Alumina ceramics yog ib hom alumina (Al2O3) ua cov khoom siv tseem ceeb ceramic, tam sim no yog ib qho ntawm cov khoom siv tshwj xeeb heev, tuaj yeem siv dav hauv high-tech thiab kev lag luam, xws li microelectronics, nuclear reactors, aerospace, magnetic. cov khoom siv hluav taws xob tsim hluav taws xob, cov pob txha pob txha thiab cov pob qij txha thiab lwm yam, los ntawm tib neeg txoj kev nyiam thiab kev hlub.
Alumina ceramic cov ntaub ntawv muaj qhov zoo hauv qab no:
1, lub hardness ntawm alumina ceramics yog siab heev, zoo hnav tsis kam.
2, alumina ceramics muaj tshuaj tiv thaiv corrosion thiab molten kub.
3, alumina ceramic cov ntaub ntawv muaj cov rwb thaiv tsev zoo heev, kev poob siab yog qhov me me tab sis zoo heev zaus rwb thaiv tsev yam ntxwv.
4, alumina ceramic khoom muaj cov yam ntxwv ntawm tshav kub tsis kam, me me coefficient ntawm thermal expansion, loj mechanical zog thiab zoo thermal conductivity.
5, kev hnav tsis kam ntawm alumina ceramics yog qhov zoo, tab sis qhov hardness yog tib yam li ntawm corundum, thiab hnav tsis kam ntawm Mohs hardness qib 9 yog piv rau cov khoom ntawm superhard alloys.
6, alumina ceramics muaj cov yam ntxwv uas tsis yog-combustible, xeb, tsis yooj yim rau kev puas tsuaj, uas yog lwm yam organic cov ntaub ntawv thiab cov ntaub ntawv hlau tsis tuaj yeem ua tau zoo heev.
| Technical Parameters | ||
| Qhov project | Chav tsev | Tus nqi |
| Khoom siv | / | Al2O3 txog 99.5% |
| Xim | / | Dawb, Ivory |
| Qhov ntom | g/cm3 | 3.92 ib |
| Flexural zog | MPa | 350 |
| Compressive zog | MPa | 2,450 ib |
| Young's Modulus | GPa | 360 |
| Kev cuam tshuam lub zog | MPa m1/2 | 4-5 |
| Weibull Coefficient | m | 10 |
| Vickers Hardness | HV 0.5 | 1,800 ib |
| (Thermal Expansion Coefficient) | 1 n-5k-1 | 8.2 |
| Thermal conductivity | W/mK | 30 |
| Thermal Shock Stability | △ T ° C | 220 |
| Kev siv kub siab tshaj plaws | °C | 1,600 ib |
| 20 ° C Volume Resistivity | Ω cm | > 1015 |
| Dielectric zog | kV / hli | 17 |
| Dielectric tsis tu ncua | ε r | 9.8 ib |
