Crucibles yog cov khoom tseem ceeb ntawm cov cuab yeej siv tshuaj thiab ua cov ntim rau melting thiab refining hlau cov kua, nrog rau cov cua sov thiab reacting khoom-kua sib tov.Lawv tsim lub hauv paus rau kev ua kom cov tshuaj lom neeg zoo.
Crucibles tuaj yeem muab faib ua peb pawg loj:graphite crucibles, av nplaum crucibles, thiab hlau crucibles.
Graphite crucibles feem ntau yog tsim los ntawm ntuj crystalline graphite, khaws ntau lub cev thiab tshuaj lom neeg ntawm ntuj graphite.Lawv muaj cov thermal conductivity zoo thiab kub tsis kam.Thaum siv qhov kub thiab txias, lawv pom cov thermal expansion coefficients tsawg, ua rau lawv tiv taus cua sov thiab cua txias.Graphite crucibles muaj zog corrosion kuj rau acidic thiab alkaline daws thiab ua kom pom kev ruaj ntseg tshuaj zoo heev.
Vim cov yam ntxwv zoo tshaj no, graphite crucibles tau siv dav hauv kev lag luam xws li metallurgy, casting, machinery, thiab chemical engineering.Lawv pom ntau daim ntawv thov nyob rau hauv smelting ntawm alloy cuab yeej steels thiab melting ntawm non-ferrous hlau thiab lawv cov alloys, muab cov txiaj ntsig zoo thiab kev lag luam.
Silicon Carbide Crucibles:
Silicon carbide crucibles yog lub tais zoo li lub thawv ntim khoom.Thaum cov khib nyiab yuav tsum tau rhuab ntawm qhov kub siab, crucibles yog qhov tsim nyog vim tias lawv tuaj yeem tiv taus qhov kub siab dua piv rau iav.Crucibles feem ntau tsis muaj peev xwm ua kom muaj peev xwm thaum siv los tiv thaiv cov khoom siv hluav taws xob los ntawm kev nchuav, tso cai rau huab cua nkag mus thiab pab txhawb kev oxidation tshwm sim.Vim lawv lub hauv paus me me, crucibles feem ntau muab tso rau ntawm daim duab peb sab av nplaum rau cov cua sov ncaj qha.Lawv tuaj yeem muab tso ncaj ncaj los yog ntawm lub kaum sab xis ntawm lub taub hau hlau, nyob ntawm qhov xav tau ntawm kev sim.Tom qab cua sov, crucibles yuav tsum tsis txhob muab tso rau tam sim ntawd rau ntawm ib tug txias hlau nto kom tsis txhob txias sai thiab tej zaum yuav tawg.Ib yam li ntawd, lawv yuav tsum tsis txhob muab tso ncaj qha rau ntawm qhov chaw ntoo kom tiv thaiv kev kub ntxhov lossis hluav taws kub.Txoj hauv kev kom raug yog tso cai rau cov crucibles kom txias ib txwm nyob ntawm cov hlau tripod lossis muab tso rau ntawm asbestos net rau maj mam txias.Crucible tongs yuav tsum tau siv los tuav.
Platinum Crucibles:
Platinum crucibles, ua los ntawm cov hlau platinum, ua cov khoom seem rau qhov sib txawv thermal analyzers thiab yog siv rau cov khoom siv cua sov uas tsis yog xim hlau, xws li iav fiber ntau thiab iav kos duab.
Lawv yuav tsum tsis txhob ntsib nrog:
Cov khoom sib xyaw xws li K2O, Na2O, KNO3, NaNO3, KCN, NaCN, Na2O2, Ba(OH)2, LiOH, thiab lwm yam.
Aqua regia, halogen daws, lossis cov kev daws teeb meem muaj peev xwm tsim cov halogens.
Qhov sib xyaw ntawm cov hlau yooj yim txo qis thiab cov hlau lawv tus kheej.
Carbon-muaj silicates, phosphorus, arsenic, sulfur, thiab lawv cov tebchaw.
Nickel Crucibles:
Lub melting point ntawm npib tsib xee yog 1455 degrees Celsius, thiab qhov kub ntawm cov qauv nyob rau hauv ib tug npib tsib xee crucible yuav tsum tsis txhob ntau tshaj 700 degrees Celsius los tiv thaiv oxidation ntawm high kub.
Nickel crucibles yog cov resistant rau alkaline tshuaj thiab corrosion, ua rau lawv haum rau melting hlau alloys, slag, av nplaum, cov ntaub ntawv refractory, thiab lwm yam.Nickel crucibles yog sib xws nrog alkaline fluxes xws li NaOH, Na2O2, NaCO3, thiab cov uas muaj KNO3, tab sis lawv yuav tsum tsis txhob siv nrog KHSO4, NaHSO4, K2S2O7, los yog Na2S2O7 thiab sulfide fluxes nrog sulfur.Melting ntsev ntawm txhuas, zinc, txhuas, tin, thiab mercury tuaj yeem ua rau nickel crucibles nkig.Nickel crucibles yuav tsum tsis txhob siv rau hlawv precipitates, thiab borax yuav tsum tsis txhob melted nyob rau hauv lawv.
Nickel crucibles feem ntau muaj cov lej ntawm chromium, yog li ceev faj yuav tsum tau siv thaum, kev sib tham cuam tshuam.
Post lub sij hawm: Jun-18-2023