Cov ntaub ntawv yaj tuaj yeem muab faib ua cov ntaub ntawv ntshiab hlau yaj; Eutectic low melting point alloy melt khoom; High resistivity alloy yaj cov ntaub ntawv xws li npib tsib xee chromium hlau, tooj liab hlau thiab puas cov ntaub ntawv xws li nyiaj - tooj liab puas daim kab xev.
Tsawg nyiaj
Nyiaj yog cov khoom siv yaj zoo tshaj plaws, nws muaj kev ua haujlwm siab thiab thermal conductivity, cov yaj ua nrog nws muaj cov cua kub zoo rau cov cuab yeej sib cuag, yog li nyob rau hauv ib txwm ua haujlwm, qhov kub ntawm lub fuse yog qis, uas ua rau nws yooj yim rau kev tsim fuses uas muaj kev cuam tshuam rau luv luv Circuit Court tam sim no (fast fuse). Silver kuj muaj lub zog zoo creep thiab qaug zog, yog li nyiaj yaj lub neej ntev. Cov nyiaj kuj oxidizes ntawm qhov kub thiab txias, tab sis nws cov oxide zaj duab xis muaj ib tug siab conductivity thiab decomposed rau hauv cov nyiaj ntshiab ntawm qhov kub siab tshaj 180 degree. Kev ntsuam xyuas qhia tau hais tias qhov kub siab tshaj plaws ntawm cov nyiaj yaj tuaj yeem ncav cuag 500 degree.
Tsis tas li ntawd, nyiaj kuj muaj kev ua haujlwm zoo thiab yooj yim rau precision stamping. Cov yaj ua nrog nws muaj qhov zoo qhov tseeb, yog li cov yam ntxwv ntawm lub fuse muaj qhov sib txawv me ntsis. Feem ntau, siab - zoo thiab siab - cov khoom siv precision siv cov khoom siv nyiaj ua yaj. Nyob rau hauv cov txheej txheem ntawm cua sov, nyiaj tuaj yeem tsim eutectic nrog rau lwm yam hlau yam tsis muaj kev puas tsuaj rau nws qhov kev ruaj ntseg, yog li kev sib txuas ntawm cov nyiaj thiab kev sib cuag riam lossis cov phaj conductive yog qhov zoo, thiab kev sib raug zoo ntawm cov nyiaj thiab quartz xuab zeb yog qhov zoo. Nyob rau hauv cov nqe lus ntawm kev ua tau zoo, nyiaj yog qhov tsim nyog tshaj cov khoom siv yaj, tab sis nws yog cov hlau muaj txiaj ntsig, tus nqi yog kim, thiab tsis muaj peev txheej nyiaj yog qhov teeb meem thoob ntiaj teb.
Raws li lub koom haum German ntawm Geology thiab United States Department of Mining kev lag luam, cov nyiaj ntawm cov nyiaj nyob rau hauv Western ntiaj teb no yuav kav tsis ntev tshaj 30 xyoo nyob rau hauv tam sim no noj theem. Cov peev nyiaj txiag kuj tsis tshua muaj nyob hauv Suav teb. Txij li thaum xyoo 1970s lig, kev tshawb fawb tau ua tiav ntawm kev siv txhuas es tsis txhob siv nyiaj kom txuag nyiaj hauv kev lag luam fuse. Tam sim no, txhuas lossis nyiaj- cov khoom siv tooj liab tau maj mam siv los ntawm cov nyiaj los ua cov khoom yaj.
Tsawg tooj
tooj liab nrog cov nyiaj zoo sib xws ntawm lub cev, yog siv dav hauv cov khoom siv yaj, tab sis tooj liab yaj yooj yim oxidized nyob rau hauv cov huab cua, thiab cov oxide zaj duab xis tsis yog conductive, thermal stress thiab mechanical stress yuav rhuav tshem cov oxide zaj duab xis, tab sis ib zaug lub qub oxide zaj duab xis tawg los yog spalling, tshiab oxide zaj duab xis yog generated, thiab ua rau hnyav corrosion, yog li cov kev pab cuam lub neej ntawm tooj liab yaj yog ntau npaum li cas tsawg dua cov nyiaj. Qhov thib ob, tooj liab yaj yog tshwj xeeb tshaj yog rhiab heev rau lub sij hawm hloov nyob rau hauv lub load, nyob rau hauv lub rov qab load tam sim no, cov tooj liab yaj mus rau yaj nyob rau hauv ib tug luv luv lub sij hawm ntau tshaj li nws yuav tas mus li qub tam sim no. Yog tias cov tooj liab yaj tau muab tso rau hauv quartz xuab zeb, qhov xwm txheej tau zoo dua me ntsis vim tias qhov kub thiab txias ntawm cov yaj yuav zoo ib yam.
Raws li kev kho deg sib txawv ntawm cov txheej txheem ntawm tooj liab yaj hauv ntau qhov kub (650℃thiab qis dua) oxidation ntawm kev tshawb fawb, xav nrog nyiaj plating txoj kev kuj tsis tuaj yeem tiv thaiv tooj liab yaj los ntawm oxidation corrosion, thiab tooj liab thermoelectric tas li yog qhov loj dua, yog li cov tooj liab tsis zoo rau cov fuse melts, tab sis bronze kab thiab cov khoom siv hluav taws xob tiv thaiv kev tiv thaiv copper yog pheej yig dua. 1/50), thiab tooj liab kuj muaj kev ua tiav zoo thiab kev ua haujlwm zoo thiab thermal conductivity, kev siv cov ntsiab lus qis melting alloy nyob rau hauv qhov chaw tsim nyog ntawm cov yaj tuaj yeem daws qhov teeb meem ntawm cov khoom siv tooj liab siab.