Alumina, kapena Aluminium Oxide, imatha kupangidwa moyera kwambiri. Magiredi wamba omwe amagwiritsidwa ntchito m'mafakitale amakono ndi 99.5% mpaka 99.9% okhala ndi zowonjezera zomwe zimapangidwa kuti ziwonjezere mphamvu. Njira zosiyanasiyana zopangira ceramic zingagwiritsidwe ntchito kuphatikiza makina kapena mawonekedwe a ukonde kuti apange kukula ndi mawonekedwe osiyanasiyana a chinthucho.
Ma ceramic a Al2O3 ali ndi ubwino wotsatira:
1. Kulimba kwambiri (kulimba kwa MOHS ndi 9) komanso kukana kukalamba.
2. Mphamvu yabwino ya makina. Mphamvu yopindika imatha kufika 300~500MPa.
3. Kukana kutentha kwambiri. Kutentha kwake kosalekeza kumatha kufika 1000℃.
4. Kulimba kwambiri komanso mphamvu zabwino zotetezera magetsi. Makamaka ndi kulimba bwino kwambiri kutentha (kulimba kwa chipinda ndi kutentha ndi 1015Ω•cm) komanso kulimba kwa magetsi (mphamvu yotetezera kutentha ndi 15kV/mm).
5. Kukhazikika bwino kwa mankhwala. Sichigwirizana ndi sulfuric acid, hydrochloric acid, nitric acid ndi hydrofluoric acid.
6. Kukana dzimbiri kutentha kwambiri. Kumatha kukana kuwonongeka kwa zitsulo zosungunuka monga Be, Sr, Ni, Al, V, Ta, Mn, Fe ndi Co.
Chifukwa chake, alumina ceramics imagwiritsidwa ntchito kwambiri m'mafakitale amakono. Amagwiritsidwa ntchito makamaka m'mafakitale opanga zinthu zamagetsi, mafakitale amakina, malo otentha kwambiri, makampani opanga mankhwala, makampani opanga kuwala, nsalu ndi zina.
Alumina ndi ceramic yomwe imagwiritsidwa ntchito kwambiri muzinthu zotsatirazi:
✔ zotetezera magetsi, zida zotetezera dzimbiri za ma laser a gasi, zida zogwiritsira ntchito semiconductor processing (monga chuck, end effector, seal ring)
✔ zotetezera magetsi zamachubu a ma elekitironi.
✔ zida zomangira zinthu zokhala ndi vacuum yambiri komanso cryogenic, zida zoyezera mphamvu ya nyukiliya, ndi zida zogwiritsidwa ntchito kutentha kwambiri.
✔ zida zotetezera dzimbiri, pisitoni ya mapampu, ma valve ndi njira zoyezera, ma valve a magazi otengedwa.
✔ machubu a thermocouple, zotetezera magetsi, zopukutira, ndi maupangiri a ulusi.
Nthawi yotumizira: Julayi-14-2023