Silicon Carbide (SiC) yog ib qho kev sib xyaw ua ke ntawm cov khoom silicon thiab carbon, uas yog siv dav hauv ntau daim ntawv thov kev lag luam vim nws lub cev thiab tshuaj lom neeg tshwj xeeb. Nws yog thawj zaug tsim los ntawm Swedish chemist Jöns Jacob Berzelius nyob rau hauv nruab nrab -19th caug xyoo thiab tau dhau los ua ib qho tseem ceeb tshaj plaws hauv kev lag luam. Silicon carbide plays lub luag haujlwm tseem ceeb hauv kev lag luam niaj hnub vim nws cov hardness siab heev, zoo thermal conductivity thiab corrosion kuj.
Cov yam ntxwv ntawm silicon carbide
1. Kev nyuaj siab heev: Silicon carbide muaj Mohs hardness ntawm 9.0-9.5, thib ob tsuas yog pob zeb diamond. Qhov no ua rau nws muaj txiaj ntsig zoo rau cov khoom siv abrasive thiab cov cuab yeej txiav.
2. High Thermal Conductivity: Silicon carbide muaj cov thermal conductivity siab, uas ua rau nws dissipate tshav kub zoo nyob rau hauv high-temperature ib puag ncig, ua rau nws haum rau siv raws li ib tug tshav kub dissipation khoom thiab tshav kub-conducting substrate.
3. Lub siab melting point thiab high-temperature stability: Silicon carbide muaj ib tug melting point txog li 2700 degree thiab tswj nws lub cev muaj zog nyob rau hauv high-temperature ib puag ncig, yog li nws yog feem ntau siv raws li ib tug refractory khoom.
4. Chemical stability: Silicon carbide tsis yooj yim corroded los ntawm acids, alkalis thiab lwm yam tshuaj, thiab muaj tshuaj zoo heev thiab oxidation kuj nyob rau hauv hnyav ib puag ncig.
5. Cov Khoom Siv Hluav Taws Xob: Silicon carbide yog cov khoom siv dav hauv cov khoom siv semiconductor nrog cov khoom siv hluav taws xob siab, cov khoom siv hluav taws xob muaj zog thiab kev ua haujlwm ruaj khov ntawm qhov kub thiab txias, uas yog ib qho tseem ceeb rau kev tsim cov khoom kub, muaj zog thiab muaj zog hluav taws xob.
Daim ntawv thov ntawm silicon carbide
1. Abrasives: Lub hardness siab heev ntawm silicon carbide ua rau nws zoo tagnrho rau kev tsim cov sib tsoo log, abrasives, txiav cov cuab yeej thiab polishing cov ntaub ntawv rau kev ua cov ntaub ntawv nyuaj, xws li ceramics, hlau, iav thiab pob zeb.
2. Cov ntaub ntawv refractory: Vim nws qhov siab melting point thiab kub stability, silicon carbide yog dav siv nyob rau hauv kev tsim khoom ntawm high-temperature resistant refractory cov ntaub ntawv, xws li kiln linings, crucibles, thiab refractory cib.
3. Cov khoom siv semiconductor: Raws li cov khoom siv semiconductor thib peb, silicon carbide yog siv los tsim cov khoom siv hluav taws xob kub, muaj zog thiab muaj zog hluav taws xob vim nws qhov dav bandgap yam ntxwv, tshwj xeeb tshaj yog nyob rau hauv cov tsheb fais fab, cov khoom siv hluav taws xob tauj dua tshiab, thiab cov khoom siv sib txuas lus rau kev siv loj hlob.
4. Cov ntaub ntawv thermal conductive: Silicon carbide siab thermal conductivity ua rau nws tseem ceeb hauv kev tswj thermal ntawm cov khoom siv hluav taws xob, thiab nws tau siv dav hauv cov cua kub dissipation substrates, fais fab modules, thiab lwm yam.
5. Kev lag luam tshuaj: Vim nws cov tshuaj tiv thaiv zoo heev, silicon carbide yog siv los tsim cov tshuaj reactors, kav dej, twj tso kua mis, ntsaws ruaj ruaj thiab lwm yam khoom siv corrosion-resistant.
6. Hnub Ci Kev Lag Luam Photovoltaic: Silicon carbide yog dav siv nyob rau hauv cov txheej txheem ntawm lub hnub ci hlwb, tshwj xeeb tshaj yog raws li ib tug txiav abrasive nyob rau hauv silicon wafer txiav.
7. Automotive thiab Aerospace: Silicon carbide feem ntau yog siv rau hauv kev tsim cov tsheb nres discs, aerospace engine Cheebtsam, thiab lwm yam vim nws lub teeb yuag, siab zog thiab kub-resistant zog.
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