Ngā Wāhanga Ukume Alumina Parakore-Teitei mō ngā Whakamahinga Ā-Haumaru me ngā Whakamahinga Ahumahi
E hanga ana a St.Cera i ngā wāhanga uku alumina (Al₂O₃) kua oti te mīhini kia rite ki ngā whakaritenga a te kiritaki. Mā te whakamahi i te alumina parakore 99.8%, ka tukuna e ēnei wāhanga he kaha piko tino pai (361 MPa), he pakeke teitei (16 GPa), me te kaha dielectric tino pai (15×10⁶ V/m). I hangaia mō ngā taputapu semiconductor, ngā huihuinga ātete-kakahu, ngā ārai hiko, me ngā taputapu pāmahana teitei, ka tukuna e te rauemi he mimiti wai tata ki te kore (0%) me te tauwehenga whānui wera o te 7.2×10⁻⁶/℃, e whakarite ana i te pumau o te taha i raro i ngā āhuatanga tino kino.
Ngā Whakatakotoranga(i runga i te 99.8% Al₂O₃):
Taonga | Uara |
| Rauemi | 99.8% Arumina (Ai) |
| Kiato | 3.93 karamu/cm³ |
| Kaha Whakapiko | 361 MPa |
| Te Pakari o te Whati | 3–4 MPa·m¹/² |
| Te Pakari o Vickers | 16 GPa |
| Te Tauwehenga o te Rangatahi | 380 GPa |
| Te Arahi Wera | 32 W/m·k |
| Te Whānuitanga Wera (25–1000°C) | 7.2×10⁻⁶/℃ |
| Pūmau Whakakore Hiko | 9.6 |
| Koki Ngaronga Hikohiko | 0.0001 |
| Kaha Whakakorehiko | 15×10⁶ V/m |
| Ātete Motuhake | >10¹⁴ Ω·cm |
| Te pāmahana whakahaere mōrahi | 1600°C |
Ngā tono:
- · Ngā arai rūma tukatuka haurua-arataki, ngā tirohanga, me ngā pereti tohatoha hau
- · Ngā pūkaha ātete-mau, ngā mowhiti hiri, me ngā pōro whāriki
- · Ngā ārai hiko ngaohiko teitei me ngā ārai mura
- · Ngā taputapu oumu, ngā tautoko whakamahana, me ngā ngongo tiaki i te thermocouple
Tukanga Hanga:
Te pēhi isostatic → te miihini matomato → te sintering i te 1600°C → te huri / te whakapiri tika CNC → te horoi ultrasonic → te tirotiro ahu 100% CMM. Ka tutukihia tonutia ngā āhua uaua, ngā pakitara angiangi (≥0.5 mm), me ngā manawanui kikī (ki raro ki te ±0.01 mm).
Mana Kounga:
Kua whakamanahia te ISO 9001:2015. Ka whakamatautauria ia puranga mō te kaha piko (piko 3), te pakeke (Vickers), te kaha dielectric (ASTM D149), me te ātete ki te ru wera (10 huringa, 25°C ↔ 1000°C). Kāore he pakaru, he maramara rānei e kitea ana i raro i te karuārai 20×.
Ngā Painga ki ngā Wāhanga Whakarewa, Whakapūmā rānei:
- · 3–5× mārō atu i te maitai kore waikura (16 GPa vs. ~2 GPa)
- · Kāore e ngoikore te matū — ātete ki ngā waikawa, ngā kawakore, me ngā halogen (haunga te HF)
- · Ārai hiko >10¹⁴ Ω·cm, e āhei ai te whakamahi i roto i ngā taiao ngaohiko teitei
- · Ratonga tonu tae atu ki te 1600°C, nui atu i ngā rohe o ngā konganuku, o ngā kirihou rānei
Whakaritenga:
Ka whakaaetia e mātou ngā tuhi a te kiritaki (te whakatakotoranga STEP/IGS) ā, ka tukuna hoki he tauira tere (2–3 wiki). Ka taea te tuku i ngā wāhanga hei mea kua whakakorikoria, kua hurihia, kua pania, kua orohia rānei (Ra ≤0.05 μm). Kei te wātea ngā momo porowhita taha, ngā pū kōhao, ngā kōhao miro, me ngā awaawa korehau.
Kia mōhio: Mō ngā tono e hiahia ana kia kaha ake te pakaru, whakaarohia ngā wāhanga zirconia (ZrO₂). Mō te kawe wera teitei rawa atu, tirohia ā mātou hua BeO₃, Si₃N₄ rānei. Ko ngā raraunga katoa i runga ake nei e whai ana i te ripanga āhuatanga Al₂O₃ kua tukuna (tohu 99.8%).
