Taw qhia
Silicon carbide yog cov khoom tsis yog-hlau cov ntxhia ua rau kub siab tshaj 1800 degree, siv quartz xuab zeb (SiO₂) thiab roj av coke (C) ua cov khoom siv raw. Nws muaj cov hardness siab, qis coefficient ntawm thermal expansion, brittleness, thiab zoo heev thermal conductivity.
Vim tias cov khoom no, silicon carbide tau siv dav hauv ntau qhov chaw, suav nrog cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, cov khoom siv tshwj xeeb, cov khoom siv ua npuas ncauj, cov coatings, thiab cov yas hloov kho. Nws kuj pom cov ntawv thov hauv tsheb, tub rog thiab kev lag luam aerospace, steelmaking, thiab ua deoxidizer.
kev ua yeeb yam
| Performance Indicators | Parameter Range | Cov yam ntxwv tsom xam |
|---|---|---|
| Melting Point | 2700℃(sublimation) | Siab dua cov ntaub ntawv refractory feem ntau, haum rau ultra-siab- qhov kub thiab txias (xws li, blast furnaces, ceramic kilns). |
| Kev ceev ceev | 3.0-3.2g / cm³ | High density, zoo heev lub zog thiab hnav tsis kam. |
| Thermal conductivity | 20-40 W / (m·K) (ntawm 200 degree) | Ntau dua li cov khoom siv refractory ib txwm muaj (xws li corundum, av nplaum), nrog rau cov cua sov sai sai thiab zoo heev thermal shock resistance. |
| Flexural zog | 200-500 MPa (ntawm chav tsev kub) | Tsawg attenuation ntawm lub zog ntawm qhov kub thiab txias, tuav lub zog siab ntawm 1400 degree. |
| Tshuaj Stability | Muaj zog tiv taus acidic slag, nruab nrab tsis kam rau alkaline slag (reacts nrog alkaline tshuaj zoo li Na₂O ntawm qhov kub thiab txias). | Resistant corrosion los ntawm HF thiab siab -kub gases (piv txwv li, CO, H₂), tab sis yuav tsum tsis txhob sib cuag ncaj qha nrog cov oxidants muaj zog. |
| Thermal Shock Resistance | Tsis muaj kev tawg tom qab 300-800℃kub qhov sib txawv | Tsawg thermal expansion coefficient (4.5 × 10⁻⁶ / degree), ua ke nrog cov thermal conductivity siab, haum rau kev ua haujlwm nrog kub hloov pauv. |
Lub cev thiab tshuaj Specifications
| Crystal Form | Hexagonal Crystal ntawm Silicon Carbide | ||
| Qhov ceev (g / cm³) | 3.20 | ||
| Hardness | hmo 9.5 | ||
| Xim | Dub | ||
|
Tshuaj Kev sib xyaw |
SiC |
iCF ua. C. |
Fe203 ua |
|
F12-F220 |
98% Min |
0.3% Max |
0.5% Max |
|
F12-F90 |
Ntau dua lossis sib npaug rau 98.50 |
<0.20 |
0.5% Max |
|
F100-F150 |
Ntau dua lossis sib npaug li 98.00 |
<0.30 |
0.6% Max |
|
F180-F220 |
Ntau dua lossis sib npaug li 97.00 |
<0.30 |
0.65% Max |
|
F230-F400 |
Ntau dua lossis sib npaug li 96.00 |
<0.40 |
0.65% Max |
|
F500-F800 |
Ntau dua lossis sib npaug li 95.00 |
<0.40 |
0.70% Max |
|
F1000-F1200 |
Ntau dua lossis sib npaug rau 93.00 |
<0.50 |
0.80% Max |
|
P12-P90 |
Ntau dua lossis sib npaug rau 98.50 |
<0.20 |
0.5% Max |
|
P100-P150 |
Ntau dua lossis sib npaug li 98.00 |
<0.30 |
0.5% Max |
|
P180-P220 |
Ntau dua lossis sib npaug li 97.00 |
<0.30 |
0.65% Max |
|
P230-P500 |
Ntau dua lossis sib npaug li 96.00 |
<0.40 |
0.65% Max |
|
P600-P1500 |
Ntau dua lossis sib npaug li 95.00 |
<0.40 |
0.70% Max |
|
P2000-P2500 |
Ntau dua lossis sib npaug rau 93.00 |
<0.50 |
0.80% Max |
Specification
|
Particle Loj |
0-1mm 1-3mm 3-5mm 5-8mm |
|
Micronized hmoov |
F500, F2500, -100mesh -200mesh -320mesh |
|
Granular Xuab zeb |
8# 10# 12# 14# 16#20# 22# 24# 30# 36# 46# 54# 60# 80# 100# 120# 150# 180# 220# |
|
Micronized hmoov (tus qauv) |
W63 W50 W40 W28 W20 W14 W10 W7 W5 W3.5 W2.5 |
|
JIS |
240# 280# 320# 360# 400# 500# 600# 700# 800# 1000# 1200# 1500# 2000# 2500# 3000# 4000# 6000# |
|
FEPA |
F230 F240 F280 F320 F360 F400 F500 F600 F800 F1000 F1200 F1500 |
Txheej txheem ntau lawm
Cov txheej txheem Synthesis
High -Tsub Sintering Method:
Quartz xuab zeb thiab roj av coke yog siv los ua raw khoom. Silicon carbide (SiC) yog tsim los ntawm cov tshuaj tiv thaiv nyob rau hauv lub qhov cub tsis kam ntawm qhov kub ntawm 2,000-2,200 degree. Cov khoom uas tau tshwm sim yog ces crushed thiab purified kom tau SiC hais los yog hmoov.
Vapor Phase Deposition Method:
High-purity SiC yog tsim los ntawm cov pa roj- theem cov tshuaj tiv thaiv ntawm silicon tetrachloride (SiCl₄) thiab methane (CH₄) ntawm qhov kub siab. Txoj kev no feem ntau yog siv los tsim cov qib siab -cov txheej txheem ceramic lossis ultrafine hmoov.
Kev khi txoj kev (hauv Refractories)
Clay Bonding: Av nplaum yog siv los ua tus khi. Tom qab molding thiab ziab, cov khoom tsim nyog rau qis - thiab nruab nrab -kub refractory daim ntaub ntawv.
Oxide Bonding: Oxides xws li Al₂O₃ thiab SiO₂ hnov mob nrog SiC los tsim cov qib sib txuas zoo li mullite thiab glassy theem, uas txhim kho cov khoom muaj zog.
Self- Bonding: Bonding yog ua tiav los ntawm cov khoom-theem lossis kua-theem sintering ntawm SiC hais ntawm qhov kub thiab txias, ua rau cov khoom ntom ntom, siab - cov khoom muaj zog.
Nitride Bonding: Silicon nitride (Si₃N₄) sib txuas theem yog tsim los ntawm cov tshuaj tiv thaiv ntawm silicon (Si) thiab nitrogen (N₂), ua nitride-bonded silicon carbide (N-SiC) nrog zoo heev corrosion kuj.
Daim ntawv thov
(1) Silicon Carbide rau cov khoom siv refractory
Thaum lub sij hawm tsim thiab ua cov dub silicon carbide, ib qho tseem ceeb ntawm cov khoom uas muaj purity qis dua 90% -feem ntau hu ua "qis-silicon" dub silicon carbide- yog generated. Qhov qis dua -purity silicon carbide no yog dav siv nyob rau hauv refractory thiab steelmaking industries, tshwj xeeb tshaj yog nyob rau hauv daim ntawv thov xws li deoxidizers, phom av nplaum, casting cov ntaub ntawv, thiab hlau trench cov ntaub ntawv.
Peb lub tuam txhab muab ntau yam ntawm silicon carbide specifications thoob plaws hauv lub xyoo, nrog rau cov qib purity muaj xws li: 98%, 95%, 90%, 88%, 85%, 80%, 75%, 70%, 65%, 60%, 55%, 50%, 45%, thiab 40%. Qhov ntau thiab tsawg tuaj yeem ua raws li cov neeg siv khoom xav tau. Tus qauv loj muaj xws li 0-1 hli, 0-50 hli, 1-10 hli, thiab 100-400 mesh.
(2) Silicon Carbide rau Steel Deoxidation thiab Casting
Silicon carbide yog ib qho kev sib xyaw ntawm cov pa roj carbon thiab silicon, feem ntau sib txuas los ntawm covalent bonds, thiab raug cais raws li cov khoom tsis yog - oxidizing. Txawm li cas los xij, nws yuav tsis ruaj khov thaum raug kub hnyiab hauv qhov chaw oxidizing -tshwj xeeb tshaj yog saum 1627 degree, qhov twg oxidation tshwm sim sai heev. Leveraging cov cuab yeej no hauv steelmaking pab txo cov nqi tsim khoom thiab tau pom cov txiaj ntsig zoo.
Cov qib feem ntau siv los ntawm 80% mus rau 95% purity, nrog qhov loj me ntawm 0-10 hli, 0-5 hli, 1-3 hli, thiab 1-5 hli. Qhov loj 1-5 mm yog tshwj xeeb tshaj yog nrov rau kev siv casting.
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