Graphite crucibleyog cov khoom lag luam tshwj xeeb uas ua lub luag haujlwm tseem ceeb hauv kev kho kom zoo dua txheej txheem kub, nyiaj, tooj thiab lwm yam me me. Txawm hais tias ntau tus neeg yuav tsis paub txog nws, kev tsim cov txheej txheem crucite cuam tshuam rau cov qib siab ua kom ntseeg tau tias yog lub zog kawg ntawm cov khoom kawg. Hauv tsab xov xwm no, peb yuav delve rau hauv cov ntsiab lus ntawm txhua theem koom nrog hauv graphite crucible tsim cov txheej txheem.
Thawj theem ntawm kev ua graphite cruciles koom nrog kev ua kom qhuav. Tom qab crucible thiab nws cov kev txhawb nqa pendant seem yog tsim, lawv tau soj ntsuam raws li cov qauv khoom tiav. Daim tshev no kuaj xyuas kom ntseeg tau tias tsuas yog cov neeg tsim nyog ua ntej kom ua ntej. Tom qab xaiv, lawv yauv mus rau ib txheej txheem glazing, uas cov npoo ntoo crucible yog coated nrog lub ntsej muag ci. Qhov ci ci no txheej ua haujlwm ntau lub hom phiaj, suav nrog kev nce ntom ntom ntom ntom ntom thiab cov tshuab ua kom zoo nkauj ntawm tus ntoo khaub zig, txhim kho nws cov khoom zoo tag nrho.
Lub kauj ruam hluav taws xob yog qhov tseem ceeb ntawm kev tsim khoom lag luam. Nws cuam tshuam nrog kev kawm graphite crucite crucible rau qhov kub nyob rau hauv ib kiln, yog li nthuav tawm cov qauv ntawm tus ntoo khaub zig. Tus txheej txheem no yog qhov tseem ceeb heev los xyuas kom lub durability thiab kev ntseeg tau ntawm tus ntoo khaub zig thaum lub sijhawm ua kom zoo dua qub. Lub firciple cuam tshuam tau tuaj yeem faib ua plaub cov theem sib txawv kom nkag siab qhov kev hloov pauv uas tshwm sim hauv cov txheej txheem crucued thaum cov txheej txheem no.
Thawj theem yog lub preheering theem, thiab qhov ntsuas kub nyob hauv Kiln yog tswj hwm ntawm 100 txog 300 ° C. Nyob rau theem no, cov dej noo seem nyob hauv Crucible yog maj mam muab tshem tawm. Qhib lub Kiln txoj kev skylight thiab qeeb cov cua sov kom tiv thaiv viav vias. Kev tswj qhov kub thiab txias yog qhov tseem ceeb ntawm qib no, raws li muaj ntau cov dej noo ntau dhau tuaj yeem ua rau cov ntoo khaub zig lossis txawm tawg.
Qhov thib ob theem yog qhov tsawg-kub tua kab, nrog ib tug kub ntawm 400 txog 600 ° C. Raws li Kiln txuas ntxiv ua kom sov, cov dej ua txhua yam hauv cov crucible pib tawg thiab evaporate. Lub ntsiab Cheebtsam A12O3 thiab Sio2, uas tau ua yav dhau los ua rau cov av nplaum, pib muaj nyob hauv lub xeev pub dawb. Txawm li cas los xij, nws yuav tsum tau sau tseg tias txheej ci ci rau saum npoo ntawm crucible tsis tau melted tsis tau. Txhawm rau tiv thaiv ib qho kev xav tsis thoob, cov cua cua kub yuav tsum tseem qeeb thiab khov kho. Cov cua sov sai thiab tsis pom kev tuaj yeem ua rau cov ntoo khaub zig crucible rau tawg lossis vau, cuam tshuam nws txoj kev ncaj ncees.
Nkag mus rau theem peb, qhov nruab nrab kub tua hluav taws xob feem ntau tshwm sim ntawm 700 thiab 900 ° C. Nyob rau theem no, amorphous al2o3 hauv av nplaum yog ib nrab hloov los ua y-hom crystalline al2o3. Qhov kev hloov pauv no ntxiv kom tau zoo ntxiv rau cov qauv kev ncaj ncees ntawm tus ntoo khaub zig. Nws yog qhov tseem ceeb los tswj cov kev tswj qhov kub thiab txias thaum lub sijhawm no kom tsis txhob muaj cov txiaj ntsig xav tau.
Cov theem kawg yog qhov kev kub kub-kub tua hluav taws, nrog qhov kub tshaj 1000 ° C. Txij ntawm no, lub ntsej muag ci ntsa iab thaum kawg melts, kom ua rau lub ntsej muag crucible yog tus thiab kaw. Ntau dua kub kuj tseem pab txhawb kev txhim kho tag nrho hauv cov crucible ntawm cov tshuab hluav taws xob muaj zog thiab kav ntev.
Tag nrho cov hauv txhua qhov, cov txheej txheem ntau lawm ntawm graphite crucles cuam tshuam nrog ntau theem me me. Los ntawm kom qhuav thiab tshawb xyuas cov khoom tiav ib nrab ua tiav rau glazing thiab hluav taws kub, txhua kauj ruam yog qhov tseem ceeb los ua kom muaj kev zoo thiab kev ntseeg tau zoo kawg grucite crucite. Ua raws li kev ntsuas kub tswj kev ntsuas kub thiab kev tswj hwm kom raug cov pa hluav taws kub yog qhov tseem ceeb los tiv thaiv qee yam tsis xws luag lossis xwm txheej. Qhov kawg tshwm sim yog qhov zoo-zoo graphite crucable uas tuaj yeem tiv taus cov txheej txheem kom nruj ntawm cov khoom siv hlau.
Lub sijhawm Post: NOV-29-2023