Dab tsi yog cov khoom cua sov ntawm muffle furnace?

Cov khoom cua sov ntawm lub tshuab hluav taws xob muaj xws li hluav taws xob rau hluav taws xob, silicon carbide rods, thiab silicon molybdenum rods.

Electric qhov cub hlau:

Lub tshuab hluav taws xob hluav taws xob yog ua los ntawm hlau-chromium-aluminium thiab nickel-chromium hluav taws xob cua sov hlau hlau. Lub zog ntawm lub cub hluav taws xob hlau yog tswj los ntawm lub computer, thiab nws raug mob los ntawm lub tshuab cua kub ceev tsis siv neeg. Nws feem ntau suav nrog hlau-chromium-aluminium alloy hluav taws xob rauv xov hlau thiab npib tsib xee-chromium alloy hluav taws xob rauv hlau. Lub qub yog cov khoom siv hlau nrog cov qauv ferrite, thiab tom kawg yog cov khoom siv hlau nrog cov qauv austenite. Ob qho tib si chromium-aluminium alloy hluav taws xob rauv hlau thiab cov nickel-chromium alloy hluav taws xob rauv hlau muaj cov ntsiab lus melting hauv qab 1400 ℃, thiab lawv feem ntau yog kub heev (kub lub xeev) nyob rau hauv kev ua hauj lwm tej yam kev mob, thiab lawv yog nquag oxidation cov tshuaj tiv thaiv. nyob rau hauv cov huab cua thiab hlawv Disadvantages.

Silicon carbide pas nrig:

Silicon carbide rods yog pas nrig-puab thiab tubular non-metallic high-temperature hluav taws xob cua sov ntsiab ua los ntawm high-purity ntsuab hexagonal silicon carbide raws li lub ntsiab raw khoom. Nyob rau hauv ib qho chaw oxidizing, qhov kev siv ib txwm kub tuaj yeem ncav cuag 1450 ℃, thiab kev siv tas mus li tuaj yeem ncav cuag 2000 teev. Silicon carbide rods yog ib qho nyuaj thiab nkig, tiv taus kom txias thiab kub ceev, tsis yooj yim deformed ntawm qhov kub thiab txias, thiab siv rau qhov kub thiab txias. Lawv muaj cov yam ntxwv ntawm qhov kub thiab txias tsis kam, oxidation tsis kam, corrosion kuj, ceev kub nce, lub neej ntev, me me kub kub deformation, yooj yim installation thiab txij nkawm, thiab lwm yam, thiab lawv yog cov zoo tshuaj stability.

Txawm li cas los xij, cov khoom siv silicon carbide tuaj yeem muaj cov teebmeem hauv qab no nrog cov pa oxygen thiab dej vapor thaum siv rau lub sijhawm ntev tshaj 1000 ℃:

①Sic+2O2→Sio2+CO2 ②Sic+4H2O=Sio2+4H2+CO2

Yog li ntawd, SiO2 cov ntsiab lus nyob rau hauv lub caij maj mam nce, thiab cov kuj nce qeeb, uas yog aging. Yog tias cov dej vapor ntau dhau, nws yuav txhawb nqa oxidation ntawm SiC. H2 ua los ntawm cov tshuaj tiv thaiv ntawm cov mis ② ua ke nrog O2 nyob rau hauv cov huab cua thiab ces reacts nrog H2O los ua ib tug vicious vajvoog. Txo cov khoom siv lub neej. Hydrogen (H2) tuaj yeem txo cov neeg kho tshuab lub zog ntawm cov khoom. Nitrogen (N2) qis dua 1200 ° C tuaj yeem tiv thaiv SiC los ntawm oxidizing thiab reacting nrog SiC saum 1350 ° C, yog li SiC tuaj yeem decomposed los ntawm chlorine (Cl2) thiab Sic tuaj yeem decomposed tag nrho.

Silicon molybdenum pas nrig:

Silicon molybdenum rods feem ntau tuaj yeem siv rau ntawm qhov cub kub ntawm 1600 ° C-1750 ° C. Lawv tau siv dav hauv metallurgy, iav, ceramics, cov khoom sib nqus, cov ntaub ntawv refractory, muaju, cov khoom siv hluav taws xob, kev tsim hluav taws xob thiab lwm yam. Lawv yog siv rau high-temperature sintering ntawm cov khoom * Lub zoo tagnrho cua sov caij.

Lub silicon molybdenum pas nrig yog raug rau ib tug high-kub oxidizing cua, thiab ib tug quartz tiv thaiv txheej yog tsim nyob rau saum npoo los tiv thaiv lub silicon molybdenum pas nrig los ntawm txuas mus rau oxidize. Thaum cov khoom kub siab tshaj 1700 ° C, quartz tiv thaiv txheej melts, thiab cov khoom siv txuas ntxiv mus rau hauv qhov chaw oxidizing, thiab quartz tiv thaiv txheej yog rov tsim dua. Silicon molybdenum rods yuav tsum tsis txhob siv rau lub sij hawm ntev nyob rau hauv thaj tsam ntawm 400-700 ℃, txwv tsis pub cov khoom yuav raug hmoov vim muaj zog oxidation ntawm qhov kub thiab txias.