Yuav ua li cas yog Silicon Carbide Manufactured
Silicon carbide (SiC)yog ib qho sib xyaw ntawm silicon thiab carbon. Nws yog lub npe hu rau nws hardness, lub zog, thiab kuj rau hnav thiab corrosion. SiC tuaj yeem pom nyob rau hauv ntau hom, xws li crystalline mus rau amorphous, thiab feem ntau siv hauv kev lag luam xws li semiconductors, refractories, thiab abrasives. Tab sis SiC tsim tau raws nraim li cas?
Muaj ntau txoj hauv kev rau kev sib txuas ntawm SiC, suav nrog cov txheej txheem Acheson, txheej txheem Lely, thiab cov txheej txheem Lely hloov. Cov txheej txheem Acheson, uas tau tsim los ntawm Edward Acheson hauv xyoo 1891, yog txoj kev qub tshaj plaws thiab feem ntau siv rau SiC ntau lawm. Nws koom nrog cov tshuaj tiv thaiv ntawm silica (SiO2) thiab carbon, uas yog rhuab mus rau qhov kub thiab txias hauv lub cub hluav taws xob. Cov tshuaj tiv thaiv ua rau kev tsim ntawm SiC, nrog rau lwm cov tebchaw xws li silicon dioxide thiab carbon monoxide.
Cov txheej txheem Lely, tsim los ntawm Jan Anthony Lely hauv xyoo 1950, yog cov txheej txheem tshwj xeeb los tsim cov khoom siv siab kawg SiC. Cov txheej txheem suav nrog cua sov sib xyaw ntawm silicon thiab carbon saum lawv cov ntsiab lus melting los tsim cov kua, uas yog maj mam txias kom cia SiC crystals loj hlob. Cov txheej txheem no tuaj yeem tsim cov pob zeb loj loj ntawm SiC uas yog cov ntshiab huv thiab zoo. Lwm txoj hauv kev rau kev sib xyaw ntawm SiC yog cov txheej txheem Lely hloov kho, uas suav nrog kev ntxiv me me ntawm boron lossis txhuas rau silicon-carbon sib tov. Qhov no tshwm sim nyob rau hauv lub tsim ntawm aSiCCrystal nrog ntau dua doping concentration, ua rau nws muaj txiaj ntsig zoo rau kev siv hluav taws xob.
Kuj tseem muaj ob peb lwm txoj hauv kev los tsim SiC, xws li cov tshuaj vapor deposition (CVD) txoj kev thiab cov txheej txheem sol-gel. Cov txheej txheem no feem ntau yog siv los tsim cov yeeb yaj kiab nyias ntawm SiC siv rau hauv kev lag luam hluav taws xob.
Hauv kev xaus, SiC tuaj yeem tsim tau siv ntau txoj hauv kev, txhua tus muaj nws tus kheej zoo thiab qhov tsis zoo. Cov txheej txheem Acheson tseem yog txoj kev siv dav tshaj plaws vim nws txoj kev yooj yim thiab kev ntseeg tau, thaum cov txheej txheem Lely yog siv los tsim cov muaju zoo rau cov ntawv tshwj xeeb. Nrog nws cov khoom tshwj xeeb thiab ntau yam kev siv, SiC tseem yog cov khoom tseem ceeb hauv kev lag luam niaj hnub no.
JIYGO REFRACTORY & ABRASIVE LIMITED