Aluminium oxyde

Ibisobanuro bigufi:

Alumina ni oxyde ihamye ya aluminium, formulaire ya chimique ni Al2O3.Yitwa kandi bauxite mu bucukuzi bw'amabuye y'agaciro, ububumbyi n'ibikoresho bya siyansi.

Ohereza imeri kuri twe

Ibicuruzwa birambuye

Ibicuruzwa

Ibyiza: umweru ukomeye udashobora gushonga mumazi, impumuro nziza, uburyohe, birakomeye cyane, byoroshye gukuramo ubuhehere utabanje kuvoma (ubuhehere bwatwitswe).Alumina ni okiside isanzwe ya amphoteric (corundum ifite α-shusho kandi ni iy'ibipfunyika bya hexagonal, ni ifumbire ya inert, igashonga gato muri acide no kurwanya ruswa ya alkali [1]), igashonga muri acide organic organique hamwe na alkaline, hafi yo kudashonga mumazi n'ibishishwa bidafite inkingi;Ubucucike bugereranijwe (d204) 4.0;Ingingo yo gushonga: 2050 ℃.

Ububiko: Komeza gufunga kandi byumye.

Imikoreshereze: Ikoreshwa nka analytike reagent, dehidrasi ya organic solvent, adsorbent, cataliste reaction, abrasive, polishing agent, ibikoresho fatizo byo gushonga aluminium, kwanga

Ibyingenzi

Alumina irimo ibintu bya aluminium na ogisijeni.Niba ibikoresho fatizo bya bauxite ukoresheje imiti, kura okiside ya silikoni, fer, titanium nibindi bicuruzwa nibikoresho byiza bya alumina, ibikoresho bya Al2O3 birenga 99%.Icyiciro cy'amabuye y'agaciro kigizwe na 40% ~ 76% γ-Al2O3 na 24% ~ 60% α-Al2O3.γ-Al2O3 ihinduka α-Al2O3 kuri 950 ~ 1200 ℃, hamwe no kugabanuka kwinshi.

oxyde ya aluminium (oxyde ya aluminium) ni ubwoko bwa organic organique, ubwoko bwa chimique Al2O3, ni ubwoko bwimvange ikomeye, gushonga kwa 2054 ℃, aho gutekera 2980 ℃, kristaliyoni ionisiyoneri mubushyuhe bwinshi, akenshi ikoreshwa mugukora ibikoresho bivunika .

Inganda alumina yateguwe na bauxite (Al2O3 · 3H2O) na diaspore.Kuri Al2O3 hamwe nibisabwa byera cyane, byateguwe muburyo bwa chimique.Al2O3 ifite heterocrystal nyinshi ya homogenous, hariho abantu barenga 10 bazwi, hariho ubwoko 3 bwa kristu, aribwo α-Al2O3, β-Al2O3, γ-Al2O3.Muri byo, imiterere n'imiterere biratandukanye, kandi α-Al2O3 yahinduwe rwose muri α-al2o3 ku bushyuhe buri hejuru ya 1300 ℃.

Imiterere yumubiri

InChI = 1 / Al 2 o / rAlO ₂ / c2-1-3

Uburemere bwa molekuline: 101.96

Ingingo yo gushonga: 2054 ℃

Ingingo yo guteka: 2980 ℃

Ubucucike nyabwo: 3.97g / cm3

Ubucucike buke: 0,85 g / mL (325 mesh ~ 0) 0,9 g / mL (120 mesh ~ 325 mesh)

Imiterere ya Crystal: sisitemu ya mpandeshatu

Gukemura: kudashonga mumazi mubushyuhe bwicyumba

Amashanyarazi: Nta mashanyarazi afite ubushyuhe bwicyumba

Al₂O₃ ni kristu ya ionic

Igice cya Alumina koresha ---- corundum artificiel

Ifu ya Corundum irashobora gukoreshwa nka prasive, ifu ya pisine, ubushyuhe bwo hejuru bwa alumina, bita corundum artificiel cyangwa amabuye y'agaciro, bishobora gukorwa mubikoresho bya mashini cyangwa amasaha muri diyama.Alumina ikoreshwa kandi nkibikoresho byo hejuru yubushyuhe bwo hejuru, gukora amatafari yangiritse, ingenzi, farufari, amabuye y'agaciro, alumina nayo nibikoresho fatizo byo gushonga aluminium.Kubara aluminium hydroxide irashobora gutanga γ-.Gamma-al ₂O₃ (bitewe na adsorption ikomeye nigikorwa cya catalitiki) irashobora gukoreshwa nka adsorbent na catalizator.Igice nyamukuru cya corundum, alpha-al ₂O₃.Ibice bitatu bya kirisiti muburyo bwa barriel cyangwa cone.Ifite ikirahure cyangwa diyama.Ubucucike ni 3.9 ~ 4.1g / cm3, ubukana ni 9, aho gushonga ni 2000 ± 15 ℃.Kudashonga mumazi, no kudashonga muri acide na base.Kurwanya ubushyuhe bwinshi.Ibara ridafite ibara rivuga jade yera, irimo ibimenyetso bya chromium itukura izwi nka rubini;Ibara ry'ubururu ririmo bibiri -, bitatu - cyangwa bine - icyuma cya valent cyitwa safiro;Harimo agace gato ka ferric oxyde yijimye yijimye, ibara ryijimye ryitwa ifu ya corundum.Irashobora gukoreshwa nkibikoresho byabigenewe, diyama kumasaha, gusya ibiziga, polish, inganda hamwe na insulator.Amabuye y'agaciro meza cyane akoreshwa mugushushanya.Sintetike ya ruby imwe ya kristu ya laser ibikoresho.Usibye imyunyu ngugu karemano, irashobora gukorwa na hydrogen na ogisijeni flame ishonga hydroxide ya aluminium.

Alumina ceramic

Alumina igabanijwemo alumina ibarwa na alumina isanzwe yinganda.Alumina ibarwa ni ibikoresho by'ibanze mu gukora amatafari ya kera, mu gihe alumina yo mu nganda ishobora gukoreshwa mu gukora amabuye ya microcrystalline.Muri glazes gakondo, alumina ikoreshwa kenshi nko kwera.Ikoreshwa rya alumina naryo ryiyongera uko umwaka utashye kuko amatafari ya kera n'amabuye ya microcrystalline atoneshwa nisoko.

Kubwibyo, alumina ceramics yagaragaye mu nganda zubutaka - alumina ceramics yari ubwoko bwibikoresho byubutaka hamwe na Al₂O₃ nkibikoresho nyamukuru na corundum nkicyiciro nyamukuru cya kristaline.Kubera imbaraga za mashini nyinshi, ubukana bwinshi, gutakaza ingufu za dielectric yumuriro mwinshi, kurwanya ubushyuhe bwo hejuru bwokwirinda ubushyuhe, kurwanya ruswa yimiti hamwe nubushuhe bwiza bwumuriro nibindi byiza byimikorere myiza yubuhanga.