Dub Silicon Carbide ntau lawm thiab ua thiab daim ntawv thov teb

Dub silicon carbide (SiC)yog ua los ntawm quartz xuab zeb, roj av coke (los yog thee coke), ntoo chips li raw cov ntaub ntawv los ntawm kub smelting kuj rauv. Dub silicon carbide muaj txog 98.5% SiC, thiab nws cov tawv tawv yog siab dua ntsuab silicon carbide. Nws feem ntau yog siv rau kev ua cov ntaub ntawv uas tsis muaj zog tensile, xws li iav, ceramics, pob zeb, refractory cov ntaub ntawv, cam khwb cia hlau thiab non-ferrous hlau. Dub silicon carbide vim muaj cov khoom siv ruaj khov, thermal conductivity, me me thermal expansion coefficient, zoo hnav tsis kam, ntxiv rau abrasive, muaj ntau lwm yam kev siv, xws li: nrog ib tug tshwj xeeb txheej txheem rau silicon carbide hmoov coated nyob rau hauv lub puab phab ntsa. ntawm lub turbine impeller los yog lub tog raj kheej lub cev, tuaj yeem txhim kho nws qhov hnav tsis kam thiab txuas ntxiv lub neej kev pabcuam 1 ~ 2 zaug; Siv los ua cov khoom siv high-grade refractory, tshav kub tsis kam, me me, lub teeb yuag thiab siab zog, zoo zog txuag cov nyhuv. Tsawg-qib silicon carbide (muaj li 85% SiC) yog ib qho zoo heev deoxidizer, uas tuaj yeem ua kom cov hlau ua kom ceev, pab tswj cov tshuaj muaj pes tsawg leeg, thiab txhim kho cov hlau zoo. Tsis tas li ntawd, silicon carbide kuj tau siv dav hauv kev tsim hluav taws xob cua sov caij silicon carbon pas nrig.

Dub silicon carbide hardness yog loj heev, muaj thermal conductivity zoo heev, raws li cov yam ntxwv saum toj no ntawm silicon carbide abrasive kuj yog ib qho khoom zoo tshaj plaws rau kev tshaj sandblasting, sib tsoo, polishing kev lag luam.

Dub silicon carbide, ntsuab silicon carbide ntau lawm ntawm raw cov ntaub ntawv thiab kev ua:

Dub siliconcarbide yog quartz xuab zeb, roj av coke thiab high-zoo silica raws li cov ntaub ntawv tseem ceeb, los ntawm cov hluav taws kub kub smelting. Nws hardness yog nruab nrab ntawm corundum thiab pob zeb diamond, txhua yam muaj zog yog siab dua corundum, nkig thiab ntse.

Ntsuab silicon carbide yog ua los ntawm roj av coke thiab zoo silica raws li cov ntaub ntawv tseem ceeb, ntxiv ntsev raws li ib tug additive, los ntawm kub smelting kuj rauv. Nws hardness yog nruab nrab ntawm corundum thiab pob zeb diamond, thiab nws lub zog txhua yam yog siab dua corundum.

Feem ntau siv silicon carbide abrasives muaj ob lub pob zeb sib txawv, ib qho yog ntsuab silicon carbide, muaj ntau dua 97% SiC, feem ntau yog siv rau kev sib tsoo cov cuab yeej kub kub. Lwm qhov yog dub silicon carbide, nws yog xim hlau luster, muaj ntau dua 95% SiC, lub zog loj dua ntsuab silicon carbide, tab sis qhov hardness yog qis dua, feem ntau yog siv rau kev sib tsoo cam khwb cia hlau thiab cov khoom tsis yog xim hlau.

Silicon carbide molecular mis yog SiC, nws hardness yog nruab nrab ntawm corundum thiab pob zeb diamond, txhua yam muaj zog yog siab tshaj corundum, yuav siv tau raws li abrasive thiab ib co lwm yam khoom siv. Kev lag luam silicon carbide tau ntse tsim nyob rau hauv 1891 thiab yog qhov ntxov tshaj plaws abrasive. Txawm hais tias ib qho me me ntawm silicon carbide muaj nyob rau hauv cov meteorites thiab cov pob zeb, tsis muaj cov pob zeb hauv av tau pom rau kev tsuas yog tam sim no. Ntshiab silicon carbide yog cov xim tsis muaj pob tshab. Kev lag luam silicon carbide yog lub teeb daj, ntsuab, xiav thiab txawm tias dub vim yog hom thiab cov ntsiab lus ntawm impurities muaj, thiab cov pob tshab sib txawv nrog nws cov purity. Cov qauv siv lead ua silicon carbide tau muab faib ua hexagonal lossis rhombohedral -SiC thiab cubic -SiC (hu ua cubic silicon carbide). -SiC tsim ntau yam sib txawv vim qhov sib txawv sib txawv ntawm cov pa roj carbon thiab silicon atoms hauv nws cov qauv siv lead ua, thiab ntau dua 70 ntau yam tau pom. -SiC hloov mus rau -SiC ntawm 2100 degree lossis siab dua.

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