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Leben silica ah

Leben silica ah

Lebenka silica waa leben la shiday oo ka kooban mullite (3Al2O3.2SiO2) iyo silbon carbide (SiC) oo ah macdanta ugu weyn. Sifooyinkiisu ma aha oo kaliya iska -caabbinta heerkulka sare ee mullite, laakiin sidoo kale iska -caabbinta xirashada, iska -caabbinta daxalka, iyo tabinta kuleylka wanaagsan ee carbide silikon. Markii Baosteel la dhisay 1980-maadkii, alaabtii dib-u-ceshiga ee laga keenay Nippon Steel, oo u ekayd taangiyada torpedo, waxay la mid ahaayeen lebenkii silikoon-caariyay ee hadda. Dhab ahaantii, waa wax la beddelay ee alaabooyinka silicate aluminium. Maaddada asalka ah ee macdanta birta ah waa leben is -celin ah oo inta badan laga sameeyay aluminium sare. Horumarka teknolojiyadeed ee warshadda birta iyo birta, si loo dardargeliyo xawaaraha samaynta birta, qaddar go’an oo Calcium oxide (CaO) ah ayaa la mariyaa waxa loogu yeero u-diyaargarowga. Sidan oo kale, maaddada dib-u-celinta ee taangiga waa inay u adkaysataa daxalka heerkulka sare ee birta la shubay oo ay iska caabiso daxalka alkaline ee xooggan. Sida iska cad, maaddada aluminium-ka sare uma adkaysan karto, markaa ku-daridda qaddar habboon oo carbide silikoon ah oo ku jirta maaddada aluminium-ka sare waxay samaysaa noocyo cusub. Warshadaha biraha waxay ugu yeeraan leben la shiday oo silicate aluminium ah oo lagu daray carbide silikoon.

Waxqabadka lebenka carbide silikon wuxuu ka yimaadaa habsocodkiisa. Marka hore, waxaa lagama maarmaan ah in la xusho alumina -ga fasalka gaarka ah oo leh Al2O3 oo ka sarreeya 80% alaabta ceeriin ah. Carbide silikoonku waa inuu ahaadaa mid saafi ah oo looga baahan yahay adkaanta Mohs waxay ku dhowdahay 9.5. Xulashada shirkadda ee carbide silicon waa mid aad u adag. Macdanta noocan ah aad bay dhif u tahay. Badeecadaha badankoodu waxay adeegsadaan SiO2 iyo C si ay isugu daraan SiC heerkulka sare ee foornada korontada. Alaabta ceeriin ee kala duwan ayaa soo saari doonta kala duwanaansho tayo leh. Waqtigan xaadirka ah, habka wax soo saarka ee SiC, SiO2 ee alaabta ceeriin waxay ka timaadaa silica dabiiciga ah, C -na wuxuu ka soo jeedaa coke dhuxul iyo dhuxul. Coke batroolka, sida ku cad natiijooyinkayaga cilmi -baarista, carbide silikon oo lagu soo daray coke batroolka iyo SiO2 waxay leedahay tilmaamo sare xagga adkaanta iyo xirashada iska caabbinta, waxayna ku habboon tahay in loo isticmaalo lebenka carbide silicon. Marxaladaha ugu qaalisan ee lebenkii la shiday ee laga sameeyay alaabta ceeriin waa mullite, carbide silicon iyo corundum. Macdanahaani waxay leeyihiin adayg aad u sarreeya, kaas oo aasaaska u ah badeecooyinka cillad cufan oo xoog badan.

mashruuca Hirgelinta Tusmada Brick Silica (JC/T 1064 – 2007)
GM 1650 GM 1600 GM 1550
AL2O3% ≧ 65 63 60
Cufnaanta bulk/(g/cm3 ≧ ≧ 2.65 2.60 2.55
Porosity muuqda% ≦ 17 17 19
Awoodda cadaadiska,/MPa ≧ 85 90 90
Heerkulka jilcinta xamuulka ℃ ≧ 1650 1600 1550
Degganaanshaha shooga kulul (1100 cooling biyo qaboojinta) jeer ≧ 10 10 12
Cabbirka heerkulka qolka/cm3 5 5 5