Alumina dhoobadawaa nooc ka mid ah walxaha dhoobada ah oo inta badan ka kooban aluminium oxide (AI2O3), oo loo isticmaalo sida walxaha dahaadhka ah ee qaybaha korantada.Alumina dhoobadawuxuu leeyahay hab-dhaqan wanaagsan, xoog farsamo, iyo iska caabin heerkul sare ah.Sifooyinkeeda ayaa ka dhigaya mid ka mid ah dhoobada aadka loo isticmaalo ee qaab dhismeedka, xirashada, iyo deegaanka daxalka leh.
1. adkaanta sare
Engegnaanta Rockwell waa HRA80-90, adayggu wuu ka hooseeyaa dheeman, aad uga badan iska caabbinta xidhashada birta u adkaysata iyo birta aan la kala qaadin.
2. caabbinta xidhashada heer sare ah
Waxaa lagu qiyaasaa machadyada cilmi-baarista xirfadleyda ah, caabbinta xirashada waxay u dhigantaa 266 jeer birta manganese.Gaoming cast iron 171.5 times, marka loo eego in ka badan toban sano ee sahanka macmiisha, isla xaaladaha shaqada, waxay kordhin kartaa nolosha adeegga qalabka ugu yaraan toban jeer ka badan.
3. Miisaan fudud
Cufnaanta 3.5g/cm3 waa kala badh birta, taas oo si weyn u yarayn karta culeyska qalabka.
| 技术参数(Qiyaamaha Farsamada) | ||
| 项目(Mashruuc) | 单位(Cutub) | 数值(Qiimaha tirada) |
| 材料(Qalab) |
| Al2O3>99.5% |
| 颜色(midabka) |
| 白色,象牙色(White,Ivory) |
| 密度(cufnaanta) | g/cm3 | 3.92 |
| 抗弯强度(Xoog dabacsan) | MPa | 350 |
| 抗压强度(Xoog isku xidhan) | MPa | 2,450 |
| 杨氏模量(Modulka dhalinyarada) | GPA | 360 |
| 抗冲击强度(Xoogga Saamaynta) | MPa m1/2 | 4-5 |
| 维泊尔系数(WeibullIskudubarid) | m | 10 |
| 维氏硬度(Vickers Hardness) | HV 0.5 | 1,800 |
| 热膨胀系数(Iskudarka Balaadhinta kulaylka) | 10-6K-1 | 8.2 |
| 导热系数(Habdhaqanka Kulaylka) | W/mk | 30 |
| 热震稳定性(Xasiloonida shoogga kulaylka) | ∆T °C | 220 |
| 最高使用温度(Isticmaalka ugu badanHeerkulka) | °C | 1,600 |
| 20°C体积电阻(20°C Cabbitaanka Mugga) | Ωcm | >1015 |
| 电介质强度(Xoogga Dielectric) | kV/mm | 17 |
| 介电常数(Dielectric Constant) | εr | 9.8 |
