Arasındakı fərq white corundum powder and alumina powder

White corundum powder and alumina powder have the same appearance and similar names. Many people want to clarify the difference between them. The following Qianjiaxin Refractories will distinguish it from its own composition.

1. Ağ korund tozu

(1) Crystal form: trigonal crystal system;

(2) Density: 3.90 g/cm3;

(3) Hardness: Knoop hardness 2000-2200Kg/mm2, Mohs hardness 9.0;

(4) Ərimə nöqtəsi: 2250C;

(5) Maximum operating temperature: 1900C;

(6) Specific heat (Cal/g.C): 0.26 (20-90C);

(7) İstilik keçiriciliyi: otaq temperaturunda 900C (Cal/sm3.sec.C);

(8) Kırılma əmsalı: e=1.760 w=1.768 (Na xətti);

(9) Coefficient of linear expansion: (7-9)*10^-6/K(0-1600C).

2. Alüminium oksidi tozu

(1) Appearance: white powder, crystalline phase γ phase;

(2) Average particle size (nm): 20±5;

(3) Content %: greater than 99.9%;

(4) Melting point: 2010℃-2050℃;

(5) Qaynama nöqtəsi: 2980 ℃;

(6) Relative density (water = 1): 3.97-4.0;

(7) Rəng: kalsinasiyadan sonra ağ, tünd göy.

White corundum powder can be used as contact media, insulators and precision casting sand, etc. Alumina powder ze can be used in heat conduction, polishing, electroplating, catalyst, etc.