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Leben corundum la isku daray oo loogu talagalay foornada dhalaalaysa dhalada

Leben corundum la isku daray oo loogu talagalay foornada dhalaalaysa dhalada

Lebenka corundum cad ee la isku daray waa α-AL2O3, kaas oo iska leh nidaamka kristal trigonal. Waxaa la helaa iyadoo alumina -warshadeedka lagu dhalaaliyo heerkul aad u sarreeya oo ku jira foornada arc korontada, qaboojinta iyo kool -koolin -gelinta, ka dibna la jajabiyo, xulashada, habaynta iyo baaritaanka. Waa mid deggan oo ka mid ah noocyada badan ee alumina. Waxay leedahay dhibic dhalaalaysa oo sare (2030), cufnaanta sare (3.99 ~ 4.0g/cm3), qaab dhismeed is haysta, kuleyl wanaagsan oo kuleyl leh, isugeyn ballaarinta kuleylka yar (86 × 10-7/) iyo labis. Waa oksaydhka amphoteric, badiyaa alkaline ahaan daciif ah ama dhexdhexaad ah marka heerkulku sarreeyo, oo leh xasillooni kiimiko oo wanaagsan. Sidaa darteed, corundum -ka cad ee la isku daray ayaa ah wax diidaya kabka maalgelinta. Maaddada corundum cad ee la isku darsaday ayaa hodan ku ah kheyraadka macdanta oo qiimaheedu hooseeyo, taas oo mudan in la xusho oo la dallacsiiyo.

Tilmaamaha jirka iyo kiimikada ee lebenkii corundum ee la isku daray ee foornada dhalaalaysa dhalada:

Shayga FUSED CAST ALUMINA FUSED CAST ALUMINA FUSED CAST ALUMINA
ab Alumina TY-M a- Alumina TY-A b- Alumina TY-H
Halabuurka Kiimikada% Al2O3 94 98.5 93
SiO2 1 0.4
NaO2 4 0.9 6.5
Oksaydhka kale 1 0.2 0.5
Falanqaynta Crystallographic % a-Al2O3 44 90
b-Al2O3 55 4 99
Wajiga Vitreous 1 6 1