Cov hnab looj tes tshawb fawb, ntim nrog ultra-ntshiab argon thiab nrog cov pa oxygen thiab noo noo ntsuas hauv qhov chaw-ib lab, yog siv los lis cov khoom siv roj teeb uas muaj zog heev. Lub tshav kub platen ntsia rau hauv lub pristine no, kaw lub thawv tsis tuaj yeem yog qhov chaw ntawm kev sib kis. Ib tug qauv, pleev xim rau, thiab greasy industrial platen yuav ntsiag to outgas ib huab ntawm noo noo, kuab tshuaj, thiab plasticizers, lom rau rhiab kev sim. Kev qhia txog lub platen rau ib qho chaw tsis zoo hauv lub hnab looj tes yog ib qho kev tawm dag zog hauv cov khoom siv purity heev.
Kab lus no qhia txog qhov yuav tsum tau uacua sov platen inert cua glovebox specificationrau daim ntawv thov qhov twg outgassing los yog particulate tso tawm yog tsis tsim nyog. Cov txheej txheem npog cov ntaub ntawv, kev tsim kho cua sov, kev sib khi, thiab kev kuaj xyuas kom huv.
Vim li cas Standard Platens tsis haum rau Glovebox siv
Qhov chaw ntawm Cov Kab Mob Hauv Paus Platens
Ib qho kev lag luam cua sov phaj muaj ntau yam ntaub ntawv uas tawm ntawm cov khoom siv hluav taws xob tsis zoo (VOCs), noo noo, thiab lwm yam khoom paug thaum cua sov:
Xim los yog hmoov txheejnyob rau sab nrauv
Anodized los yog plated tiavuas ntxiab ua cov tshuaj
Polymeric cable rwb thaiv tsev(PVC, roj hmab, lossis qauv silicone) uas tso cov yas yas
Adhesive-bonded heatersuas outgas los ntawm cov nplaum txheej
Roj av los yog roj residueslos ntawm machining los yog sib dhos
Sealing gasketsUa los ntawm cov pa elastomers (nitrile, EPDM, neoprene)
Thaum xws li lub platen yog rhuab mus rau nws qhov kev khiav hauj lwm kub nyob rau hauv ib lub hnab looj tes kaw, cov ntaub ntawv no tso ib tug tsis tu ncua kwj ntawm cov kab mob uas yuav adsorb mus rau reactive cov qauv, hloov nto chemistry, los yog raug kuaj raws li suab nrov tom qab nyob rau hauv analytical instruments.
Cov txiaj ntsig ntawm Outgassing
Txawm tias tsawg npaum li cas ntawm cov tsiaj uas tawm hauv av- dej vapor, hydrocarbons, lossis silicone roj- tuaj yeem:
Oxidize air-sensitive cov ntaub ntawv (xws li, lithium hlau, organometallic compounds)
Poison catalysts los yog electrocatalysts
Ua rau kev nyeem tsis tseeb hauv huab hwm coj spectrometry lossis roj chromatography
Condense ntawm qhov rais kho qhov muag, txo cov pob tshab
Yog li ntawd, lub hnab looj tes-compatible platen yuav tsum tau tsim los tso tawm qhov tseem ceeb tsis muaj dab tsi rau hauv qhov chaw.
Cov ntsiab lus tseem ceeb rau Glovebox-Compatible Heating Platen
Platen Lub Cev Khoom
Lub platen lub cev yuav tsum tau tsim los ntawm cov khoom uas tsis outgas thiab tuaj yeem ntxuav kom huv si. Qhov kev xaiv zoo tshaj plaws yog:
316L stainless hlau, electropolished mus rau ib tug du, passive nto tiav. Electropolishing tshem tawm cov oxides saum npoo thiab embedded particles, tsim kom huv si, tsis-porous txheej. Lwm cov khoom siv tau suav nrog 304L lossis 316Ti, tab sis 316L muaj kev tiv thaiv corrosion zoo dua.
Lub platen yuav tsum tsis muaj xim, anodizing, polymeric txheej, lossis plated tiav. Cov hlau liab liab tsuas yog siv tau qhov chaw.
Cua sov Element: Mineral-Insulated, Hermetically kaw
Cov khoom cua sov uas nyob rau hauv los yog txuas nrog lub platen yuav tsum tsis txhob outgas. Cov kab hluav taws xob polymer-insulated cua sov yog txwv tsis pub. Qhov tseeb technology yog:
Mineral-insulated (MgO) cartridge rhaubnrog stainless hlau sheath.
Hermetically kaw lub hau kawg- laser-welded los yog electron-beam-welded los tiv thaiv ya raws los yog outgassing los ntawm MgO hmoov sab hauv.
Tsis muaj cov organic potting compoundsnyob rau hauv lub davhlau ya nyob twg cheeb tsam.
Cov ntxhia rwb thaiv tsev (magnesium oxide) yog inorganic thiab ruaj khov ntawm qhov kub thiab txias. Thaum muab kaw kom zoo, nws tsis nqus los yog tso tawm cov dej noo uas ntsuas tau.
Hluav taws xob thiab cable rwb thaiv tsev
Tag nrho cov xaim uas nkag mus rau hauv lub hnab looj tes (lub hwj chim coj, thermocouple lossis RTD coj) yuav tsum siv cov khoom siv hluav taws xob tsawg. Cov kev xaiv tau muaj xws li:
Polyimide (Kapton®)- Tsawg outgassing, high-temperature ntsuas (txog 200℃hauv huab cua, siab dua nyob rau hauv inert cua). Kapton yog siv dav hauv kev siv lub tshuab nqus tsev thiab hnab looj tes.
Mineral-insulated (MI) cable- Qhov kev xaiv zoo tshaj plaws rau qhov siab tshaj plaws purity. MI cable muaj cov hlau sheath (stainless hlau), MgO rwb thaiv tsev, thiab ib qho los yog ntau yam sab hauv conductors. Nws yog kiag li inorganic thiab hermetic.
Txwv tsis pub cov ntaub ntawv rwb thaiv tsev:PVC, polyethylene, standard silicone roj hmab, Teflon ™ FEP (uas outgasses ntawm siab kub), thiab tej yam khoom uas muaj plasticizers.
Junction Box: Gas-Tight Stainless Hlau nrog Nqus-Rated Connector
Lub thawv sib txuas uas lub hwj chim thiab sensor coj mus txuas yuav tsum yog:
Khoom tsis muaj hlau(304 lossis 316L), welded tsim - tsis muaj cam khwb cia txhuas lossis yas thawv.
Gas nruj- muaj peev xwm tswj tau qhov xau tsawg dua 1 × 10−61 × 10−6 mbar·L / s (helium leak-tested).
Nruab nrog high-vacuum-rated hermetic connector(piv txwv li, ib tug multi-pin feedthrough nrog ceramic rwb thaiv tsev los yog ib tug mineral-insulated cable hla dhau). Txheem cable caj pas lossis compression fittings tsis tau txais vim tias lawv xau.
Lub connector yuav tsum tau ntsuas rau qhov ntsuas kub ntawm lub platen thiab tsawg kawg yog 1 × 10−71 × 10−7 mbar·L / s xau tus nqi. Cov kev xaiv uas muaj xws li:
Ceramic-sealed multipin connectors(eg, MDC, Kurt J. Lesker)
Mineral-insulated feedthroughsqhov twg MI cable hla ncaj qha los ntawm lub raj welded
Tag nrho cov hlws ris lub thawv yuav tsum tau welded rau lub platen lub cev los yog txuas nrog ib tug hlau gasket (tsis muaj elastomer seals). Yog tias lub foob tsis tuaj yeem zam tau, yuav tsum siv tooj liab lossis indium gasket.
Purity Verification thiab Documentation
Kev xeem tawm ntawm ASTM E595
Cov ua tiav cua sov platen sib dhos yuav tsum raug kuaj rau outgassing raws liASTM E595 - Txoj Kev Xeem Txuj Ci rau Tag Nrho Cov Poob Poob thiab Sau Cov Khoom Siv Hluav Taws Xob los ntawm Outgassing hauv Lub Nqus Ib puag ncig. Qhov kev ntsuas no tau ua nyob rau hauv lub tshuab nqus tsev siab ntawm 125℃rau 24 teev thiab ntsuas:
Total Mass Loss (TML)- Qhov feem pua ntawm cov qauv thawj zaug poob raws li cov volatiles. Yuav tsum tau siv hnab looj tes:< 1.0%(zoo dua <0.5%).
Cov khoom siv hluav taws xob tsis zoo (CVCM)- Qhov feem pua ntawm cov volatiles uas condense ntawm 25℃collector phaj. Yuav tsum tau:< 0.1%(zoo dua <0.05%).
Water Vapor Recovered (WVR)- Xaiv tau tab sis feem ntau tshaj tawm. Kev ywg dej tsawg yog xav tau.
Tus neeg muag khoom yuav tsum muab daim ntawv pov thawj ntawm kev ua raws li ASTM E595, suav nrog qhov ntsuas TML thiab CVCM qhov tseeb.
Vacuum Bake-Out
Ua ntej xa khoom, tag nrho cov platen sib dhos yuav tsum raug rau lub tshuab nqus tsev ci-tawm txheej txheem kom tshem tawm cov khoom seem ntawm cov dej noo thiab cov organic sib txuas uas yuav tau adsorbed thaum lub sijhawm tsim khoom. Ib qho yooj yim ci-tawm lub voj voog:
Kub:120-150℃(los yog qhov siab tshaj plaws ua haujlwm kub, qhov twg yog qhov qis dua)
Siab:qis dua 10−410−4 mbar (zoo dua 10−510−5 mbar)
Duration:24-48 teev
Cua txias:nyob rau hauv lub tshuab nqus tsev los yog qhuav argon ntxuav
Tom qab ci tawm, lub platen tau muab ntim rau hauv ib lub hnab huv, roj-nruj backfilled nrog argon los yog nitrogen thiab xa nrog lub pob desiccant. Lub ntim yuav tsum qhib tsuas yog nyob rau hauv lub hnab looj tes.
Helium Leak Test
Tag nrho cov seals hermetic-xws li lub taub hau kawg, lub thawv sib txuas, thiab cov khoom siv hluav taws xob- yuav tsum tau kuaj xyuas helium. Qhov pom tau los ntawm tus nqi rau lub hnab looj tes cua sov platen yog feem ntau<1×10−8<1×10−8 mbar·L/s (or better). The test report should be included in the documentation.
Daim ntawv pov thawj ntawm kev huv
Tus neeg muag khoom yuav tsum muab daim ntawv pov thawj hais tias:
Cov ntaub ntawv ntawm kev tsim kho (qib alloy, hom rwb thaiv tsev)
Tias tsis muaj organic coatings, adhesives, los yog sealants siv
Tias lub rooj sib txoos tau degreased nrog cov kuab tshuaj uas tsis tshua muaj (xws li acetone lossis isopropyl cawv) ua raws li deionized dej yaug thiab ntxuav ultrasonic
Tias qhov kev sib dhos zaum kawg tau ua nrog cov hnab looj tes huv thiab ntim rau hauv ib puag ncig tsis muaj qhov tsis zoo (ISO Class 5 lossis zoo dua)
Kev xav tsim ntxiv rau kev sib koom ua ke ntawm Glovebox
Kub Sensor Specification
Lub thermocouple lossis RTD siv rau kev tswj qhov kub thiab txias yuav tsum ua kom tau raws li qhov yuav tsum tau ua. Ib qho ntxhia-insulated, stainless-sheathed Hom K lossis Hom N thermocouple nrog kev sib tshuam tsis sib haum thiab cov ntsaws ruaj ruaj hermetic raug pom zoo. Polymer-insulated thermocouples tsis tau txais. Thermocouple leads yuav tsum tawm ntawm lub hnab looj tes los ntawm ib tug hermetic feedthrough.
Lub zog Feedthrough rau hauv Glovebox
Lub platen lub zog thiab sensor cables yuav tsum dhau los ntawm phab ntsa glovebox los ntawm cov ntawv pov thawj hermetic feedthrough. Ib txoj hauv kev yog los nruab ib lub tshuab nqus tsev multipin feedthrough (xws li, nrog cov rwb thaiv tsev ceramic) ntawm lub hnab looj tes flange thiab txuas cov platen cables hauv lub thawv. Lub platen nws tus kheej yuav tsum muaj ib tug mating hermetic connector, tsis yog ib tug pigtail uas kis ncaj qha los ntawm ib tug compression caj pas.
Grounding rau kev nyab xeeb
Txawm hais tias muaj huab cua inert, yuav tsum muaj hluav taws xob tsim nyog. Lub platen lub cev stainless hlau yuav tsum tau txuas nrog lub hnab looj tes hauv av siv lub pluaj huv si, liab qab hlau hauv av. Yuav tsum tsis txhob siv cov roj nplaum los yog cov khoom siv los tiv thaiv lub hauv paus.
Daim ntawv teev cov khoom txwv txwv
Cov ntaub ntawv hauv qab no raug txwv nruj me ntsis rau hauv lub hnab looj tes-tshaj qhov cua sov platen:
| Cov khoom txwv tsis pub | Yog vim li cas |
|---|---|
| Xim, hmoov txheej, anodizing | Outgassing, particle shedding |
| Silicone roj hmab | High outgassing ntawm cyclic siloxanes |
| PVC rwb thaiv tsev | Plasticizers outgas, chlorine tso tawm |
| Standard epoxy potting | Outgassing, noo noo nqus |
| Neoprene lossis nitrile gaskets | Outgassing ntawm cov khoom uas muaj sulfur |
| Teflon ™ PTFE daim kab xev (daim kab xev daj) | Tso cov tshuaj fluorine thaum cua sov |
| Lubricants los yog roj | Outgassing, paug |
| Adhesive-backed heaters | Adhesive outgassing, daim ntawv cog lus tsis ua haujlwm |
Piv txwv li: Specification Summary Table
Rau cov hnab looj tes ua cua sov uas yuav tsum tau ua haujlwm ntawm 150℃hauv qhov chaw argon, daim ntawv qhia tshwj xeeb yuav tsum nyeem:
| Cheebtsam | Kev xav tau |
|---|---|
| Platen lub cev | 316L stainless hlau, electropolished, tsis muaj txheej |
| Cua sov ntsiab | Hermetically kaw, MgO-insulated cartridge rhaub, 316L sheath, laser-welded kawg |
| Kev xaim | Polyimide (Kapton) insulated los yog mineral-insulated cable |
| Lub thawv sib txuas | 316L stainless hlau, welded, gas-tight, helium leak-tested (<1×10⁻⁸ mbar·L/s) |
| Txuas | High-vacuum ceramic-sealed multipin feedthrough |
| Outgassing xeem | ASTM E595: TML<0.5%, CVCM <0.05% |
| Ci tawm | 120 degree, 48 teev, qis dua 10⁻⁴ mbar |
| Ntim | Cleanroom hnab, argon backfill, desiccant |
| Cov ntaub ntawv | Daim ntawv pov thawj rau cov ntaub ntawv, kev xeem xau, outgassing, huv si |
Xaus: Ib qho Bare-Hloov, Cov Cuab Yeej Uas Zoo Tag Nrho
Lub glovebox-compatible heating platen yog ib tug masterpiece ntawm purity ntawm cov ntaub ntawv, ib tug liab qab-hlau, tag nrho kaw thermal ntsuas uas yuav tsis kis tus kab mob rhiab heev ntawm inert ib puag ncig. Los ntawm kev qhia cov khoom, electropolished stainless hlau, lub hermetically kaw ntxhia-insulated rhaub, low-outgassing polyimide los yog MI thaiv, thiab ib tug gas-tight welded hlws ris lub thawv nrog lub tshuab nqus tsev feedthroughs, lub resulting platen ntxiv tsis muaj dab tsi tab sis precisely tswj kub. Kev txheeb xyuas los ntawm ASTM E595 kuaj, helium leak checks, thiab lub tshuab nqus tsev vacuum muab cov ntaub ntawv pov thawj ntawm kev huv. Qhov chaw zoo tshaj plaws yuav tsum muaj cov cuab yeej ua los ntawm tsis muaj dab tsi tab sis cov ntsiab lus tseem ceeb- thiab nyob rau hauv cov ntaub ntawv ntawm ib qho inert-atmosphere hnab looj tes, uas txhais tau hais tias lub cua sov platen stripped ntawm txhua yam extraneous molecule, ntsiag to, kub, thiab ntshiab kiag li.
