Lub Hniav Insulator-Vim li cas Magnesium Oxide Zoo txiav txim siab lub neej ntawm lub rhaub
Muaj ib qho khoom siv hauv txhua lub tshuab cua sov uas tsis tshua tau txais kev saib xyuas nws tsim nyog. Nws tsis yog cov hlau tsis kam. Nws tsis yog hlau sheath. Nws yog cov hmoov dawb ntim nruab nrab ntawm lawv -magnesium oxide (MgO). Thiab nyob rau hauv 900℃cartridge rhaub, qhov zoo ntawm cov hmoov no tuaj yeem txhais tau tias qhov sib txawv ntawm xyoo ntawm kev pabcuam txhim khu kev qha thiab kev ua tsis tiav uas kaw lawm.
Dab tsi Magnesium Oxide Ua tiag tiag
Magnesium oxide ua haujlwm ob qho tseem ceeb hauv lub tshuab cua sov. Ua ntej, nws muab hluav taws xob rwb thaiv tsev ntawm cov hlau tsis kam thiab cov hlau sheath. Cov xaim nqa cov hluav taws xob muaj zog heev-feem ntau 220V lossis 380V-thiab tsis muaj kev rwb thaiv tsev zoo, qhov hluav taws xob ntawd yuav arc mus rau hauv lub hnab, tsim kom muaj luv luv thiab muaj peev xwm txaus ntshai. Qhov thib ob, MgO ua cua sov los ntawm cov hlau mus rau hauv lub plhaub. Nws yuav tsum yog ob qho tib si hluav taws xob rwb thaiv tsev thiab thermal conductor-ib qho kev xav tsis sib xws.
Teeb meem Purity
Tsis yog tag nrho magnesium oxide yog tsim sib npaug. Standard -qib MgO tej zaum yuav muaj purity theem nyob ib ncig ntawm 95–97%. Qhov ntawd suab siab, tab sis ntawm 900 degree, cov impurities ua teeb meem. Cov impurities tuaj yeem txav mus los ntawm qhov kub thiab txias, tsim txoj hauv kev los ntawm kev rwb thaiv tsev. Nyob rau tib lub sijhawm, cov kev no ua rau txo cov rwb thaiv tsev tiv thaiv, ua kom muaj hluav taws xob ntau ntxiv, thiab thaum kawg, hluav taws xob tawg.
High -zoo 900℃cartridge rhaub siv magnesium oxide nrog purity ntawm 99.5% lossis siab dua. Qhov no ultra-siab- cov ntaub ntawv purity tswj nws cov khoom dielectric txawm tias nyob rau hauv lub caij ntuj sov raug kub heev. Qee cov tuam ntxhab siv MgO ntshuam los ntawm cov chaw muag khoom tshwj xeeb kom ntseeg tau tias zoo ib yam.
Tus Txheej Txheem Ceev
Purity tsuas yog ib nrab ntawm zaj dab neeg. Qhov ntom ntawm cov ntim MgO tseem ceeb npaum li cas. Thaum lub sij hawm tsim khoom, MgO yog compressed nyob ib ncig ntawm cov hlau tsis kam los ntawm cov txheej txheem hu ua swaging lossis compaction. Cov compaction ceev siab dua-feem ntau siab dua 3.0 g/cm³- txhim kho thermal conductivity los ntawm kev tsim cov ntsiab lus sib txuas ntxiv ntawm MgO hais. Qhov no rub tawm cov cua sov tawm ntawm cov hlau tsis muaj zog ntau dua, ua kom cov hlau kub qis dua rau qhov muab qhov kub thiab txias.
Tsawg- ntom MgO, ntawm qhov tod tes, ua zoo li daim pam thermal. Thaum tshav kub kub tau daig ib ncig ntawm cov hlau, ua rau nws khiav kub tshaj qhov yuav tsum tau. Cov hlau oxidizes sai dua, txhim kho qhov kub thiab txias, thiab thaum kawg ua tsis tiav. Lub compaction ntom kuj muaj feem xyuam rau cov neeg kho tshuab stability-looly packed MgO tuaj yeem kho lossis hloov mus rau lub sijhawm, tsim cov voids uas ua rau txo qis thermal ua haujlwm ntxiv.
Qhov Teeb Meem Dej
Magnesium oxide yog hygroscopic - nws absorbs noo noo los ntawm huab cua. Qhov no yog ib qho teeb meem loj vim tias cov dej noo txo cov rwb thaiv tsev. Lub tshuab cua sov uas tau muab khaws cia rau hauv qhov chaw ntub dej tuaj yeem tsim cov hluav taws xob xau thaum thawj lub tshuab hluav taws xob, uas tuaj yeem cuam tshuam cov hluav taws xob hluav taws xob lossis tsim teeb meem kev nyab xeeb.
High- cov khoom siv hluav taws xob zoo tshaj plaws nyob rau hauv ob txoj hauv kev. Ua ntej, lawv siv tshwj xeeb kho lossis "hloov" MgO uas tsis tshua muaj kev nqus dej noo. Qhov thib ob, lawv kaw qhov kawg ntawm lub rhaub kom zoo kom tsis txhob ya raws qhov nkag. Lub foob yuav yog cov hlaws ceramic, silicone sealant, lossis iav -zoo li cov khoom siv rau qhov kub thiab txias.
Leakage Current: Lub Cim Ceeb Toom
Cov dej ntws tawm tam sim no yog ib qho kev txhim khu kev qha tshaj plaws ntawm rwb thaiv tsev noj qab haus huv. Rau lub qhov dej- tsim lub tshuab ua kom sov, txias- lub xeev cov xau tam sim no yuav tsum tsis pub tshaj 0.5 mA. Nyob rau hauv kev ua haujlwm ntawm qhov kub thiab txias, qhov ntws tawm tam sim no yuav tsum qis dua - feem ntau qis dua 0.12 mA.
Yog tias cov dej xau pib nkag mus rau lub sijhawm, nws feem ntau yog qhov qhia tias MgO rwb thaiv tsev yog degrading. Qhov ua rau tuaj yeem yog cov dej noo nkag mus, kev sib kis ntawm qhov kawg ntawm qhov kawg, lossis kev puas tsuaj ntawm MgO nws tus kheej vim yog overheating. Kev saib xyuas tsis tu ncua ntawm cov dej xau tuaj yeem muab kev ceeb toom ntxov ntawm kev ua tsis tiav, tso cai rau kev teem sijhawm hloov ua ntej kev tsim khoom raug cuam tshuam.
Qhov no txhais li cas hauv kev xyaum
Rau daim ntawv thov 900 degree, skimping ntawm MgO zoo yog kev lag luam cuav. Tus nqi sib txawv ntawm tus qauv - qib thiab siab - purity MgO yog me me piv rau cov nqi ntawm cov khoom poob qis, hloov kev ua haujlwm, thiab cov khoom poob. Kev nqis peev rau hauv lub tshuab cua sov nrog siab -purity, siab - ntom MgO thiab kev txiav tawm kom raug yog ib qho ntawm cov nqi tshaj plaws - kev txiav txim siab zoo uas tus kws kho tsheb tuaj yeem ua.
Txawv kev khiav hauj lwm ib puag ncig muab sib txawv xav tau ntawm lub rwb thaiv tsev system. High -cov av noo ib puag ncig xav tau kev saib xyuas ntxiv rau kev sib khi thiab tiv thaiv kev ya raws. Cov ntawv thov uas nquag caij tsheb kauj vab ua rau muaj kev ntxhov siab sib txawv ntawm MgO dua li kev ua haujlwm ruaj khov- xeev. Kev nkag siab txog cov xwm txheej no thiab xaiv lub tshuab cua sov nrog cov txheej txheem rwb thaiv tsev tsim nyog yog qhov tseem ceeb rau kev cia siab ntev -.
