Alumina yumburawani nau'in kayan yumbu ne wanda ya ƙunshi aluminum oxide (AI2O3), wanda aka yi amfani dashi azaman insulating kayan kayan lantarki.Alumina yumburayana da kyawawa mai kyau, ƙarfin inji, da juriya mai zafi. Halayensa sun sa ya zama ɗaya daga cikin yumbu da aka fi amfani da shi a cikin tsari, sawa, da kuma gurɓataccen muhalli.
1. Babban taurin
Taurin Rockwell shine HRA80-90, taurin ya yi ƙasa da lu'u-lu'u, fiye da juriyar lalacewa ta ƙarfe da bakin karfe.
2. Kyakkyawan juriya na lalacewa
Ƙwararrun cibiyoyin bincike sun auna, juriyar sa ya yi daidai da sau 266 na ƙarfe na manganese. Gaoming simintin ƙarfe sau 171.5, bisa ga fiye da shekaru goma na binciken binciken abokin ciniki, a ƙarƙashin yanayin aiki iri ɗaya, na iya tsawaita rayuwar sabis na kayan aƙalla sau goma.
3. Hasken nauyi
Girman sa na 3.5g/cm3 shine kawai rabin na karfe, wanda zai iya rage yawan kayan aiki.
| 技术参数(Ma'auni na Fasaha) | ||
| 项目(Project) | 单位(Naúrar) | 数值(Kimar lamba) |
| 材料(Material) |
| Al2O3>99.5% |
| 颜色(Launi) |
| 白色,象牙色(Fara,Ivory) |
| 密度(Yawan yawa) | g/cm3 | 3.92 |
| 抗弯强度(Ƙarfin Ƙarfi) | MPa | 350 |
| 抗压强度(Ƙarfin Ƙarfi) | MPa | 2,450 |
| 杨氏模量(Modul na Matasa) | GPA | 360 |
| 抗冲击强度(Ƙarfin Tasiri) | MPa m1/2 | 4-5 |
| 维泊尔系数(WeibullCoefficient) | m | 10 |
| 维氏硬度(Vickers Hardness) | HV 0.5 | 1,800 |
| 热膨胀系数(Thermal Expansion Coefficient) | 10-6K-1 | 8.2 |
| 导热系数(Thermal Conductivity) | W/mk | 30 |
| 热震稳定性(Thermal Shock Stability) | ∆T °C | 220 |
| 最高使用温度(Mafi girman amfaniZazzabi) | °C | 1,600 |
| 20°C体积电阻(20°C Resistivity Volume) | Ωcm | >1015 |
| 电介质强度(Ƙarfin Dielectric) | kV/mm | 17 |
| 介电常数(Dielectric Constant) | εr | 9.8 |
