Aluminium oxide, tseem hu ua alumina, yog ib qho tshuaj sib xyaw ua ke ntawm txhuas thiab oxygen, nrog rau cov mis Al₂O₃. Cov khoom siv tau ntau yam no yog cov khoom dawb, crystalline uas ua lub luag haujlwm tseem ceeb hauv ntau yam lag luam vim nws cov yam ntxwv tshwj xeeb.
Ib qho ntawm cov yam ntxwv tseem ceeb tshaj plaws ntawm txhuas oxide yog nws qhov nyuaj tshwj xeeb. Nws qib 9 ntawm Mohs nplai, ua rau nws yog ib qho ntawm cov khoom siv nyuaj tshaj plaws muaj. Qhov nyuaj no ua rau txhuas oxide yog cov khoom siv abrasive zoo tagnrho, feem ntau siv rau hauv cov ntawv xuab zeb, cov log sib tsoo, thiab cov cuab yeej txiav. Nws qhov ruaj khov ua kom ntseeg tau tias nws tuaj yeem tiv taus cov ntawv thov hnyav, ua rau nws yog qhov kev xaiv nyiam hauv kev tsim khoom thiab kev tsim kho.
Ntxiv rau nws qhov nyuaj, txhuas oxide kuj paub txog nws cov khoom zoo heev rau kev rwb thaiv tsev thermal thiab hluav taws xob. Qhov no ua rau nws yog ib qho khoom siv tseem ceeb hauv kev lag luam hluav taws xob, qhov twg nws siv los ua cov insulator hauv capacitors thiab lwm yam khoom siv hluav taws xob. Ntxiv mus, nws qhov kub siab melting (kwv yees li 2050 ° C lossis 3722 ° F) tso cai rau nws siv rau hauv cov ntawv thov kub siab, xws li cov ntaub ntawv refractory hauv cov cub tawg thiab cov kilns.
Aluminium oxide kuj tseem siv dav hauv kev tsim cov hlau txhuas los ntawm Bayer txheej txheem, qhov twg bauxite ore raug ua kom huv si kom rho tawm alumina. Cov txheej txheem no tseem ceeb rau kev lag luam txhuas, vim nws muab cov khoom siv raw uas xav tau rau kev tsim cov khoom txhuas uas tsis hnyav thiab tiv taus xeb.
Ntxiv mus, txhuas oxide muaj daim ntawv thov hauv thaj chaw ntawm cov khoom siv ceramics, qhov twg nws yog siv los tsim cov khoom siv ceramic siab heev uas siv rau hauv ntau yam kev siv thev naus laus zis siab, suav nrog aerospace thiab biomedical devices. Nws cov biocompatibility ua rau nws tsim nyog rau kev siv hauv kev cog hniav thiab prosthetics.
Xaus lus, txhuas oxide yog ib qho khoom sib xyaw ua ke uas muaj ntau yam kev siv thoob plaws ntau yam lag luam. Nws cov yam ntxwv tshwj xeeb, suav nrog qhov nyuaj, kev ruaj khov thermal, thiab kev rwb thaiv hluav taws xob, ua rau nws yog ib qho khoom siv tseem ceeb hauv cov thev naus laus zis niaj hnub thiab cov txheej txheem tsim khoom. Thaum cov lag luam txuas ntxiv hloov zuj zus, qhov tseem ceeb ntawm txhuas oxide yuav loj hlob, ua rau nws lub luag haujlwm hauv kev tsim kho tshiab thiab kev txhim kho.
Lub sijhawm tshaj tawm: Plaub Hlis-01-2025
