Tungsten hlau uas muaj thorium (thorium oxide: ThO2) cov khoom yog tsim rau ntau yam hluav taws xob cov raj, tiv thaiv kev vibration lub teeb filaments thiab TIG vuam electrodes. Alloying thorium txhim khu lub emission ntawm kub electrons los ntawm kev txo cov kev ua hauj lwm barrier. Vim hais tias thorium particles muaj cov nyhuv dispersing thiab ntxiv dag zog, cov khoom siv ntawm thorium tungsten hlau tau txhim kho thiab tsis yooj yim deformed, yog li lawv feem ntau siv los ua ion qhov chaw.
Thaum cov txheej txheem tungsten inert gas (TIG) yog siv rau arc vuam los yog plasma vuam, tungsten electrodes yog siv. Qhov sib ntxiv ntawm thorium oxide zoo heev txhim kho arc pib kev ua tau zoo, nce arc stability, thiab nce lub peev xwm nqa tam sim no ntawm cov electrode. Txo qhov kev pheej hmoo ntawm kev sib kis ntawm vuam thiab ua rau lub neej ntawm electrode. Thorium oxide tau siv ntau xyoo thiab tau pom tias muaj txiaj ntsig zoo ntawm lub neej ntev thiab thermal efficiency.
Thorium yog me ntsis xov tooj cua, muaj ib nrab-lub neej ntev, thiab emits feem ntau alpha hais, tab sis qee zaus qee cov beta thiab gamma tawg. Alpha hais tsis tuaj yeem nkag mus rau ntawm daim tawv nqaij lossis txawm tias daim ntawv. Txawm li cas los xij, lawv muaj kev phom sij thiab tuaj yeem ua cov carcinogens yog tias lawv tso rau hauv lub plab zom mov lossis lub ntsws. Yog li, thorium oxide yog cov khoom siv hluav taws xob tsawg. Txawm li cas los xij, rau cov xaim thoriated tungsten, qhov ntxiv ntawm thorium feem ntau yog 1% -4%, uas yuav ua rau muaj kev phom sij me ntsis rau sab nraud hluav taws xob. Tus nqi ntawm kev noj los yog nqus pa yog ib feem me me ntawm qhov siab tshaj plaws tso cai hluav taws xob ntawm tib neeg lub cev. Yog li ntawd, nws tau xaus lus tias hluav taws xob sab nraud yog Radiation hazards yog negligible.
