Silicon carbide (SiC) yog ib qho sib xyaw ua ke ntawm silicon (Si) thiab carbon (C) nrog cov tawv tawv heev, thermal stability thiab hnav tsis kam. Nws yog ib qho tseem ceeb ntawm cov khoom siv dav siv hauv refractories, abrasives, semiconductor thiab electronic industries.
Cov yam ntxwv ntawm Silicon Carbide
1. High hardness:
- Silicon carbide lub hardness yog thib ob tsuas yog pob zeb diamond, nrog Mohs hardness ntawm 9.5, yog li nws feem ntau siv rau hauv kev tsim cov khoom muaj zog abrasives, txiav cov cuab yeej thiab cov ntaub ntawv hnav-resistant.
2. High thermal conductivity:
- Silicon carbide muaj cov thermal conductivity zoo heev thiab tuaj yeem tswj tau cov thermal conductivity zoo nyob rau hauv qhov chaw kub kub, ua rau nws tsim nyog siv los ua cov khoom siv refractory thiab cov khoom siv kub kub.
3. Kub kub kuj:
- Silicon carbide muaj qhov siab melting point ntawm txog 2700 degree thiab nyob ruaj khov ntawm qhov kub thiab txias, ua rau nws siv dav hauv cov cua kub kub hauv ob sab phlu, smelting furnaces thiab lwm yam ntaub ntawv refractory.
4. Tshuaj stability:
- Silicon carbide tiv taus cov kua qaub, alkalis thiab lwm yam tshuaj, ua rau nws tsim nyog siv los ua cov khoom siv tiv thaiv corrosion hauv kev lag luam tshuaj.
5. Zoo semiconductor khoom:
- Silicon carbide yog ib qho tseem ceeb ntawm cov khoom siv semiconductor nrog dav bandgap (txog 3.0 eV), siab hluav taws xob tawg lub zog thiab siab thermal conductivity, uas ua rau nws siv dav hauv cov khoom siv hluav taws xob nyob rau hauv lub zog siab, siab zaus thiab kub kub tej yam kev mob.
Silicon carbide siv
1. Cov khoom siv refractory:
- Silicon carbide yog dav siv nyob rau hauv kev tsim cov khoom siv refractory xws li kub-kub rauv hauv ob sab phlu, kiln rooj tog, thiab rauv pem teb vim nws zoo heev kub-kub thiab tshuaj tiv thaiv. Nws tseem tuaj yeem siv rau hauv kev tsim cov hlab ntsha uas muaj cua sov, crucibles thiab lwm yam khoom.
2. Abrasives:
- Vim lub siab hardness thiab abrasion tsis kam ntawm silicon carbide, nws yog dav siv nyob rau hauv kev tsim cov abrasives xws li cov cuab yeej sib tsoo, sib tsoo log thiab whetstones, uas yog siv los polish thiab txiav cov ntaub ntawv xws li hlau, pob zeb, iav thiab ceramics.
3. Semiconductors thiab electronics:
- Raws li ib tug dav bandgap semiconductor cov ntaub ntawv, silicon carbide yog dav siv nyob rau hauv lub tsim ntawm high-power, high-temperature, thiab high-frequency electronic devices xws li lub hwj chim switches, diodes, thiab high-frequency converters.SiC-raws li lub hwj chim pab kiag li lawm muaj. ntau dua efficiency thiab durability dua li cov pa silicon-based li.
4. Automotive thiab aerospace:
- Hauv kev lag luam tsheb, SiC yog siv los tsim cov khoom hnav-tiv taus xws li nres discs thiab clutches rau tsheb. Nyob rau hauv aerospace teb, SiC lub teeb yuag thiab high-temperature-resistant zog ua rau nws ib tug zoo tagnrho cov ntaub ntawv rau high-temperature structural Cheebtsam thiab engine qhov chaw.
5. Kev lag luam photovoltaic:
- Silicon carbide kuj tau siv dav hauv kev tsim hluav taws xob hnub ci, tshwj xeeb tshaj yog rau cov txheej txheem txiav polysilicon, SiC tuaj yeem txhim kho kev ua tau zoo thiab txo cov nqi tsim khoom.
6. Cov khoom siv ceramic:
- Silicon carbide tuaj yeem siv los ua cov khoom siv lub cev muaj zog, dav siv hauv kev npaj cov khoom siv ceramics, txhawm rau txhim kho cov khoom siv dag zog thiab hnav tsis kam ntawm ceramics.
tiv tauj peb
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