Vim li cas thiaj muaj ntau hom tungsten hlau?
Feem ntau cov tungsten filaments yog siv nyob rau hauv zus tau tej cov tungsten thiab halogen incandescent teeb filaments thiab gas paug teeb electrodes. Raws li qhov yuav tsum tau ua rau qhov zoo thiab sib xws ntawm cov teeb pom kev zoo tau dhau los ua nruj dua, cov tuam ntxhab tau kawm los txhim kho cov filament kev ua tau zoo los ntawm kev ntxiv me me ntawm lwm cov ntsiab lus. Cov kev ntxiv no tswj recrystallization, txhim kho sag kuj, stabilize electron emission thiab hloov cov hlau mus rau cov kev cai tshwj xeeb ntawm cov teb.
Lub ntsiab hom ntawm tungsten thiab tungsten alloy hlau
Cov lus hauv qab no qhia txog cov hom hlau sib xws, cov ntsiab lus ntxiv thiab lawv cov ntawv thov tseem ceeb.
| Hom | Cov ntsiab lus ntxiv | Daim ntawv thov |
|---|---|---|
| Ntshiab tungsten hlau | Tsis muaj | Cua sov lub cev, evaporation coils, HID electrodes thiab coils, txhuas hlau, hooks, sab rods |
| Doped tungsten hlau | 0.2-0.4% SiO2, 0.3-0.4% K2O | Ib leeg -coil incandescent filaments, kev txhawb nqa, qhia rods, teeb pom kev zoo |
| Doped tungsten hlau | 0.02-0.05% Al2O3, 0.2-0.4% SiO2, 0.3-0.55% K2O | Coiled -coil incandescent filaments, kev txhawb nqa, cathode raj, tungsten heaters, evaporation heater element, fluorescent filaments |
| Doped thorium tungsten xov hlau | 0.2-0.4% SiO2, 0.3-0.55% K2O, 0.2-0.5% ThO2 | Kub xov hlau rau electron raj, vuam electrodes, khi pas nrig |
| Thorium tungsten hlau | 1.0%, 1.5% lossis 2.0-2.5% ThO2 | Cathode tubes, HID teeb electrodes, emission tswj kub xov hlau, hooks thiab springs, vuam electrodes |
| Tungsten -cerium hlau | 1.5-3.0% CeO2 | Pulse tube cua sov xov hlau, tsis yog -vuam electrodes |
| Yttrium tungsten xov hlau | 2.0-3.0% Y2O3 | Pulse tube cua sov xov hlau, tsis yog -vuam electrodes, HID electrodes |
| Lanthanated tungsten xov hlau | 1.0-2.0% La2O | Tsis yog -vuam electrodes |
| Tungsten-molybdenum xov hlau | W-20 Mo | Lub teeb hooks, kev txhawb nqa, lub teeb pom kev zoo, lub tshuab nqus tsev twj tso kua mis |
| Tungsten -rhenium xov hlau | 1.0-26.0% Re | Filaments rau cov khoom siv microwave, electron beam raj, CRT filaments |
Ntshiab thiab Doped Tungsten Hlau
Ntshiab tungsten hlau tsis muaj cov khoom siv ntxiv. Nws khaws cov khoom tseem ceeb ntawm tungsten, suav nrog qhov siab tshaj plaws melting point ntawm txhua yam hlau ntawm li 3422 degrees C, siab ceev thiab qis vapor siab ntawm qhov kub thiab txias. Cov khoom no ua rau nws tsim nyog rau lub cev cua sov, evaporation coils, HID electrode thiab coil sib dhos, cov hlau lead, hooks thiab sab rods, qhov chaw ua haujlwm tsis tas yuav tsum muaj qhov tshwj xeeb microstructure tsim los ntawm doping.
Doped tungsten hlau, feem ntau piav raws li tsis yog -sag hlau, muaj kev tswj ntxiv ntawm silicon dioxide thiab potassium oxide, qee zaum nrog txhuas oxide. Thaum lub sij hawm ua, cov poov tshuaj tsim cov npuas zoo uas pin cov ciam teb thiab tsim cov microstructure ntawm elongated, interlocking nplej. Cov qauv no tiv taus sagging thiab deformation ntawm qhov kub thiab txias ntawm incandescent filaments. Doped hlau yog cov khoom siv txheem rau ib zaug -coil thiab coiled-coil incandescent filaments, kev txhawb nqa, cathode tubes, tungsten heaters, evaporation heater elements thiab fluorescent teeb filaments.
Tsis tshua muaj -Lub ntiaj teb thiab Refractory Alloy Hlau
Thorium dioxide txhim kho electron emission, yog li thoriated tungsten xov hlau yog siv nyob rau hauv cathode hlab, siab siv hluav taws xob tawm teeb electrodes thiab vuam electrodes. Cerium, yttrium thiab lanthanum oxides muab cov emissions zoo sib xws - txhim khu kev ua haujlwm, feem ntau xaiv rau cov khoom siv tsis yog - vuam electrodes thiab mem tes raj cua sov xov hlau. Tungsten-molybdenum hlau (W-20Mo) sib txuas lub zog ntawm tungsten nrog kev txhim kho ductility los ntawm molybdenum rau hooks, kev txhawb nqa thiab lub tshuab nqus tsev twj tso kua mis. Tungsten-rhenium hlau, nrog 1.0-26.0% rhenium, muaj qhov zoo dua ductility thiab recrystallization tsis kam, ua rau nws nyiam cov khoom siv rau cov khoom siv hauv microwave, cov hlab ntsha hluav taws xob thiab CRT filaments.
Yuav Ua Li Cas Xaiv Txoj Cai Tungsten Hlau
Xaiv cov hlau hom raws li kev khiav hauj lwm kub, mechanical loading, emission requirements thiab cua. Rau lub teeb filaments uas yuav tsum tuav lawv cov duab ntawm qhov kub thiab txias, xaiv doped non-sag hlau. Rau cov electrodes uas yuav tsum tau ruaj khov electron emission, xaiv thoriated, ceriated los yog lanthanated hom nyob ntawm daim ntawv thov thiab kev tswj xyuas. Rau siab - kub qhov kev pab cuam uas xav tau ductility thiab tsis kam rau kev co, tungsten-rhenium feem ntau yog cov lus teb. Nco ntsoov paub meej cov ntsiab lus ntxiv, txoj kab uas hla kam rau ua thiab qhov chaw nyob nrog tus neeg xa khoom tawm tsam daim ntawv thov.
Cov lus nug nquag
Dab tsi yog qhov txawv ntawm cov ntshiab thiab doped tungsten hlau?
Ntshiab tungsten hlau tsis muaj tshuaj ntxiv, thaum doped hlau muaj me me ntawm silicon, potassium thiab aluminium oxides uas tsim cov qauv tsis yog-sag grain rau siab- kub teeb filaments.
AKS doping ua dab tsi?
AKS doping (txhuas, poov tshuaj, silicon) cov ntaub ntawv elongated interlocking nplej uas tiv taus sagging thiab deformation ntawm qhov kub thiab txias, ncua lub neej filament.
Vim li cas thorium ntxiv rau tungsten hlau?
Thorium dioxide txhim kho electron emission thiab arc stability, uas yog vim li cas thoriated tungsten siv nyob rau hauv cathodes, HID teeb electrodes thiab vuam electrodes.
tungsten -rhenium hlau siv rau dab tsi?
Tungsten-rhenium hlau yog siv rau filaments nyob rau hauv lub microwave li, electron beam raj thiab CRT filaments qhov twg ductility thiab recrystallization kuj yuav tsum tau.
Dab tsi tungsten hlau yog siv rau TIG vuam electrodes?
Thoriated, ceriated, lanthanated thiab yttriated tungsten xov hlau yog txhua yam siv rau cov khoom siv tsis yog - vuam electrodes, nrog rau kev xaiv nyob ntawm kev ua tau zoo emission thiab daim ntawv thov.
Dab tsi yog qhov melting point ntawm tungsten?
Txog 3422 ° C, qhov siab tshaj plaws ntawm tag nrho cov hlau, uas yog vim li cas tungsten hlau tuaj yeem ua haujlwm nyob rau hauv cov teeb pom kev zoo thiab cov khoom siv hluav taws xob ntawm qhov kub thiab txias.