Tungsten thiab nws cov alloys tau siv dav hauv kev lag luam hluav taws xob thiab hluav taws xob teeb pom kev lag luam. Siv los tsim ntau yam teeb pom kev zoo, raj filaments siv doped tungsten hlau nrog droop tsis kam.
Doped tungsten filament nrog rhenium. Thermocouple ua los ntawm cov ntsiab lus tsis tshua muaj rhenium tungsten rhenium alloy hlau thiab siab rhenium cov ntsiab lus tungsten rhenium alloy hlau nrog qhov ntsuas kub ntau ({0}} ~ 2500 degree C), zoo linear kev sib raug zoo ntawm kub thiab thermoelectric quab yuam, ceev kub cov tshuaj tiv thaiv (3 vib nas this), kuj pheej yig, yog ib tug zoo dua thermocouple ntsuas nyob rau hauv ib tug hydrogen cua.
tungsten pas nrig yog tsim los ntawm cov hmoov hlau refining ntawm qhov kub thiab txias, vim hais tias cov thermal expansion coefficient ntawm tungsten alloy cov ntaub ntawv yog cov thermal conductivity tsawg dua. Tungsten alloy cov ntsiab lus tuaj yeem tsim los txhim kho machining toughness thiab vuam. Nws yog ib qho khoom siv dav siv hauv kev lag luam. Vim tias tus pas nrig tungsten muaj nws cov khoom tshwj xeeb, tsis tshua muaj thermal expansion thiab muaj zog heev. Yog li ntawd, tungsten rods yog zoo siv nyob rau hauv ntau yam lag luam. Peb cov kab ntshuam niaj hnub no, lub tshuab luam ntawv pins thiab ntau yam electrodes thiab quartz furnaces kuj ua haujlwm zoo ntawm cov khoom siv tsheb.
