Alumina Ceramic Yosagwira Ntchito: Katundu, Kupanga, ndi Kugwiritsa Ntchito

Alumina ceramic yosagwira ntchitondi zinthu zapamwamba zadothi zopangidwa ndi ceramic zopangidwa ndi alumina yoyera kwambiri (Al₂O₃). Chakhala chinthu chofunikira kwambiri pothana ndi kuwonongeka kwakukulu, dzimbiri, komanso kutentha kwambiri chifukwa cha kuuma kwake kwapadera, kukana kuvala, komanso kukhazikika kwa mankhwala. Poyerekeza ndi zinthu zachikhalidwe zosagwira kuvala zachitsulo, chimawonjezera kwambiri nthawi yogwiritsira ntchito zida ndikuchepetsa kuchuluka kwa kukonza ndi ndalama m'magawo ambiri amafakitale, zomwe zimagwira ntchito ngati yankho lofunikira kwambiri m'mafakitale kuyambira mphamvu ndi zitsulo mpaka kupanga zinthu zapamwamba.

Kugwira ntchito kwake kwapadera kumadalira deta yeniyeni ya thupi ndi mankhwala. Kulimba kwa alumina ceramic ya Rockwell (HRA) kumatha kufika 80-90, ndi mphamvu yopondereza yoposa 850 MPa. Mayeso aukadaulo akuwonetsa kuti kukana kwake kutopa ndi kuwirikiza 266 kuposa chitsulo cha manganese ndi kuwirikiza 171.5 kuposa chitsulo chapamwamba cha chromium. Ponena za kukana kutentha, kutentha kwake kwa nthawi yayitali kumatha kufika 300°C, ndipo kumatha kupirira dzimbiri la asidi ndi alkali mkati mwa pH ya 3 mpaka 12. Makhalidwe amenewa amamuthandiza kugwira ntchito mokhazikika m'malo omwe amakhudzidwa kwambiri, omwe amawonongeka kwambiri, komanso omwe amawonongeka, mwachitsanzo, kukulitsa moyo wa ntchito ya mapaipi onyamula ufa wa malasha ndi nthawi zoposa 10.

Kuchita bwino kwa alumina ceramic yosatha kutopa kumapindula ndi kuwongolera bwino njira yonse kuyambira pa zopangira mpaka kusungunula. Choyamba, ufa wa alumina wosaphika umaphwanyidwa bwino kwambiri, ndipo kukula kwa tinthu nthawi zambiri kumayendetsedwa pansi pa 1 micron, kuonetsetsa kuti tinthu tating'onoting'ono timagawidwa bwino komanso mofanana. Njira zazikulu zopangira zimaphatikizapo kukanikiza kouma ndi kukanikiza kwa isostatic, komwe kumapatsa thupi lobiriwira kuchulukana kofanana. Pomaliza, thupi lobiriwira limasunthidwa pafupifupi 1700°C, ndikupanga kapangidwe kolimba ka microcrystalline, komwe kuchuluka kwa zinthu kumafika pa 95%. Ma composite formulations, monga kuwonjezera zirconia (ZrO₂), amatha kupititsa patsogolo kukana kwake komanso kulimba kwake.

Zinthuzi zimagwiritsidwa ntchito kwambiri m'magawo osiyanasiyana a mafakitale. M'mafakitale opanga mphamvu ndi kuteteza chilengedwe, zimagwiritsidwa ntchito m'mapaipi a ufa wa malasha a zomera zamagetsi zotentha, komanso m'magulu ndi ma cone a mphepo yamkuntho a zomera za simenti, zomwe zimawonjezera moyo wa zida ndi nthawi 3 mpaka 5. M'mafakitale opanga zitsulo ndi migodi, ma ceramic liners omwe amaikidwa m'mapaipi opangira malasha a blast furnace ndi mapaipi ochotsa fumbi amalimbana bwino ndi zinthu zowononga kwambiri monga ufa wa chitsulo, zomwe zimachepetsa ndalama zokonzera pachaka ndi 60%. Kuphatikiza apo, alumina ceramics yoyera kwambiri (monga 99.7%) imagwiritsidwanso ntchito m'mafakitale apamwamba monga kupukuta kwa semiconductor wafer.