Te Rākau Tauwāhi Ukume Alumina Tika mō ngā Taputapu Ārahi-Haumaru
Ko te tokotoko taunga uku a St.Cera he mea huri tika mai i te 99.8% alumina parakore-teitei (Al₂O₃). He tino pakari (16 GPa), he tino ātete ki te kakahu, me te pumau o ngā āhuatanga. Ko te diameter he piri ki te ±0.005 mm, te roa tae atu ki te 150 mm. Ka herea te mata o te tokotoko ki te Ra ≤0.2 μm kia maeneene te whakaurunga me te tango. Whakamahia hei pine whakarārangi, hei pine tākai, hei aukati rānei i roto i ngā taputapu tukatuka haurua-ira, ngā rīpene wafer, me ngā taputapu tirotiro.
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 Vickers | 16 GPa |
| Te Tauwehenga o te Rangatahi | 380 GPa |
| Awhe Diameter | 1–20 mm |
| Awhe Roa | 5–150 mm |
Ngā tono:
- · Ngā pine whakarārangi rīpene angiangi
- · Ngā pūahi arataki pine hiki
- · Ngā pou e tū ai ngā hononga
- · Ngā pou whakarārangi kāri tirotiro
Ngā Painga ki te Rino:
- · Kāore he aukume, ātete ki te waikura
- · Kāore he matūriki e puta mai i te kakahu
- · Ārai hiko (>10¹⁴ Ω·mm²/m)
Whakaritenga:
Ngā pito piko, ngā diameter o ngā kaupae, ngā kōhao miro, ngā kōtaha matamata ritenga rānei.
