Vim lawv cov khoom tshwj xeeb physicochemical, ntau hom alumina muaj cov ntawv tshwj xeeb hauv kev lag luam thiab qib siab -tech fields. Cov ntawv thov tseem ceeb yog: -Al₂O₃ rau cov khoom siv thiab kev ua haujlwm, -Al₂O₃ feem ntau siv hauv catalysis thiab lub zog, thiab -Al₂O₃ tshwj xeeb rau ion- ua cov ntawv thov.
-Al₂O₃ (Corundum): Lub hauv paus pob zeb ntawm cov khoom siv ruaj khov heev.
Raws li cov ntaub ntawv siv lead ua ruaj khov tshaj plaws, -Al₂O₃, nrog nws qhov siab melting point (2050 degree), siab hardness (Mohs 9), thiab zoo heev tshuaj inertness thiab hluav taws xob rwb thaiv tsev, yog dav siv nyob rau hauv daim ntawv thov uas yuav tsum tau heev durability thiab stability:
Refractory thiab hnav- cov ntaub ntawv resistant: Siv nyob rau hauv kev tsim cov high-kub kiln hauv ob sab phlu, crucibles, refractory bricks, thiab lwm yam., ua kom muaj kev ruaj ntseg ntawm siab - kub industries xws li hlau thiab iav.
High-kev ua tau zoo ceramics: Siv nyob rau hauv cov khoom siv hluav taws xob ceramic xws li cov khoom siv hluav taws xob sib txuas, cov hluav taws xob hluav taws xob, thiab cov khoom siv hluav taws xob siab -voltage insulators, suav txog 90% ntawm cov khoom siv hluav taws xob ceramic substrate. Biomedical Implants: High-purity -Al₂O₃ ceramics, vim lawv cov biocompatibility zoo thiab tsis tshua muaj hnav, yog siv rau cov pob qij txha thiab cov hniav cog.
Abrasives thiab Polishing: Dawb corundum ( -Al₂O₃) yog cov khoom siv tseem ceeb rau kev tsim cov log sib tsoo thiab cov hmoov abrasive, siv rau kev ua cov hlau thiab cov khoom siv hluav taws xob.
Gemstones thiab Kho kom zoo nkauj: Ntuj los yog hluavtaws rubies thiab sapphires yog -Al₂O₃ crystals uas muaj cov kab ntawm cov khoom xws li chromium thiab hlau.
-Al₂O₃ (Activated Alumina): High Specific Surface Area Drives Catalysis thiab Adsorption
-Al₂O₃ yog ib qho ntxeem tau, metastable crystalline daim ntawv nrog rau qhov chaw siab heev (txog 586.9 m² / g). Nws muaj qhov muaj zog acidity, zoo dispersibility, thiab thermal stability (800-1000 degree), ua rau nws cov khoom siv tseem ceeb hauv cov teb ntawm catalysis thiab adsorption:
Kev them nyiaj yug Catalyst: Hauv automotive tso zis purification, loading precious hlau xws li platinum thiab palladium txhim kho CO conversion efficiency rau 99.2% thiab NOx conversion efficiency rau 97.5%.
Ntsiab Additives rau Lithium{0}}Ion roj teeb:
Separator Txheej: Nano- -Al₂O₃ coatings nce electrolyte wetting ceev los ntawm 3 zaug, txhim kho cov roj teeb ua haujlwm tau zoo.
Cathode Txheej: Doping nrog 5wt% -Al₂O₃ nce lub peev xwm tuav LiCoO₂ ntawm 78% mus rau 92% tom qab 200 cycles ntawm 55℃. Cov khoom siv hluav taws xob hloov pauv hloov pauv: Ib txheej txheej 20nm tuab tuaj yeem cuam tshuam lithium dendrite kev loj hlob txog li 95%.
Adsorption thiab lub cev qhuav dej: Nws thaj chaw loj tshwj xeeb ua rau nws muaj txiaj ntsig zoo rau lub cev qhuav dej ntawm petrochemical cracking gas, txo kev siv zog ntau dua 30%.
Precision polishing: Siv rau polishing optical iav thiab semiconductor wafers, txo qhov roughness ntawm 0.1nm RMS.
