
Qaybaha dhoobada Alumina waa nooc ka mid ah walxaha dhoobada ah oo inta badan ka kooban alumina saafi ah oo sarreeya (Al ₂ O3), kaas oo leh adkeysi aad u sarreeya, iska caabin xirasho, iska caabin heerkul sare, iyo xasillooni kiimiko. Waxaa si weyn loogu isticmaalaa goobo warshadeed oo badan waana maaddada dhoobada warshadaha ee ugu weyn uguna ballaaran ee loo isticmaalo marka la eego mugga wax soo saarka.
| Shay | Al₂O₃≥99% | Al₂O₃≥95% | ZrO₂≥94% | |
| Jireed guryaha | Cufnaanta | 3.85 | 3.6 | 5.9 |
| Nuugista Biyaha % | 0 | 0 | 0 | |
| Heerkulka sifeynta °C | 1690 | 1670 | 1650 | |
| Sifooyinka tayada leh | Adkaanta HV | 1700 | 1600 | 1400 |
| Xoogga laalaabka 4pt | >3500 | >2900 | >11000 | |
| Xoogga cadaadiska /cm² | 30000 | 25000 | 25000 | |
| Sifooyinka Thermodynamic | Heerkulka ugu badan ee adeegga °C | 1500 | 1400 | 1600 |
| Isugeynta ballaarinta kulaylka | 8 | 7.8 | 10 | |
| 10-6/°C | ||||
| 0-1000°C | ||||
| Iska caabbinta shoogga kulaylka (°C) | 200 | 220 | 350 | |
| Gudbinta kulaylka W/mk | 31 | 22 | 3 | |
| Koronto sifooyinka | Iska caabinta mugga Ω.cm | >10^12 | >10^12 | >10^12 |
| Xoogga jebinta ee dahaarka KT/m | 18 | 16 | 15 | |
| Joogtada Dielectric 1MHZ(E) | 9.2-10.5 | 9.0-10 | 12.5 | |
| Dhererka (mm) | Ballaca (mm) | Dhererka (mm) | Dhumucda derbiga (mm) | Awoodda (cc) |
| 6-200 | 30-150 | 15-190 | >2 | 5-5000 |
1. Adkaanta sare iyo iska caabinta xirashada Adkaanta:
Adkaanta Mohs ee dhoobada alumina waxay la mid tahay heerka 9aad, marka la barbar dhigo dheemanka oo keliya. Iska caabbinta xirashada: Iska caabbinta xirashadu waa 266 jeer birta manganese iyo 171.5 jeer birta chromium-ka badan.
2. Iska caabinta heerkulka sare iyo xasilloonida kulaylka
Iska caabinta heerkulka sare: Barta dhalaalka ee dhoobada alumina waa mid aad u sarreysa ilaa 2050 ℃, waxayna ilaalin kartaa waxqabadka xasilloon heerkulka sare ee 2000 ℃. Xasiloonida kulaylka: Waxay leedahay isku-darka hoose ee ballaarinta kulaylka waxayna ilaalin kartaa xasilloonida qaab-dhismeedka iyadoo isbeddello heerkul aad u daran ay jiraan.
3. Cufnaanta naqshad fudud:
Cufnaanta dhoobada alumina waa 3.6-3.8g/cm³ oo keliya, taas oo ka badan 50% ka fudud birta. Tusaale ahaan, isticmaalka qaybaha dhoobada alumina ee diyaaradaha waxay yareyn kartaa miisaanka 30% waxayna si weyn u wanaajin kartaa hufnaanta shidaalka.
4Iska caabbinta daxalka iyo sifooyinka dahaarka Iska caabbinta daxalka:
Iska caabin aad u fiican oo ka dhan ah asiidhyada xooggan, alkalis, iyo milixda, oo ku habboon fal-galayaasha kiimikada, waalka ka hortagga daxalka, iwm. Dahaarka: Iyada oo leh iska caabin ah ≥ 1 × 10 ¹⁴Ω· cm, waa agabka ugu habboon ee loogu talagalay substrate-ka qalabka elektaroonigga ah ee soo noqnoqda sare leh.
5. Waxtarka kharash-badan Waxtarka kharashka:
Cimrigeeda dheer iyo astaamaheeda dayactirka oo hooseeya ayaa si weyn u dhimaya kharashyada muddada dheer.