Dab tsi yog qhov resistivity ntawmtungsten hlau?
Lub resistivity ntawm tungsten hlau yog 5.3 * 10 ^ -8. Tungsten muaj lub siab melting point, siab resistivity, zoo zog, thiab tsawg vapor siab. Nws yog cov khoom siv zoo tshaj plaws ntawm tag nrho cov hlau ntshiab rau kev ua incandescent filaments. Txawm li cas los xij, tungsten yog ib qho nyuaj thiab nkig, ua rau nws nyuaj rau kev ua haujlwm.
Thaum tam sim no dhau los ntawm tungsten hlau thiab yog rhuab mus rau ib qho kub, qhov kev tiv thaiv tus nqi ntawm tungsten hlau nce mus rau ib qho nqi (feem ntau, tus nqi tsis kam ntawm cov hlau hlau nce raws li qhov kub thiab txias).
Qhov kev tiv thaiv ntawm cov khoom no ntawm qhov kub ib txwm yuav tsum yog 1370 degree -2000 degree, tab sis thaum qhov chaw hla qhov ntev ntawm tungsten hlau hloov, tus nqi kuj yuav hloov.
Nyob rau hauv 1909, Coolidge tau tsim lub tungsten filament processing thev naus laus zis, uas tau ua lub luag haujlwm txiav txim siab hauv kev tsim khoom thiab kev txhawb nqa ntawm qhov muag teeb. Nws cov ntsiab cai tseem ceeb tseem siv niaj hnub no.
