Nickel{0}}Chromium (Ni-Cr) Alloy:Ib qho ntawm cov khoom siv feem ntau siv rau cov khoom cua sov. Nickel-chromium alloys tau txais txiaj ntsig zoo rau lawv cov ductility, siab tiv taus, thiab oxidation kuj zoo heev txawm nyob rau qhov kub thiab txias. Nws feem ntau yog tsim los ntawm 80% nickel thiab 20% chromium.
Hlau -chromium- aluminium alloy:Feem ntau paub nyob rau hauv lub npe ntawm Kanthal, ferritic hlau -chromium- txhuas alloys feem ntau yog tsim los ntawm cov nram qab no Cheebtsam: 20% mus rau 24% chromium, 4% mus rau 6% txhuas, thiab cov seem seem yog sau nrog hlau. Piv rau npib tsib xee-chromium alloys, cov alloys no nyiam vim lawv qhov yooj thiab qis dua.
Molybdenum disilicide: A refractory hlau ceramic (ceramic-cov khoom siv hlau sib xyaw), molybdenum disilicide feem ntau yog siv los ua cov khoom siv cua sov. Vim nws qhov siab melting point thiab zoo heev corrosion kuj, nws yog heev haum rau high - kub furnaces. Molybdenum disilicide cua sov cov ntsiab lus yog tsim los ntawm ntau lub zog- txoj kev siv zog, suav nrog kev sib xyaw ua ke, kev sib txuas ua ke, cuam tshuam kev sib txuas, thiab kub isostatic nias. Lawv qhov kub thiab txias tuaj yeem ncav cuag 1,900 degree. Txawm li cas los xij, lawv muaj qhov tsis zoo xws li tsis tshua muaj zog ntawm qhov kub thiab txias ntawm qhov kub thiab txias rau siab -kub creep. Nyob rau hauv chav tsev kub, molybdenum disilicide yog nkig heev thiab yuav tsum tau ceev faj tuav.
Silicon Carbide cua sov cov ntsiab lus, lawv yog ua los ntawm ceramics, uas yog tsim los ntawm recrystallization los yog cov tshuaj tiv thaiv ntawm kub siab tshaj 2,100℃los muab SiC nplej. Cov ntsiab lus no feem ntau yog ntxeem tau (8-25%) thiab tso cai rau cov cua hauv qhov cub kom cuam tshuam nrog cov khoom. Sij hawm dhau mus, cov khoom cua sov tuaj yeem maj mam oxidize, uas yuav ua rau lawv tsis kam thaum lub sij hawm hu ua "aging." Txhawm rau kom muaj lub zog ruaj khov, cov khoom siv hluav taws xob sib txawv ntawm cov khoom siv hluav taws xob feem ntau yog siv los maj mam nce qhov voltage raws li lub hnub nyoog. Cov txheej txheem kev laus no nws thiaj li txwv txoj sia thiab kev ua haujlwm ntawm cov cua sov.
Graphite, ib qho ntxhia tsim los ntawm cov pa roj carbon nrog lub hexagonal atomic qauv, uas yog ib qho zoo heev conductor ntawm tshav kub thiab hluav taws xob. Nws tuaj yeem tsim cov cua sov ntawm qhov kub siab tshaj 2,000 degree. Thaum qhov kub thiab txias, nws qhov kev tiv thaiv nce ntxiv. Nws tuaj yeem tiv taus thermal shock zoo thiab tswj elasticity yam tsis muaj nkig thaum lub sij hawm cua sov thiab cua txias.
Thaum siv los ua cov khoom cua sov, cov hlau refractoryxws li tungsten thiab molybdenum nthuav tawm cov khoom zoo ib yam li graphite. Tungsten tuaj yeem ua haujlwm ntawm qhov kub siab tshaj plaws tab sis kuj tseem kim tshaj plaws. Molybdenum, ntawm qhov tod tes, tsis tshua muaj nqi thiab siv ntau dua, thiab tseem kim dua li graphite. Zoo li graphite, cov hlau no yuav tsum tau siv nyob rau hauv lub tshuab nqus tsev vim tias lawv muaj kev sib raug zoo rau cov pa oxygen.
Cov khoom zoo kub coefficient:Cov khoom siv PTC xws li roj hmab thiab ceramics. PTC roj hmab feem ntau yog tsim los ntawm polydimethylsiloxane (PDMS) thiab carbon nanoparticles ntxiv. Cov yam ntxwv ntawm PTC cov cua sov yog tias lawv tuaj yeem tswj tau qhov tam sim no los ntawm kev ua kom tsis muaj zog thaum kub nce.
