, molten alkali hlau xws li sodium thiab poov tshuaj tua PTFE nruj heev los ntawm defluorination cov tshuaj tiv thaiv, stripping fluorine atoms thiab tawm hauv cov pa roj carbon - nplua nuj residue. Cov tshuaj tiv thaiv no nce siab tshaj 300℃thiab tuaj yeem ua rau tawg sai sai. Cov kua txhuas los yog zinc ntawm lawv cov ntsiab lus melting kuj ua rau muaj kev pheej hmoo ntawm kev sib tsoo los yog kev siv tshuab. Cov engineers yuav tsum tau lees paub qhov tseeb ntawm cov hlau thiab kev ua haujlwm kub ua ntej xaiv. Organic Peroxides thiab Halogen Organic peroxides qhia txog kev pheej hmoo sib txawv. Qee cov peroxides decompose ntawm qhov kub thiab txias thiab tsim cov dawb radicals uas pib saws tes los yog nto oxidation hauv PTFE. Thaum dilute aqueous daws nyob twj ywm feem ntau muaj kev nyab xeeb, cov ntaub ntawv concentrated lossis anhydrous yuav tsum tau ua tib zoo saib xyuas. Halogens muaj kev coj cwj pwm zoo sib xws. Qhuav fluorine roj los yog chlorine trifluoride reacts exothermically nrog PTFE txawm nyob rau hauv chav tsev kub, ua rau sai degradation. Dilute aqueous hydrofluoric acid los yog bromine cov kev daws teeb meem, txawm li cas los xij, niaj hnub ua haujlwm yam tsis muaj kev cuam tshuam los ntawm qhov kub thiab txias. Qhov sib txawv ntawm cov roj qhuav thiab cov ntaub ntawv ntub dej los yog diluted ua pov thawj tseem ceeb. Daim ntawv thov kev lees paub los ntawm kev kuaj daim coupon Tsis muaj daim ntawv qhia dav dav npog txhua qhov sib txawv nruab nrab ntseeg tau. Tib txoj hauv kev uas tuaj yeem ntseeg tau yog kev thov ncaj qha rau kev siv tau. Cov neeg tsim khoom muab cov qauv PTFE daim coupon me me zoo ib yam hauv qib thiab tuab rau lub tshuab ua kom sov. Cov daim coupon no tau nkag mus rau hauv cov txheej txheem tiag tiag hauv cov neeg sawv cev kub, siab, thiab kev ntxhov siab rau yam tsawg kawg ntawm plaub mus rau yim lub lis piam. Qhov hnyav hloov, tensile lub zog tuav, hardness saum npoo, thiab kev kuaj pom / microscopic kom muaj nuj nqis degradation. Nyob rau hauv kev xyaum PTFE cua sov tau ntse siv nyob rau hauv molten sulfur daim ntaub ntawv mus txog 150 degrees Celsius tab sis cov neeg kho tshuab puas los ntawm cov khoom hais yog teeb meem ntau tshaj li tshuaj tua kab mob. Ib txoj hauv kev zoo rau cov ntawv thov tshiab tiag tiag yog ua daim coupon xeem nthuav tawm ib qho me me ntawm PTFE rau cov txheej txheem tiag tiag rau ob peb lub lis piam ua ntej cog lus rau lub rhaub tag nrho. Cov txiaj ntsig zoo-tsawg dua 1% poob phaus thiab khaws cia yooj yooj yim- ua kom tiav qhov kev ua tiav; ntsuas kev tawm tsam los yog embrittlement xav tau lwm cov ntaub ntawv sheath los yog txheej txheem redesign. Cov Lus Qhia Tshwj Xeeb Cov Lus Qhia Thaum kuaj daim coupon pom zoo, qhia kom txo qis watt ceev (feem ntau yog 30–50% ntawm huab cua ntsuas) kom them nyiaj rau cov cua sov hloov pauv- hloov cov yam ntxwv hauv siab -viscosity lossis siab -kub xov xwm. Thov lub tshuab nqus tsev- ci lossis qis- cov qhab nia tawm qhov purity tseem ceeb. Rau cov ntawv thov uas cuam tshuam nrog kev puas tsuaj, muab cov kab thaiv sab nraud los yog tuab dua -cov ntaub thaiv phab ntsa. Terminal enclosures yuav tsum nyob twj ywm saum cov kua theem thiab koom nrog corrosion{58}}cov ntaub ntawv tiv taus sib xws nrog txhua theem vapor. Kev ua haujlwm yuav tsum muaj xws li maj mam ua kom sov- nce thaum saib xyuas qhov kub thiab qhov rwb thaiv tsev kom paub meej tias kev ua haujlwm ruaj khov. PTFE tuaj yeem tuav cov xov xwm txawv txawv thaum cov kev txwv kev ua haujlwm sib haum nrog cov khoom muaj peev xwm, tab sis nws tsis yog universal. Exotic media, molten ntsev compatibility, kua hlau tsis kam, daim coupon kuaj, thiab daim ntawv thov validation yog li ntawd los ua ib qho tseem ceeb kev txiav txim. Rau cov ntawv thov nyuaj tshaj plaws kev koom tes nrog cov chaw tsim khoom uas tuaj yeem muab daim coupon xeem thiab tsis ua haujlwm kev txhawb nqa yog txoj hauv kev nyab xeeb tshaj plaws rau kev ua tiav. Cov kev sib koom tes no muab cov ntaub ntawv kev ua tau zoo, kev xaiv tsim, thiab kev txhawb nqa tom qab- txhim kho uas txo qis kev pheej hmoo thiab ua kom ntseeg tau tias kev ua haujlwm ruaj khov txawm tias qhov xav tau tshwj xeeb tshaj plaws tshuaj lom neeg thiab kev tshawb fawb ib puag ncig.