Yuav ua li cas high-purity hlau txhim khu qhov tseeb ntawm qhov ntsuas kub?

High-purity hlau muab ntau cov txiaj ntsig uas tuaj yeem kho qhov tseeb ntawm qhov ntsuas kub, tshwj xeeb tshaj yog thaum siv nrog sab thermocouples.
High-purity hlau muaj yam tsawg kawg nkaus impurities. Cov yam ntxwv no tseem ceeb heev vim tias impurities tuaj yeem cuam tshuam rau lub tsev hluav taws xob ntawm cov hlau thiab yog li cuam tshuam qhov ntsuas qhov ntsuas qhov tseeb. Nyob rau hauv ib lub thermocouple, 2 cov hlau tshwj xeeb tsim qhov voltage qhov no yog proportional rau qhov kub qhov sib txawv. High-purity hlau ua kom muaj kev ruaj khov thiab kev ntseeg tau hluav taws xob ntxiv, qhov tseem ceeb rau kev nyeem ntawv kub ntxiv.
Cov hlau no feem ntau qhia cov thermal conductivity ntau dua. Thaum siv nyob rau hauv lub thermocouple sheath los yog ua ib feem ntawm cov thermocouple hlws ris, cov hlau purity ntau dhau tuaj yeem ua kom nrawm thiab ua kom sov. Qhov no tso cai rau cov tshuaj tiv thaiv sai ntxiv rau qhov hloov pauv kub, tso cai rau lub thermocouple muab sijhawm zoo thiab ntsuas qhov tseeb.
High-purity hlau kuj tseem muaj zog ntxiv rau lub sijhawm. Lawv muaj peev xwm tsawg dua los ntawm cov tshuaj lom neeg los yog kev puas tsuaj ntawm qhov kub thiab txias. Hauv kev teeb tsa thermocouple, qhov nyiaj tshuav no tau lees paub tias cov tsev ntawm cov hlau tseem nyob ruaj khov, ua kom muaj kev ntsuas kub ruaj khov thiab raug nyob rau hauv chav kawm ntawm lub neej ntawm cov khoom siv.
Lwm qhov txiaj ntsig yog lawv tsis kam oxidation. Thaum kub ntau dhau, ntau cov hlau tuaj yeem oxidize, uas tuaj yeem tswj lawv lub tsev hluav taws xob thiab thermal. High-purity hlau yog feem ntau ntxiv pov thawj tiv thaiv oxidation, khaws cia lawv kev ncaj ncees thiab raug nyob rau hauv ntau-kub ib puag ncig. Qhov no yog qhov tseem ceeb tshaj plaws rau cov thermocouples uas tsis tau npog rau qhov kub thiab txias rau lub sijhawm ntev.