Crucibles yog ib qho tseem ceeb ntawm cov apparatatus thiab pab rau cov thawv rau melting thiab ua kom cov kua hlau thiab siv cov kua sib xyaw ua kua. Lawv tsim lub hauv paus rau kom ua kom cov tshuaj tiv thaiv du.
Crucibles tuaj yeem muab faib ua peb pawg tseem ceeb:Graphite shregles, Av nplaum crucailes, thiab hlau cruciles.
Graphite cross yog feem ntau ua los ntawm ntuj crystalline graphite, khaws cov khoom siv lub cev thiab tshuaj lom neeg ntawm lub ntuj graphite. Lawv muaj cov khoom zoo thermal zoo thiab kub ua hauj. Thaum lub sij hawm siab-kub siv, lawv nthuav tawm qis qis tsawg thermal nthuav tawm coefficients, ua rau lawv tiv taus cua sov thiab cua txias. Graphite cross muaj muaj zog corrosion tsis kam rau acidic thiab alkaline cov kev daws teeb meem thiab ua kom pom tau cov tshuaj ruaj khov.
Vim tias cov yam ntxwv zoo tshaj plaws, cov teeb meem yooj yim tau siv dav hauv kev lag luam xws li metallurgy, machinery, thiab tshuaj tshuab ua haujlwm. Lawv pom cov ntawv thov dav dav hauv smelting ntawm alloy tuam steels thiab lub jelting ntawm cov hlau tsis-ferrous thiab lawv cov alloys, muab cov txiaj ntsig kev lag luam.
Silicon carbide crucailes:
Silicon carbide crucailed yog lub tais-puab ceramic ntim. Thaum cov khib nyiab yuav tsum tau muab rhaub ntawm qhov kub thiab txias, crucibles yog qhov tsim nyog vim tias lawv tuaj yeem tiv thaiv kom muaj dua tshiab piv rau cov iav. Crucibles feem ntau tsis tau sau rau kev siv hluav taws xob kom tiv thaiv cov khoom cua sov los ntawm kev ua kom sov, cia cov cua kom muaj kev ywj pheej. Vim lawv lub hauv paus me me, cov crucibles feem ntau muab tso rau ntawm cov av nplaum daim duab peb sab rau cov cua kub ncaj. Lawv tuaj yeem yog qhov chaw sawv ntsug lossis ntawm lub kaum sab xis ntawm ib lub trindod hlau, nyob ntawm qhov yuav tsum tau sim. Tom qab cua sov, crucibles yuav tsum tsis txhob muab tam sim ntawd muab tso rau ntawm ib qho txias hlau saum npoo kom tsis txhob txias thiab muaj peev xwm tawg. Ib yam li ntawd, lawv yuav tsum tsis txhob muab tso ncaj qha rau ntawm cov ntoo saum npoo av kom tiv thaiv scorching lossis cov phom tua hluav taws. Txoj hauv kev kom yog yog tso cai rau tus ntoo khaub zig kom txias rau ib txwm nyob ntawm cov hlau travod lossis muab lawv tso rau ntawm Asbestos txias. Yuav tsum siv cov nplaig crucible yuav tsum tau siv rau kev tuav.
Platinum cruciles:
Platinum crucibles, ua los ntawm cov hlau platinum, ua rau cov khoom siv hluav taws xob tsis yog hlau, xws li iav fiber ntau lawm thiab cov iav kos.
Lawv yuav tsum tsis txhob chwv nrog:
Cov tebchaw zoo xws li K2O, NAXO, NANO3, NACN, NACN, NA2O2, BA (OH) 2, lioh, thiab lwm yam.
Aqua Regia, Halogen daws, lossis cov kev daws teeb meem ntawm kev tsim cov lus halogens.
Tebchaw ntawm cov khoom siv hluav taws xob yooj yim thiab cov hlau lawv tus kheej.
Cov pa roj carbon uas muaj cov pob zeb uas ntsiag to, phosphorus, arsenic, leej faj, thiab lawv cov tebchaw.
Nickel cruciles:
Yuav tsum tsis txhob ua tus loj dua 700 degree crucible yuav tsum tsis pub tshaj 700 degrees Celsius kom tiv thaiv oxidation thaum kub.
Nickel crucibles yog cov tshuaj ua kom muaj zog thiab corrosion, ua rau lawv haum rau melting hlau alloys, slag, av nplaum, thiab lwm yam. Nickel crucibles tau tshaj alkaline fluxes xws li NHOHH, NAHO2, K2S2O7, lossis NA2S2O7 thiab Sulfide Fluxes nrog Sulphur. Cov ntsev melting ntawm txhuas, zinc, zinc, cov hmoov txhuas, tin, thiab mercury tuaj yeem muab cov npib tsib loj cruciles cruciles nkig. Nickel crucibles yuav tsum tsis txhob siv rau hlawv cov nag, thiab borax yuav tsum tsis tau melted nyob rau hauv lawv.
Nickel crucibles feem ntau muaj cov nqi ntawm chromium, yog li ceev faj yuav tsum tau siv thaum, kev sib cuam tshuam.
Lub sijhawm Post: Jun-18-2023