ʻO ka alumina ceramics kahi ʻano alumina (Al2O3) ma ke ʻano he kumu nui, ʻo ia kekahi o nā seramika kūikawā maʻamau, hiki ke hoʻohana nui ʻia i nā ʻenehana kiʻekiʻe a me nā ʻoihana ʻokiʻoki, e like me microelectronics, nuclear reactors, aerospace, magnetic. ʻO ka hoʻoheheʻe ʻana i ka mana wai, ka iwi a me nā hono a me nā ʻano ʻē aʻe, e ka makemake a me ke aloha o nā kānaka.
Loaʻa nā mea maikaʻi o nā mea alumina ceramic:
1, ʻo ka paʻakikī o nā alumina seramika he kiʻekiʻe loa, maikaʻi ke pale ʻana i ka lole.
2, alumina seramika i kemika corrosion kū'ē a me ka hooheheeia waiwai gula.
3, ʻo ka alumina ceramic material he insulation maikaʻi loa, ʻoi aku ka liʻiliʻi o ke alapine kiʻekiʻe akā he mau hiʻohiʻona insulation kiʻekiʻe kiʻekiʻe.
4, alumina ceramic mea i nā hiʻohiʻona o ka wela kū'ē, liʻiliʻi coefficient o thermal hoʻonui, nui mechanical ikaika a me ka maikai thermal conductivity.
5, maikaʻi ka pale ʻana o ka alumina ceramics, akā ʻo ka paʻakikī e like me ka corundum, a ʻo ke kūpaʻa ʻana o ka pae paʻakikī Mohs 9 ua hoʻohālikelike ʻia me nā alloys superhard.
6, ʻo nā alumina ceramics nā hiʻohiʻona o ka non-combustible, ka ʻōpala, ʻaʻole maʻalahi e hōʻino, ʻo ia nā mea kūlohelohe a me nā mea metala ʻaʻole hiki ke hoʻohālikelike i ka hana maikaʻi loa.
| Nā ʻāpana ʻenehana | ||
| Papahana | Unite | Waiwai helu |
| Mea waiwai | / | Al2O3 ＞99.5% |
| kalakala | / | Keokeo, Ivory |
| ʻO ka mānoanoa | g/cm3 | 3.92 |
| Ikaika Flexural | MPa | 350 |
| Ka ikaika hoʻopili | MPa | 2,450 |
| Opio Modulus | GPa | 360 |
| Ka ikaika o ka hopena | MPa m1/2 | 4-5 |
| Weibull Coefficient | m | 10 |
| ʻO Vickers Paʻakikī | HV 0.5 | 1,800 |
| (Ka helu hoʻonui wela) | 1n-5k-1 | 8.2 |
| ʻO ka hoʻoili wela | W/mK | 30 |
| Paʻa Paʻa Haʻalulu | △T°C | 220 |
| ʻO ka wela hoʻohana kiʻekiʻe loa | °C | 1,600 |
| 20°C Ke kū'ē leo | Ωcm | >1015 |
| Ka ikaika dielectric | kV/mm | 17 |
| Dielectric mau | εr | 9.8 |
