Mowhiti Hiri Ukume Alumina Parakore-Teitei mō te Hiritanga Rūma Pāmahana-Teitei
Kua hangaia te mowhiti hiri uku a St.Cera hei whakakapi mō ngā mowhiti-O polymer i roto i ngā taiao tino kino ka pakaru ngā elastomers. He mea hanga mai i te 99.8% alumina parakore-teitei (Al₂O₃), ka whakamahia tēnei mowhiti hiri pakari i roto i ngā tono hiri pūmau — he mea hono tahi me te konganuku ngohengohe, te gasket graphite rānei — hei whakarato i te pupuri pono i te korehau, i te hau rānei i ngā pāmahana tae atu ki te 800°C me roto i ngā taiao plasma, matū rānei e kaha ana. Kāore he hau e puta mai ana i te rauemi, he kaha pēhi teitei (kaha piko o raro 361 MPa), me te koretake matū (ātete ki ngā halogens, waikawa, me ngā kawakore engari ko te HF). Mā ngā mata hiri kua oti te whakakī (papatahi ≤5 μm, taratara mata Ra ≤0.2 μm) ka whakarite kia kore e turuturu te pa ki ngā wāhanga konganuku, uku rānei.
Ngā Whakatakotoranga(i runga i te 99.8% Al₂O₃):
| Taonga | Uara |
| Rauemi | 99.8% Arumina (Ai) |
| Kiato | 3.93 karamu/cm³ |
| Te mimiti wai | 0% |
| Kaha Whakapiko | 361 MPa |
| Kaha Pēhanga (whakatau) | >2000 MPa |
| Te Pakari o Vickers | 16 GPa |
| Te Whānuitanga Wera (25–1000°C) | 7.2×10⁻⁶/℃ |
| Te pāmahana whakahaere mōrahi | 800°C (hau), 1600°C (kore e mahi) |
| Whakaotinga Mata (mata hiri) | Ra ≤0.2 μm (tāpirihia) |
| Papatahi (mō ia 25 mm) | ≤5 μm |
| Te Tere o te Tātari Hīriama | <1×10⁻¹⁰ Pa·m³/s (me te gasket tika) |
Ngā tono:
- · Ngā hiri tūmau o te rūma tukanga haurua-arataki (CVD, PVD, etch)
- · Ngā hiri tatau oumu pāmahana teitei
- · Ngā pāreti whāngai korehau
- · Ngā katinga o ngā oko tauhohenga matū
Tukanga Hanga:
Te pēhi isostatic → te sintering i te 1600°C → te whakapiri taha-rua tika hei whakatutuki i ngā mata hiri tino papatahi, maeneene → te chamfering taha → te horoi ultrasonic. Ka whakamātauhia te turuturu 100% o ia mowhiti i runga i te taputapu kite turuturu helium me te gasket whakarewa paerewa.
Mana Kounga:
- · Tirotiro i ngā āhuatanga CMM (ID, OD, matotoru, whakarara)
- · Ine ine mata mō te Ra me te ngaru
- · Te ine i te papatahi mā te whakamahi i te papatahi whatu
- · Whakamātautau turuturu o te hauhā (tikanga pēhanga-muri)
Ngā Painga i runga i ngā Mowhiti-O Polymer:
- · Ka mau ki te 800°C ki te <300°C mo FFKM
- · Kore hau e puta mai ana — kāore he poke o te taiao korehau
- · Ātete ki ngā matū katoa o te toto (hauora, māota, hāora)
- · Kāore he huinga pēhanga, he whakarerekētanga tuturu rānei
- · Te roa o te ratonga mutunga kore i roto i ngā taiao ma
Ngā Here (Ngā Kōrero Arohaehae):
- · Ehara i te mowhiti-O— he mowhiti uku mārō e hiahiatia ana he gasket ngohengohe (parahi, konumohe, karāwhata rānei) hei hiri.
- · Kāore e whakaae ki te nekehanga hihiri, ki te hē rānei o te tūnga o te flange.
- · He nui ake te utu tīmatanga i ngā mowhiti-O polymer, engari he roa ake te wā e ora ai, ka whakaitihia te utu o te mana pupuri.
- · Pakaru — kia tūpato te whakahaere; karohia te pānga ki te pito, te piko rānei.
Tuhipoka:Ko ngā raraunga i runga ake nei e whai pū ana i te ripanga āhuatanga Al₂O₃ kua tukuna. Kāore he raraunga mō ngā rauemi elastomeric i whakaratohia. He mowhiti hiri pumau tēnei hua, ehara i te mowhiti-O elastomeric. Tena koa whakaū mai mēnā e tutuki ana tēnei i ngā whakaritenga o tō tono.
