Awọn ohun elo alumina jẹ iru alumina (Al2O3) gẹgẹbi ohun elo seramiki akọkọ, lọwọlọwọ jẹ ọkan ninu awọn ohun elo pataki ti o wọpọ pupọ, o le ṣee lo ni lilo pupọ ni imọ-ẹrọ giga ati awọn ile-iṣẹ gige-eti, gẹgẹbi microelectronics, awọn olupilẹṣẹ iparun, afẹfẹ, oofa iran agbara ito, egungun atọwọda ati awọn isẹpo atọwọda ati awọn aaye miiran, nipasẹ ojurere ati ifẹ eniyan.
Awọn ohun elo seramiki aluminiomu ni awọn anfani wọnyi:
1, líle ti awọn ohun elo alumina ga pupọ, resistance yiya ti o dara.
2, alumina seramiki ni kemikali ipata resistance ati didà goolu-ini.
3, ohun elo seramiki alumina ni idabobo ti o dara julọ, pipadanu igbohunsafẹfẹ giga jẹ iwọn kekere ṣugbọn awọn abuda idabobo igbohunsafẹfẹ giga ti o dara.
4, ohun elo seramiki alumina ni awọn abuda kan ti resistance ooru, olusọdipúpọ kekere ti imugboroosi igbona, agbara ẹrọ ti o tobi ati adaṣe igbona ti o dara.
5, resistance resistance ti awọn ohun elo alumina alumina jẹ dara, ṣugbọn lile jẹ kanna bi ti corundum, ati wiwọ resistance ti Mohs hardness level 9 jẹ afiwera si ti awọn alloy superhard.
6, alumina ceramics ni awọn abuda ti kii-combustible, ipata, ko rọrun lati bajẹ, eyiti o jẹ awọn ohun elo Organic miiran ati awọn ohun elo irin ko le baramu iṣẹ ti o dara julọ.
| Imọ paramita | ||
| Ise agbese | Ẹyọ | Iye iye |
| Ohun elo | / | Al2O3 ：99.5% |
| Àwọ̀ | / | Funfun, ehin-erin |
| iwuwo | g/cm3 | 3.92 |
| Agbara Flexural | MPa | 350 |
| Agbara titẹ | MPa | 2.450 |
| Modulu odo | GPA | 360 |
| Agbara Ipa | MPa m1/2 | 4-5 |
| Weibull olùsọdipúpọ | m | 10 |
| Vickers Lile | HV 0.5 | 1.800 |
| (Imugboroosi Gbona) | 1n-5k-1 | 8.2 |
| Gbona Conductivity | W/mK | 30 |
| Gbona mọnamọna Iduroṣinṣin | △T°C | 220 |
| O pọju Lilo otutu | °C | 1.600 |
| 20 ° C Iwọn Resistivity | Ωcm | > 1015 |
| Dielectric Agbara | kV/mm | 17 |
| Dielectric Constant | êr | 9.8 |
