Kev ceev faj rau kev siv cov silicon carbide rods rau kev sim hluav taws xob rauv

1. Thaum siv lub tshuab hluav taws xob, qhov cub kub yuav tsum tsis txhob siab tshaj qhov ntsuas kub rau lub sijhawm ntev kom tsis txhob muaj kev puas tsuaj rau cov cua sov. Nws yog txwv tsis pub ncuav ntau yam kua nplaum thiab cov hlau molten rau hauv lub qhov cub.

2. Cov pas nrig silicon carbide yog ib qho nyuaj thiab nkig, yog li ceev faj thaum thauj khoom thiab tshem tawm.

3. Lub silicon carbide rods yuav tsum tau muab cia rau hauv qhov chaw qhuav kom tsis txhob deterioration ntawm aluminium-plated kawg vim ya raws.

4. Molten KOH, NaOH, Na2CO3 thiab K2CO3 decompose SiC ntawm kub kub kub. Silicon carbide rods yuav corroded nyob rau hauv kev sib cuag nrog alkali, alkaline ntiaj teb hlau, sulfates, borides, thiab lwm yam., yog li ntawd lawv yuav tsum tsis txhob raug hu nrog silicon carbide rods.

5. Kev xaim ntawm silicon carbide pas nrig yuav tsum nyob ze nrog lub taub hau dawb aluminium ntawm qhov txias kawg ntawm tus pas nrig kom tsis txhob tawg.

6. Cov pas nrig silicon carbide reacts nrog Cl2 ntawm 600 ° C thiab reacts nrog dej vapor ntawm 1300-1400 ° C. Cov pas nrig silicon carbide tsis oxidized hauv qab 1000 ° C, thiab oxidized ntau ntawm 1350 ° C, ntawm 1350-1500 ° C. Cov yeeb yaj kiab tiv thaiv ntawm SiO2 yog tsim nyob rau hauv nruab nrab thiab ua raws li qhov chaw ntawm silicon carbide pas nrig kom tiv thaiv SiC los ntawm kev txuas ntxiv mus rau oxidize.

7. Tus nqi tiv thaiv ntawm silicon carbide pas nrig nce raws li lub sij hawm siv ntawm silicon carbide qws nce, thiab cov tshuaj tiv thaiv yog raws li nram no:

SiC + 2O2 = SiO2 + CO2

SiC + 4H2O = SiO2 + 4H2 + CO2

Qhov siab dua cov ntsiab lus ntawm SiO2, ntau dua qhov kev tiv thaiv tus nqi ntawm silicon carbide rods. Yog li ntawd, cov qub thiab tshiab silicon molybdenum rods tsis tuaj yeem sib xyaw, txwv tsis pub tus nqi kuj yuav tsis sib npaug, uas yog qhov tsis zoo rau qhov kub thiab txias thiab kev pabcuam lub neej ntawm silicon carbide rods.