Muaj qhov sib txawv tseem ceeb ntawmsilicon carbide cruciblesthiab graphite crucibles nyob rau hauv ntau yam xws li cov ntaub ntawv, txheej txheem, kev ua tau zoo, thiab tus nqi. Cov kev sib txawv no tsis tsuas yog cuam tshuam rau nws cov txheej txheem tsim khoom, tab sis kuj txiav txim siab nws cov txiaj ntsig thiab kev siv cov xwm txheej.
sib txawv heev
Graphite crucibles feem ntau yog ua los ntawm ntuj flake graphite thiab siv cov av nplaum ua cov ntawv khi. Qhov kev sib xyaw ua ke no muab cov graphite crucible zoo thermal conductivity thiab kub tsis kam, ua rau nws tsim nyog rau kev siv hauv cov txheej txheem kub kub. Cov qauv tshwj xeeb thiab siab thermal conductivity ntawm ntuj flake graphite ua graphite crucibles nrov heev hauv metallurgical thiab foundry industries.
Silicon carbide crucible yog raws li ntuj flake graphite, nrog silicon carbide ua lub ntsiab tivthaiv thiab kub-kub resin raws li cov ntaub ntawv. Raws li cov khoom siv superhard, silicon carbide muaj qhov hnav tsis kam thiab thermal stability, tso cai rau silicon carbide crucibles siv nyob rau hauv ntau qhov chaw hnyav. Kev siv cov khoom kub kub kuj tseem txhim kho lub crucible tag nrho lub zog thiab kav ntev.
Txheej txheem sib txawv
Kev tsim cov txheej txheem ntawm graphite crucible feem ntau yog nyob ntawm phau ntawv thiab tshuab nias. Cov graphite crucibles me me feem ntau yog tsim los ntawm cov neeg kho tshuab nias, ces sintered nyob rau hauv ib lub qhov cub ntawm qhov kub ntawm 1,000 degrees, thiab thaum kawg coated nrog anti-corrosion glaze los yog noo noo-pov thawj xim kom durability thiab corrosion kuj. Cov txheej txheem niaj hnub no, thaum tus nqi tsim nyog, muaj kev txwv ntawm kev tsim khoom thiab kev ua haujlwm zoo.
Kev tsim cov txheej txheem ntawm silicon carbide crucible yog qhov siab heev, siv cov khoom siv isostatic nias thiab cov qauv kev tshawb fawb. Isostatic nias tshuab siv lub siab tsis sib xws (txog 150 MPa), uas ua rau muaj qhov ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom. Cov txheej txheem no tsis tsuas yog txhim kho lub crucible lub zog txhua yam, tab sis kuj tseem txhim kho nws txoj kev tiv thaiv thermal shock thiab corrosion.
Kev ua tau zoo sib txawv
Hais txog kev ua tau zoo, muaj qhov sib txawv tseem ceeb ntawm graphite crucibles thiab silicon carbide crucibles. Graphite crucibles muaj qhov ntom ntawm 13 kA / cm², thaum silicon carbide crucibles muaj qhov ntom ntawm 1.7 txog 26 kA / mm². Lub neej kev pab cuam ntawm graphite crucibles feem ntau yog 3-5 npaug ntawm silicon carbide crucibles, uas yog vim cov khoom siv zog thiab corrosion kuj ntawm silicon carbide crucibles.
Tsis tas li ntawd, qhov sib txawv ntawm qhov kub ntawm sab hauv thiab sab nraud ntawm graphite crucible yog li 35 degrees, thaum qhov kub ntawm qhov sib txawv ntawm silicon carbide crucible tsuas yog 2-5 degrees, ua rau silicon carbide crucible zoo dua nyob rau hauv cov nqe lus ntawm kev tswj kub thiab thermal. ruaj khov. Cov kua qaub thiab alkali tsis kam thiab corrosion tsis kam ntawm silicon carbide crucibles kuj tseem nyob deb dua li cov graphite crucibles, uas ua rau lub zog ua haujlwm tau zoo thiab txuag tau li 50% lub zog dua li graphite crucibles.
qhov sib txawv ntawm tus nqi
Vim qhov sib txawv ntawm cov ntaub ntawv thiab cov txheej txheem tsim khoom, graphite crucibles thiab silicon carbide crucibles kuj muaj qhov sib txawv ntawm tus nqi tseem ceeb. Feem ntau, silicon carbide crucibles yog kwv yees li peb zaug kim dua li graphite crucibles. Qhov sib txawv ntawm tus nqi no qhia txog qhov zoo ntawm silicon carbide crucibles nyob rau hauv cov nqe lus ntawm cov khoom siv nqi, kev tsim cov txheej txheem complexity thiab kev ua tau zoo.
Hauv cov ntsiab lus, txawm hais tias silicon carbide crucibles raug nqi ntau dua, lawv cov kev ua haujlwm zoo dua, kev tiv thaiv corrosion, thiab lub zog ua haujlwm ua rau lawv xaiv tus nqi ntau dua rau ntau daim ntawv thov. Graphite crucibles tseem siv dav hauv ntau daim ntawv sau npe vim lawv cov nqi qis thiab cov khoom siv zoo. Qhov zoo thiab qhov tsis zoo ntawm ob lub crucibles no txiav txim siab tias lawv tsim nyog rau cov xwm txheej sib txawv.
Post lub sij hawm: Jun-13-2024