Tungsten hlau: Nws yog siv los ua tungsten-rhodium thermocouples thiab ceev-coupled hau, sapphire-bonded xov hlau, thiab electrodes rau lasers loj. Nws kuj yog siv los ua cov filaments thiab cov raj cathodes. Xyoo 2005, ntau lub hom phiaj tungsten-rhenium alloy hlau tsim los ntawm peb lub tuam txhab tau teev tseg raws li lub teb chaws tseem ceeb cov khoom tshiab los ntawm Ministry of Science thiab Technology.
Tungsten-rhenium thermocouple hlau muaj qhov sib txawv ntawm 3120-3360 ° C thiab tuaj yeem siv txog 3000 ° C. Nws yog cov hlau resistant tshaj plaws thermocouple. Nws muaj qhov zoo ntawm kev sib raug zoo ntawm kev kub thiab electromotive quab yuam, txhim khu kev qha thermal stability thiab tus nqi qis. Nws yog txuam nrog cov khoom ntsuas. Qhov ntsuas kub uas tuaj yeem ntsuas ncaj qha yog tam sim no ntsuas ntawm qhov kub siab tshaj 1600 ° C. Txoj kev tsis sib cuag yog feem ntau siv. Txawm li cas los xij, qhov yuam kev ntawm txoj kev no yog qhov loj. Piv txwv li, qhov kev sib cuag kub tuaj yeem ntsuas qhov tseeb qhov kub thiab txias. Hauv cov thermocouples siab kub, cov hlau zoo nkauj thermocouples (platinum-rhodium thermocouples) yog kim thiab qhov kub siab tshaj plaws tsuas yog qis dua 1800 ° C, thaum tungsten-rhodium thermocouples tsis tsuas muaj qhov kub thiab txias tab sis kuj zoo stability, yog li ntawd, tungsten- rhodium thermocouples Nws yog dav siv nyob rau hauv metallurgy, tsev cov ntaub ntawv, aerospace, aviation thiab nuclear zog industries. Nws qhov siab tshaj plaws ua haujlwm kub tuaj yeem ncav cuag 2800 ° C, tab sis ntawm ntau tshaj 2300 ° C, cov ntaub ntawv tau tawg. Tungsten-rhenium thermocouples kuj tseem muaj oxidizable, yog li lawv tuaj yeem siv rau hauv lub tshuab nqus tsev, txo qis, lossis inert cua ntawm qhov kub ntawm 0 txog 2300 ° C. Tungsten bismuth khub niam txiv nrog cov raj tshwj xeeb tiv thaiv kuj tuaj yeem siv tau ntev hauv qhov chaw oxidizing ntawm 1600 ° C. Lawv pheej yig dua platinum-rhodium thermocouples thiab tsis tuaj yeem siv rau hauv cov huab cua uas muaj cov pa roj carbon monoxide (xws li hauv cov huab cua uas muaj hydrocarbon, kub tshaj 1200 ° C yog raug corrosion). Tungsten los yog tungsten ruthenium nyhav tsim cov carbides ruaj khov nyob rau hauv ib qho chaw uas muaj cov pa roj carbon monoxide, yog li ntawd nws rhiab heev yog txo qis thiab nkig tawg yog tshwm sim, thiab nyob rau hauv lub xub ntiag ntawm hydrogen, carbonization yog ceev. Lub tuam txhab tshwj xeeb hauv kev tsim cov tshuaj tiv thaiv oxidation tungsten-rhodium thermocouples. Qhov kub zoo tshaj plaws yog 0-1500 ° C. Cov qauv yog ob-txheej lossis peb-txheej (tsis yog siv feem ntau) cov raj tiv thaiv. Lub raj tiv thaiv sab nrauv ntawm ob chav tiv thaiv raj qauv yog ultra-ntshiab corundum raj. Lub raj tiv thaiv sab hauv yog molybdenum silicide raj, thiab lub raj tiv thaiv sab nraud ntawm peb lub tes tsho yog recrystallized silicon carbide raj los yog lub raj tshwj xeeb ntshiab corundum, lub raj nruab nrab thiab lub raj tiv thaiv sab hauv yog tib yam li ob lub raj hom, thiab Lub raj ntim cov khoom siv yog cov khoom siv kub kub insulating (tej zaum yuav siv sij hawm ntev hauv qab 1800 ° C), lub tshuab nqus tsev sealing thiab txias-kawg sealing (cov nplaum nplaum siv tau ntawm qhov kub qis dua 300 ° C rau lub sijhawm ntev) kom tsis muaj residual oxygen nyob rau hauv lub raj. Cov khoom no yog tsim los siv rau hauv lub tshuab nqus tsev, txo qis thiab lwm yam inert gases (0 ~ 1650 ° C) Qhov ntsuas kub zoo tshaj plaws hauv qhov chaw oxidizing yog 0 txog 1500 ° C. Lub sij hawm tsis tu ncua: ≥180s