Aluminium oxide
Thepa: e tšoeu e tiileng e ke keng ea qhibiliha ka metsing, ha e na monko, e sa latsoeheng, e thata haholo, e bonolo ho monya mongobo ntle le ho thothomela (mongobo o chesitsoeng).Alumina ke amphoteric oxide e tloaelehileng (corundum e sebōpeho sa α 'me ke karolo ea sephutheloana se teteaneng sa hexagonal, ke motsoako oa inert, o qhibilihang hanyenyane ka acid le alkali corrosion resistance [1]), e qhibilihang ka inorganic acid le alkaline solutions, hoo e batlang e sa qhibilihe ka metsing. le li-solvents tse se nang polar;Boima ba kamano (d204) 4.0;Sebaka se qhibilihang: 2050 ℃.
Polokelo: Lula u tiisitsoe 'me u omme.
Lisebelisoa: E sebelisoa e le reagent ea analytical, organic solvent dehydration, adsorbent, organic reaction catalyst, abrasive, polishing agent, lisebelisoa tse tala bakeng sa ho qhibilihisa aluminium, refractory.
Lisebelisoa tse ka sehloohong
Alumina e na le likarolo tsa aluminium le oksijene.Haeba lisebelisoa tse tala tsa bauxite ka kalafo ea lik'hemik'hale, tlosa li-oxide tsa silicon, tšepe, titanium le lihlahisoa tse ling ke lisebelisoa tse tala tse hloekileng haholo tsa alumina, litaba tsa Al2O3 hangata li feta 99%.Karolo ea liminerale e entsoe ka 40% ~ 76% γ-Al2O3 le 24% ~ 60% α-Al2O3.γ-Al2O3 e fetoha α-Al2O3 ho 950 ~ 1200 ℃, ka ho fokotseha ho hoholo ha molumo.
aluminium oxide (aluminium oxide) ke mofuta oa inorganic, mofuta oa lik'hemik'hale Al2O3, ke mofuta oa metsoako e thata e phahameng, ntlha e qhibilihang ea 2054 ℃, ntlha e belang ea 2980 ℃, kristale ea ionized ka mocheso o phahameng, hangata e sebelisoang ha ho etsoa thepa ea refractory. .
Alumina ea indasteri e lokiselitsoe ke bauxite (Al2O3 · 3H2O) le diaspore.Bakeng sa Al2O3 e nang le tlhokahalo e phahameng ea bohloeki, hangata e lokiselitsoe ka mokhoa oa lik'hemik'hale.Al2O3 e na le li-heterocrystals tse ngata tsa homogenous, ho na le tse fetang 10 tse tsejoang, ho na le haholo-holo mefuta ea kristale ea 3, e leng α-Al2O3, β-Al2O3, γ-Al2O3.Har'a tsona, sebopeho le thepa li fapane, 'me α-Al2O3 e batla e fetoloa ka ho feletseng ho α-al2o3 ka mocheso o phahameng ka holimo ho 1300 ℃.
Lintho tsa 'mele
InChI = 1 / Al 2 o/rAlO ₂ / c2-1-3
Boima ba molek'hule: 101.96
Sebaka se qhibilihang: 2054 ℃
Sebaka se belang: 2980 ℃
Boima ba 'nete: 3.97g /cm3
Boikarabello ba ho paka bo hlephileng: 0.85 g/mL (325 mesh ~0) 0.9 g/mL (120 mesh ~325 mesh)
Sebopeho sa Crystal: Sisteme ea hex tripartite
Solubility: ha e qhibilihe ka metsing ka mocheso oa kamore
Motlakase: Ha ho conductivity ea motlakase mocheso oa kamore
Al₂O₃ ke kristale ea ionic
Alumina karolo e sebelisa ---- corundum ea maiketsetso
Corundum phofo e thata e ka sebelisoa e le abrasive, polishing phofo, mocheso o phahameng oa sintered alumina, o bitsoang corundum ea maiketsetso kapa lehakoe la maiketsetso, e ka etsoa ka li-bearings tsa mochini kapa lioache tse taemane.Alumina e boetse e sebelisoa e le thepa ea ho hanyetsa mocheso o phahameng, ho etsa litene tse refractory, crucible, porcelain, mahakoe a maiketsetso, alumina hape ke thepa e tala ea ho qhibiliha ha aluminium.Calcined aluminium hydroxide e ka hlahisa γ-.Gamma-al ₂O₃ (ka lebaka la ts'ebetso ea eona e matla ea papatso le ts'ebetso ea ts'ebetso) e ka sebelisoa e le adsorbent le catalyst.Karolo e ka sehloohong ea corundum, alpha-al ₂O₃.Kresetale e meraro e sebopehong sa moqomo kapa khoune.E na le khanya ea khalase kapa ea daemane.Boima ba 3.9 ~ 4.1g/cm3, boima ke 9, ntlha e qhibilihang ke 2000±15℃.Ha e qhibilihe ka metsing, 'me ha e qhibilihe ka har'a asiti le metheo.Ho hanyetsa mocheso o phahameng.Colourless transparent said white jade, e nang le trace ea trivalent chromium khubelu e tsejoang e le ruby;'Mala o moputsoa o nang le tse peli -, tse tharo - kapa tse' nè - tšepe ea valent e bitsoa safire;E na le karolo e nyane ea ferric oxide e bohlooho bo lefifi, 'mala o lefifi o bitsoang corundum powder.E ka sebelisoa e le li-bearings bakeng sa lisebelisoa tse nepahetseng, litaemane tsa lioache, mabili a silang, lipolisi, li-refractories le li-insulator tsa motlakase.Majoe a majoe a mebala e khanyang a sebelisetsoang mokhabiso.Synthetic ruby single crystal laser material.Ntle le liminerale tsa tlhaho, e ka etsoa ke hydrogen le oksijene lelakabe le qhibilihisang aluminium hydroxide.
Alumina ceramic
Alumina e arotsoe ka alumina ea calcined le alumina e tloaelehileng ea indasteri.Calcined alumina ke thepa e tala ea bohlokoa bakeng sa tlhahiso ea litene tsa khale, ha alumina ea indasteri e ka sebelisoa bakeng sa tlhahiso ea lejoe la microcrystalline.Likhanyang tsa setso, alumina hangata e sebelisoa joalo ka bosoeu.Tšebeliso ea alumina e boetse e eketseha selemo le selemo ha litene tsa khale le majoe a microcrystalline li ratoa ke 'maraka.
Ka hona, lirafshoa tsa alumina li ile tsa hlaha indastering ea ceramic - lirafshoa tsa alumina e ne e le mofuta oa thepa ea ceramic e nang le Al₂O₃ e le thepa ea mantlha e tala le corundum joalo ka karolo ea mantlha ea kristale.Ka lebaka la matla a eona a phahameng a mochini, boima bo phahameng, tahlehelo e phahameng ea dielectric, ho hanyetsa mocheso o phahameng oa mocheso, k'hemik'hale ea ho senya ha lik'hemik'hale le mekhoa e metle ea mocheso le melemo e meng ea ts'ebetso e phethahetseng ea tekheniki.
