- 02
- Oct
Intee in le’eg ayay mullite lebenka dahaarka ee khafiifka ahi u adkaysan karaan?
Intee in le’eg ayay mullite lebenka dahaarka ee khafiifka ahi u adkaysan karaan?
Lebenka dahaarka ee Mullite waa nooc cusub oo ah shey jaban, kaas oo si toos ah ula xiriiri kara ololka. Waxay leedahay astaamaha caabbinta heerkulka sare, khafiifinta sare, tabinta kuleylka oo hooseeya, iyo saamaynta keydinta tamarta ee muhiimka ah. Lebenkii dahaarka ee khafiifka ah ee Mullite waxay leeyihiin astaamaha waxqabadka heerkulka sare oo wanaagsan iyo kharash yar. Waxaa loo isticmaali karaa gogosha qiiqa, taas oo aan si wax ku ool ah u yareyn karin tayada jirka foornada, keydinta dabka, laakiin sidoo kale kordhin karta nolosha adeegga ee dahaarka foornada iyo yareynta kharashyada dayactirka.
Lebenkii dahaarka ee khafiifka ah ee Mullite waxaa inta badan laga sameeyaa bauxite, dhoobo, “saddex dhagxaan”, iwm, iyada oo loo marayo samaynta tiro badan oo daloolo isku xiran ama xiran oo ku jira wax-ka-beddelidda maaddada ama hannaanka qallajinta heerkulka sare.
Tilmaamo ka mid ah lebenkii dahaarka fudud ee mullite:
Intee in le’eg ayay mullite lebenka dahaarka ee khafiifka ahi u adkaysan karaan? Iska caabbinta heerkulka sare ee lebenka dahaarka iftiinka mullite wuxuu gaari karaa meel ka sarreysa 1790 ℃. Heerka jilicsanaanta culeyska culeysku waa 1600-1700 ℃, heerka cadaadiska heerkulka caadiga ah waa 70-260MPa, iska caabbinta naxdinta kuleylka waa wanaagsan tahay, xooggu waa sarreeyaa, heerka qulqulka heerkulka sare wuu hooseeyaa, isugeynta ballaarinta ayaa hooseysa, isugeynta kuleylka waa yar yahay, oo dhagaxa aashitadu waa u adkaysi. Oo waxay si weyn u yareyn kartaa culeyska jirka foornada heerkulka sare leh, beddeli kara qaab-dhismeedka, keydin kartaa alaabta, keydin kartaa tamarta, iyo hagaajin kartaa wax-soo-saarka wax-soo-saarka.
Tirada dalabka ee mullite lebenka dahaarka fudud:
Lebenkii dahaarka ee khafiifka ah ee Mullite waxaa inta badan loo adeegsadaa foornooyinka heerkulka sare ka sarreeya 1400 ℃, saqafyada foornada heerkulka sare, dhudhunyada hore, qaansooyinka dib-u-cusboonaysiinta, dhismayaasha waaweyn ee foornooyinka dhalaalaya galaaska, dhoobada dhoobada dhoobada, dhoobada dhoobada dhoobada, godadka tunnel, dahaarka gudaha ee dahaarka korantada makiinadda khaanadda, daboolka foornada geeska dhintay ee nidaamka dillaaca batroolka, weelka dhalada ku jira iyo foornooyinka korontada ee kala duwan ayaa si toos ah ula xiriiri kara ololka.
Tilmaamaha jirka iyo kiimikada ee lebenka dahaarka iftiinka mullite:
| Tusaha/Tilmaamaha Alaabta | ρ = 0.8 | ρ = 1.0 | ρ = 1.2 |
| Heerkulka kala soocidda （℃） | 1400 | 1550 | 1600 |
| Al2O3 （%） ≥ | 50 ~ 70 | 65 ~ 70 | 79 |
| Fe2O3 （%） ≤ | 0.5 | 0.5 | 0.5 |
| Cufnaanta Jumlada (g / cm3) | 0.8 | 1.0 | 1.2 |
| Awoodda cadaadiska heerkulka qolka (Mp) | 3 | 5 | 7 |
| Dhaqdhaqaaqa kuleylka (350 ℃) W/(mk) | 0.25 | 0.33 | 0.42 |
| Heerkulka jilcinta xamuulka (℃) (0.2 Mp, 0.6%) | 1400 | 1500 | 1600 |
| Dib -u -kululaynta heerka isbeddelka toosan% (1400 × h 3h) | ≤0.9 | ≤0.7 | ≤0.5 |
| Heerkulka isticmaalka muddada-dheer (℃) | 1200 ~ 1500 | 1200 ~ 1550 | 1500-1700 |