Aluminium oxide, tseem hu ua alumina, yog cov tshuaj sib xyaw ua ke ntawm txhuas thiab oxygen, nrog rau cov mis Al₂O₃. Cov khoom siv ntau yam no yog cov khoom dawb, crystalline uas ua lub luag haujlwm tseem ceeb hauv ntau qhov kev lag luam vim nws cov khoom tshwj xeeb.
Ib qho ntawm cov yam ntxwv tseem ceeb tshaj plaws ntawm aluminium oxide yog nws qhov tshwj xeeb hardness. Nws nyob qib 9 ntawm Mohs nplai, ua rau nws yog ib qho khoom siv nyuaj tshaj plaws. Qhov hardness no ua rau txhuas oxide zoo tagnrho abrasive, feem ntau siv hauv cov ntawv xuab zeb, sib tsoo lub log, thiab cov cuab yeej txiav. Nws cov kav ntev ua kom ntseeg tau tias nws tuaj yeem tiv taus cov ntawv thov nruj, ua rau nws nyiam xaiv hauv kev tsim khoom thiab kev tsim kho.
Ntxiv nrog rau nws qhov hardness, aluminium oxide kuj paub txog nws cov thermal thiab hluav taws xob zoo insulating zog. Qhov no ua rau nws yog ib qho tseem ceeb ntawm cov khoom siv hluav taws xob hauv kev lag luam hluav taws xob, qhov uas nws yog siv los ua ib qho insulator hauv capacitors thiab lwm yam khoom siv hluav taws xob. Tsis tas li ntawd, nws cov ntsiab lus melting siab (kwv yees li 2050 ° C lossis 3722 ° F) tso cai rau nws siv rau hauv cov ntawv thov kub, xws li cov ntaub ntawv refractory hauv qhov cub thiab qhov cub.
Aluminium oxide kuj tau siv dav hauv kev tsim cov txhuas hlau los ntawm cov txheej txheem Bayer, qhov twg bauxite ore yog refined kom rho tawm alumina. Cov txheej txheem no tseem ceeb heev rau kev lag luam txhuas, vim nws muab cov khoom siv raw uas xav tau rau kev tsim cov khoom hnyav thiab corrosion-resistant aluminium.
Ntxiv mus, aluminium oxide muaj cov ntawv thov hauv thaj chaw ntawm ceramics, qhov twg nws yog siv los tsim cov khoom siv ceramic siab heev uas tau siv ntau yam kev siv high-tech, suav nrog aerospace thiab biomedical li. Nws biocompatibility ua rau nws haum rau siv hauv kev cog hniav thiab prosthetics.
Nyob rau hauv xaus, aluminium oxide yog ib tug multifaceted compound nrog ntau yam kev siv nyob rau hauv ntau yam lag luam. Nws cov khoom tshwj xeeb, suav nrog hardness, thermal stability, thiab hluav taws xob rwb thaiv tsev, ua rau nws yog ib qho khoom siv tseem ceeb hauv kev siv tshuab niaj hnub thiab kev tsim khoom. Raws li kev lag luam txuas ntxiv mus, qhov tseem ceeb ntawm aluminium oxide yuav loj hlob, ntxiv dag zog rau nws lub luag haujlwm hauv kev tsim kho tshiab thiab kev loj hlob.
Post lub sij hawm: Apr-01-2025
