Matailosi a Ceramic Osatopa ndi Osawonongeka a Alumina Osagwira Ntchito

Matailosi a alumina ceramic osatha kuvalandi zinthu zogwiritsidwa ntchito ndi ceramic zopangidwa ndi aluminiyamu oxide (Al₂O₃) yoyera kwambiri kudzera mu kukanikiza ndi kutentha kwambiri. Kuchuluka kwa Al₂O₃ nthawi zambiri kumakhala 92%, 95%, kapena 99%, ndi kuchulukana kuyambira 3.60 g/cm³ mpaka 3.90 g/cm³ komanso kuyamwa madzi pansi pa 0.01%. Zinthuzi zimakhala ndi kuuma kwakukulu komanso kukhazikika kwa mankhwala, koyenera kugwiritsidwa ntchito m'mafakitale okhudzana ndi kugwedezeka, kukangana kotsetsereka, ndi zinthu zowononga.

Magawo ogwiritsira ntchito: Kulimba kwa Mohs kwa 9, kulimba kwa Rockwell HRA 85-90, ndi kukana kutha kwa chitsulo cha kaboni nthawi 20-30 kuposa chitsulo cha kaboni wamba (kutha kwa voliyumu ≤0.05 cm³ pa mayeso a ASTM G65 ouma a rabara la mchenga). Mphamvu yopindika imafika 250-350 MPa, kutentha kwa mpweya pafupifupi 25-30 W/(m·K), ndipo kutentha kwa ntchito kumayambira -50 °C mpaka 1200 °C (kutengera mtundu wake). Deta iyi imatsimikizira kudalirika kwa nthawi yayitali pansi pa kutentha kwambiri komanso kutentha kwambiri.

Chogulitsachi chimagwiritsidwa ntchito kwambiri poteteza kuwonongeka kwa zipangizo zofunika kwambiri m'mafakitale a simenti, zitsulo, magetsi, migodi, ndi malasha, monga masamba ogawa, ma chute, ma pipe elbows, ma cyclone, ndi ma hopper linings. Njira zoyikira zimaphatikizapo epoxy resin bonding, bolting, kapena welding (pogwiritsa ntchito matailosi a ceramic obooledwa kale ophatikizidwa ndi mbale za rabara/chitsulo). Kukhuthala kokhazikika kumayambira pa 5 mm mpaka 25 mm; kukula kwa matailosi wamba kumaphatikizapo 10 mm × 10 mm, 20 mm × 20 mm, ndi 50 mm × 50 mm mawonekedwe a sikweya kapena a hexagonal kuti kudula ndi kukonza zikhale zosavuta pamalopo.

Kugwiritsa ntchito matailosi a alumina osatha ntchito kumawonjezera nthawi yogwiritsira ntchito zida ndipo kumachepetsa nthawi yogwira ntchito yokonza. Deta ya m'munda ikuwonetsa kuti pansi pa mikhalidwe yofanana yogwirira ntchito, zipilala za ceramic zimakhala nthawi yayitali nthawi 3-8 kuposa zitsulo za manganese kapena zitsulo zosatha ntchito. Chogulitsachi sichili ndi maginito, sichimalimbana ndi dzimbiri la asidi/alkali (kupatula hydrofluoric acid ndi alkali yotentha kwambiri), ndipo sichimaipitsa zinthu. Kusankha kuyenera kudziwa kuchuluka kwa Al₂O₃ ndi makulidwe a matailosi kutengera ngodya yeniyeni ya impact, kukula kwa tinthu, ndi kutentha kuti pakhale mgwirizano pakati pa magwiridwe antchito ndi mtengo.