Silicon carbide (SiC) paub txog qhov tshwj xeeb hardness, thermal stability thiab tshuaj tsis kam. Ntawm cov qib kev lag luam, silicon carbide 88, feem ntau muaj nyob ib ncig ntawm 88% SiC nrog cov seem uas yog silica thiab cov sib txuas me me, tuav tus nqi - ua haujlwm nruab nrab zoo. Ib lo lus nug ntau los ntawm cov neeg yuav khoom thiab cov kws tsim khoom yog seb SiC 88 puas tuaj yeem siv rau ob qho tib si abrasive thiab refractory lub hom phiaj. Cov lus teb luv luv yog yog rau cov qauv siv, nrog rau qhov tsim nyog nyob ntawm qhov kev xav tau tshwj xeeb thiab kev ua haujlwm ntawm txhua tus txheej txheem.
Cov khoom tseem ceeb ntawm Silicon Carbide 88
| Khoom | Yam nqi | Kev cuam tshuam |
|---|---|---|
| Hardness | Hmo ~ 9.5 | Kev txiav zoo, sib tsoo thiab hnav tsis kam |
| Qhov ntom | 3.2 g / cm³ | Teeb pom kev zoo rau lub refractory aggregate |
| Thermal stability | Sublimation / decomposition txog 2,700-2,830 degree | Nyob ruaj khov nyob rau hauv siab - qhov kub thiab txias qhov chaw ib puag ncig |
| Oxidation cwj pwm | Kev tiv thaiv SiO₂ nplai cov ntaub ntawv hauv huab cua ntawm qhov kub thiab txias | Lub sijhawm ntev - huab cua kev pabcuam tau txwv txog li 1,400-1,600 degree |
| Thermal conductivity | Siab (dense SiC kwv yees li 100-120 W / m·K) | Ua kom muaj cua sov dissipation thiab thermal shock kuj |
| Tshuaj tiv thaiv | Muaj zog tiv thaiv oxidation thiab corrosion ntawm siab kub | Suits txhoj puab heev cua sov cua |
| Purity | ≈88% SiC; impurities feem ntau silica thiab cov pa roj carbon me me | Tus nqi - zoo tab sis txwv ultra- cov dej num ntshiab |
SiC 88 hauv Abrasive Applications
Nyob rau hauv lub abrasive teb, lub siab hardness ntawm SiC 88 enables zoo tshem tawm cov khoom nyob rau hauv sib tsoo, txiav thiab polishing, thiab nws muaj nyob rau hauv ntau yam grit ntau thiab tsawg los ntawm ntxhib mus rau nplua. Nws tus nqi qis dua siab tshaj -purity SiC ua rau nws pheej yig rau cov khoom loj - nplai abrasive xws li kev sib tsoo log, txiav tawm discs thiab sandblasting media, thiab rau kev npaj nto hauv tsheb, nkoj tsim thiab kev tsim kho, nrog rau lapping ntawm tsis yog - ceramics tseem ceeb thiab cam khwb cia hlau.
Qhov kev txwv tseem ceeb yog purity: SiC 88 muaj cov impurities ntau dua li siab dua - qib purity, yog li nws tsis yog qhov zoo tagnrho rau kev polishing los yog kho qhov muag qhov chaw uas muaj paug yuav tsum tau txo qis.
SiC 88 hauv Refractory Applications
Raws li cov khoom siv refractory, SiC 88 khaws cov txheej txheem kev ncaj ncees ntawm qhov kub thiab txias, tiv thaiv thermal shock, thiab muaj cov khoom siv zoo hauv cov khoom siv hluav taws xob, cov rooj tog zaum, cov khoom siv hluav taws xob, cov khoom siv hluav taws xob thiab cov cement kiln. Nws ua tau zoo nyob rau hauv feem ntau cov qauv refractory daim ntaub ntawv mus txog kwv yees li 2,500℃nyob rau hauv non-oxidizing tej yam kev mob; nyob rau hauv huab cua, qhov ua tau ntev - lub sij hawm kev pab cuam txwv yog qis dua, nyob ib ncig ntawm 1,400-1,600 degree, vim oxidation.
Rau qhov chaw muaj tshuaj lom neeg hnyav heev, xws li kev sib cuag nrog molten siab - purity hlau los yog corrosive fluxes , siab dua - purity los yog tshwj xeeb formulated qib SiC tej zaum yuav nyiam kom tsis txhob silica - cov tshuaj tiv thaiv.
Abrasive vs Refractory: Sib piv Analysis
| Khoom | Kev siv abrasive | Kev siv refractory |
|---|---|---|
| Hardness yuav tsum tau | Siab heev | Siab |
| Thermal stability | Nruab nrab (intermittent heat) | Siab heev (nruam kub kub) |
| Purity rhiab heev | Medium (nto tiav) | Nruab nrab -siab (chemical reactivity) |
| Impurity kam rau ua | Txais ib co silica | Yuav tsum txwv silica rau qee yam melts |
| Tus nqi tseem ceeb | Tus nqi -ntau npaum li cas | Tus nqi sib npaug nrog lub neej ntev |
SiC 88 ua tau zoo nyob rau hauv ob qho tib si rau cov qauv kev ua haujlwm, muab qhov sib npaug ntawm kev ua tau zoo thiab tus nqi thaum ultra- purity siab tsis tsim nyog.
Kev Qhia Txog Kev Xaiv: Thaum SiC 88 txaus, Thaum twg los hloov kho
Xaiv SiC 88 thaum daim ntawv thov xav tau cov khoom siv txhim khu kev qha, kev lag luam rau kev siv dav dav - lub hom phiaj sib tsoo lossis cov txheej txheem refractory linings, thaum kev ua haujlwm tsis tas yuav tsum muaj ultra- qib impurity tsawg, thiab thaum cov peev nyiaj nyiam nruab nrab - qib purity yam tsis muaj kev cuam tshuam kev ua haujlwm tseem ceeb. Txhim kho kom siab dua -purity SiC (Ntau dua lossis sib npaug li 90-98%) lossis ntsuab SiC (Ntau dua lossis sib npaug li 99%) thaum qhov kev ua tiav saum npoo yog qhov tseem ceeb hauv cov khoom abrasive, lossis thaum cov txheej txheem cuam tshuam nrog cov tshuaj reactive heev, corrosive fluxes lossis molten hlau uas tuaj yeem hnov mob nrog silica.
Cov lus nug nquag
SiC 88 puas tuaj yeem hloov siab dua - qib purity hauv abrasives?Nws tuaj yeem hloov tau lawv nyob rau hauv dav dav - lub hom phiaj sib tsoo, tab sis tsis yog nyob rau hauv precision polishing los yog kho qhov muag tiav qhov uas tsis muaj impurity theem tseem ceeb heev.
Puas yog SiC 88 muaj kev nyab xeeb rau kev siv txuas ntxiv hauv qhov cub?Yog lawm, nyob rau hauv feem ntau cov qauv refractory daim ntawv thov txog li 2,500℃nyob rau hauv uas tsis yog - oxidizing tej yam kev mob. Hauv huab cua, qhov ntev - lub sijhawm txwv qis dua, txog 1,400-1,600 degree, vim yog oxidation.
Dab tsi yog qhov txwv ntawm SiC 88 hauv kev siv refractory?Nyob rau hauv corrosive melts los yog fluxes, silica impurities tej zaum yuav hnov, yog li siab dua - qib purity.
Ib qib puas tuaj yeem txiav txim rau ob qho tib si abrasive thiab refractory siv?Yog lawm, SiC 88 tuaj yeem ua haujlwm rau ob qho tib si, tab sis cov neeg yuav khoom yuav tsum tau qhia lub luag haujlwm npaj kom muaj qhov loj me, grit tis thiab impurity profile yog sib npaug rau cov txheej txheem.
Dub thiab ntsuab SiC piv nrog SiC 88 li cas?Dub SiC feem ntau yog 95-97% ntshiab thiab ntsuab SiC saum 99%; ob qho tib si raug nqi ntau dua SiC 88 thiab raug xaiv thaum purity thiab kev ua tau zoo tsim nyog tus nqi.
Dab tsi yog qhov loj me me rau SiC 88?Metallurgical SiC 88 feem ntau muab los ua pob (6-25 hli lossis loj dua), granules, grits rau abrasives, thiab hmoov, nyob ntawm daim ntawv thov.