Brown corundum (xim av aluminium oxide)yog bauxite, coke (anthracite) raws li cov ntaub ntawv tseem ceeb, nyob rau hauv lub arc rauv los ntawm kub smelting, nrog nws ua los ntawm cov cuab yeej abrasive, haum rau kev sib tsoo high tensile hlau, xws li ntau yam steel hlau, malleable cam khwb cia hlau, nyuaj bronze. , thiab lwm yam., kuj tuaj yeem tsim cov ntaub ntawv qib siab refractory.
vaj tse
Lub cev muaj zog: triangular crystal system
Tshuaj lom neeg: ob leeg poj niam
Cov tshuaj tiv thaiv acid: me ntsis corroded hauv aqua regia thiab hydrofluoric acid
Cov tshuaj tiv thaiv nrog alkali: tsuas yog reacts me ntsis nrog muaj zog alkali kub tov
REDOX effect: Tsis yog
Qhov ceev: 3.90g / cm3
Hardness: Nupe hardness {{0}}Kg/mm2, Mohs hardness 9.0
Xim: tsaus xim av, tsaus xiav tom qab calcination
Melting point: 2250C
Ua haujlwm kub siab tshaj plaws: 1900C
Cov cua kub tshwj xeeb: (Cal/gC) 0.26 (20-90C)
Thermal conductivity Chav kub 900C
(Cal / cm3.sec.C)
Refractive index: e=1.760w=1.768(Naline)
Qhov siab: 30C300C900C1600C (cm)
Linear expansion coefficient: 7-9(0-1600C)
Qib ntawm xim av corundum
Lub ntsiab tseem ceeb ntawm cov xim av corundum yog alumina, thiab kev faib tawm yog txawv los ntawm cov ntsiab lus ntawm txhuas, thiab cov ntsiab lus ntawm cov aluminium qis dua, qhov qis dua qhov hardness.
Cov khoom me me yog tsim raws li cov qauv thoob ntiaj teb thiab cov qauv hauv tebchaws, thiab tuaj yeem ua tiav raws li cov neeg siv khoom xav tau. Qhov loj me me yog F4 ~ F320, thiab nws cov tshuaj muaj pes tsawg leeg sib txawv nyob ntawm seb qhov loj me me. Qhov zoo tshaj plaws feature yog hais tias cov siv lead ua loj me me thiab cuam tshuam resistant, vim hais tias ntawm crushing txheej txheem nrog lub automill, cov hais yog feem ntau spherical hais, qhov saum npoo yog qhuav thiab huv si, thiab nws yog ib qho yooj yim los mus ua ke nrog cov binder.
