Silicon carbide (SiC) yog cov khoom siv ceramic uas nquag zus raws li ib qho siv lead ua rau kev siv semiconductor. Vim nws cov khoom siv hauv paus ntsiab lus thiab kev loj hlob ib leeg-crystal, nws yog ib qho ntawm cov khoom siv hluav taws xob ruaj khov tshaj plaws ntawm kev ua lag luam. Qhov no durability ncua deb tshaj nws cov hluav taws xob functionality.
Lub cev Durability
SiC lub cev lub cev muaj zog yog qhov zoo tshaj plaws los ntawm kev tshuaj xyuas nws cov ntawv tsis siv hluav taws xob: ntawv xuab zeb, extrusion tuag, daim hlau tsis muaj phom sij, cov khoom siv ua haujlwm siab, thiab cov nplaim hluav taws. SiC yuav khawb ib yam khoom uas tsis yog khawb nws tus kheej. Thaum siv nyob rau hauv kev ua haujlwm siab nres disks, lawv cov kev tiv thaiv rau lub sij hawm ntev hnav nyob rau hauv ib puag ncig hnyav raug muab tso rau qhov kev xeem. Rau kev siv raws li lub tsho tiv thaiv mos txwv phaj, SiC yuav tsum muaj lub cev muaj zog thiab muaj zog.
Tshuaj thiab hluav taws xob Durability
SiC muaj npe nrov rau nws cov tshuaj inertness; Nws tsis muaj kev cuam tshuam los ntawm cov tshuaj phem tshaj plaws, xws li alkalis thiab molten ntsev, txawm tias thaum raug kub txog li 800 ° C. Vim nws tsis kam mus rau tshuaj tua kab mob, SiC tsis yog corrosive thiab tuaj yeem tiv taus qhov chaw hnyav nrog rau cov huab cua ntub, dej ntsev, thiab ntau yam tshuaj.
Raws li qhov tshwm sim ntawm nws lub zog siab bandgap, SiC muaj zog tiv taus hluav taws xob cuam tshuam thiab kev puas tsuaj ntawm hluav taws xob. SiC kuj tseem tiv taus kev puas tsuaj ntawm qib siab dua li Si.
Thermal Shock Resistance
SiC qhov tsis kam rau thermal shock yog lwm yam tseem ceeb. Thaum ib yam khoom raug rau qhov kub thiab txias gradient, thermal shock tshwm sim (piv txwv li, thaum sib txawv ntawm cov khoom nyob rau ntawm qhov kub sib txawv). Raws li qhov tshwm sim ntawm qhov kub thiab txias gradient, tus nqi ntawm kev nthuav dav lossis kev cog lus yuav txawv ntawm ntau ntu. Thermal shock tuaj yeem ua rau tawg ntawm cov ntaub ntawv nkig, tab sis SiC tiv taus cov teebmeem no. Lub thermal shock tsis kam ntawm SiC yog qhov tshwm sim ntawm nws cov thermal conductivity (350 W / m / K rau ib qho siv lead ua) thiab qis thermal expansion piv rau feem ntau ntawm cov khoom siv semiconductor.
SiC cov khoom siv hluav taws xob (xws li MOSFETs thiab Schottky diodes) yog siv rau hauv cov ntawv thov uas muaj kev kub ntxhov, xws li HEVs thiab EVs, vim lawv cov kav ntev. Nws yog ib qho khoom siv zoo heev rau kev siv hauv semiconductor daim ntaub ntawv uas yuav tsum tau toughness thiab dependability vim nws lub cev, tshuaj, thiab hluav taws xob resilience.
