Aluminium oxide
Properties: chena yakasimba isinganyunguriki mumvura, isinganhuhwi, isinganakidze, yakaoma kwazvo, iri nyore kutora mwando pasina kunyorova (yakatsva mwando).Alumina inofanana neamphoteric oxide (corundum yakaita α uye ndeye densiest hexagonal packing, iinert compound, inonyungudika zvishoma mu acid uye alkali corrosion resistance [1]), inonyungudika mu inorganic acid uye alkaline solutions, inenge isinganyungudike mumvura. uye non-polar organic solvents;Hukama density (d204) 4.0;Nzvimbo yekunyungudika: 2050 ℃.
Kuchengeta: Ramba wakavharwa uye wakaoma.
Zvishandiso: Inoshandiswa seanalytical reagent, organic solvent dehydration, adsorbent, organic reaction catalyst, abrasive, polishing agent, mbishi zvinhu zvekunyungudutsa aluminium, refractory.
Main ingredients
Alumina ine zvinhu zvealuminium uye oksijeni.Kana iyo bauxite mbishi zvinhu kuburikidza nemakemikari kurapwa, bvisa maokisi esilicon, simbi, titanium uye zvimwe zvigadzirwa zvakachena kwazvo alumina mbishi, zvinyorwa zveAl2O3 zvinowanzopfuura 99%.Iyo mineral phase inoumbwa ne40% ~ 76% γ-Al2O3 uye 24% ~ 60% α-Al2O3.γ-Al2O3 inoshandura kuita α-Al2O3 pa950 ~ 1200 ℃, ine vhoriyamu yakakura shrinkage.
aluminium oxide (aluminium oxide) imhando ye inorganic, chemical type Al2O3, imhando yemhando dzakaoma zvakanyanya, inonyunguduka inosvika 2054 ℃, 2980 ℃, ionized crystal pakupisa kwepamusoro, inowanzoshandiswa mukugadzira zvinhu zvinoramba. .
Industrial alumina inogadzirwa ne bauxite (Al2O3 · 3H2O) uye diaspore.Kune Al2O3 ine yakanyanya kuchena chinodiwa, inowanzogadzirirwa nemakemikari nzira.Al2O3 ine akawanda homogenous heterocrystals, kune anopfuura 10 anozivikanwa, pane kunyanya 3 makristasi marudzi, anoti α-Al2O3, β-Al2O3, γ-Al2O3.Pakati pavo, chimiro uye zvivakwa zvakasiyana, uye iyo α-Al2O3 inenge yakanyatso kushandurwa kuita α-al2o3 pakupisa kwakanyanya pamusoro pe1300 ℃.
Zvinhu zvemuviri
InChI = 1 / Al 2 o/rAlO ₂ / c2-1-3
Molecular uremu: 101.96
Nzvimbo yakanyungudika: 2054 ℃
Nzvimbo yekubikira: 2980 ℃
Chokwadi density: 3.97g/cm3
Yakasununguka kurongedza density: 0.85 g/mL (325 mesh ~0) 0.9 g/mL (120 mesh ~325 mesh)
Crystal chimiro: hex tripartite system
Solubility: isinganyungudika mumvura pane tembiricha yekamuri
Magetsi conductivity: Hapana magetsi conductivity pakamuri tembiricha
Al₂O₃ ionic crystal
Alumina chikamu shandisa ---- artificial corundum
Corundum poda kuomarara inogona kushandiswa seabrasive, polishing poda, yakakwira tembiricha sintered alumina, inonzi artificial corundum kana gemstone yekugadzira, inogona kugadzirwa nemakanika mabhengi kana wachi mudhaimani.Alumina inoshandiswawo seyakakwira tembiricha inodzivirira zvinhu, kugadzira zvidhinha zvinoramba, crucible, porcelain, matombo ekugadzira, alumina zvakare ndiyo yakasvibiswa yealuminium kunyungudutswa.Calcined aluminium hydroxide inogona kuburitsa γ-.Gamma-al ₂O₃ (nekuda kwekushambadza kwayo kwakasimba uye chiitiko chinokonzeresa) inogona kushandiswa seyakashambadza uye inokonzeresa.Chinhu chikuru che corundum, alpha-al ₂O₃.Ikristaro yetatu muchimiro chebhari kana koni.Iine girazi rinopenya kana diamond luster.Density i3.9 ~ 4.1g/cm3, kuomarara i9, panonyungudika i2000±15℃.Isinganyunguriki mumvura, uye isinganyunguriki muasidhi nemabhesi.High tembiricha kuramba.Colorless transparent akati jena jena, rine trace of trivalent chromium red inozivikanwa se ruby;Rudzi rwebhuruu rune maviri -, matatu - kana mana - valent iron inonzi sapphire;Iine hushoma hweferric oxide yakasviba grey, yakasviba ruvara inonzi corundum hupfu.Inogona kushandiswa semabhengi ezviridzwa, madhaimondi ewachi, mavhiri ekukuya, polishes, refractories uye magetsi insulators.Matombo ane mavara akajeka anoshandiswa pakushongedza.Synthetic ruby single crystal laser zvinhu.Pamusoro pezvicherwa zvechisikigo, inogona kugadzirwa nehydrogen uye oksijeni murazvo unonyungudutsa aluminium hydroxide.
Alumina ceramic
Alumina yakakamurwa kuita calcined alumina uye yakajairwa maindasitiri alumina.Calcined alumina chinhu chakakosha pakugadzira zvidhinha zvekare, nepo maindasitiri alumina anogona kushandiswa kugadzira microcrystalline dombo.Muchinyakare glazes, alumina inowanzoshandiswa sekuchena.Kushandiswa kwealumina kuri kuwedzerawo gore negore sezvo zvidhinha zvekare uye matombo emicrocrystalline anofarirwa nemusika.
Naizvozvo, alumina ceramics yakabuda muindasitiri yeceramic - alumina ceramics yaive rudzi rweceramic zvinhu neAl₂O₃ seyakanyanya mbishi zvinhu uye corundum sechikamu chikuru chekristaro.Nekuda kwesimba rayo remuchina, kuomarara kwepamusoro, kuderera kwedielectric kurasikirwa, kupisa kwakanyanya kwekudzivirira, kemikari inodzivirira kupisa uye yakanaka yekupisa conductivity uye zvimwe zvakanakira zvehunyanzvi hwekuita tekinoroji.
