Black Fused Alumina

Alumină neagră topită

ISO-9001-2000
SGS
O PERTURBARE

Alumină neagră topită

Black fused alumina is a highly durable and versatile abrasive material that has a wide range of applications in various industries. Its unique combination of physical and chemical properties makes it suitable for abrasive blasting, surface preparation, polishing, refractory materials, and anti-skid flooring applications. Its high durability, low dust generation, versatility, and cost-effectiveness make it an ideal choice for industrial processes.

Black Fused Alumina
  • Al2O3: 95.5% – 97.5%
  • SiO₂: 1.0% – 1.5%
  • Fe₂O₃: 0.5% – 2.0%
  • Deja2O: ≤0,1%

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Dimensiunea particulelor

Black Fused Alumina Particle Size
  • Dimensiunea obișnuită a particulelor materialelor refractare: 0-1, 1-3, 3-5, 5-8mm, 100, 200, 325 plasă
  • Dimensiunea obișnuită a particulelor abrazivelor: 12, 14, 16, 24, 30, 36, 46, 60, 80, 100, 120, 150, 180, 200, 220, 240, 280, 325 plasă.
  • Micropulbere comună pentru lustruire și șlefuire: 400, 600, 800, 1000, 1500, 2000, 3000 plasă
  • Granularitatea produsului poate fi procesată în funcție de granularitatea cerută de utilizator.

Caracteristici

  • Crystal Structure
    Black fused alumina has a hexagonal crystal structure and is composed of aluminum, iron, and oxygen. The iron content gives the material its black color.
  • Hardness and Toughness
    Black fused alumina has a high hardness rating of 9 on the Mohs scale, making it a suitable material for grinding and polishing hard surfaces. At the same time, the material exhibits excellent toughness, which allows it to withstand high impact and pressure without breaking.
  • Melting Point
    Black fused alumina has a high melting point of around 2,050°C, making it a heat-resistant material suitable for high-temperature applications.

Aplicații

  • Abrasive Blasting
    Black fused alumina is a popular abrasive material used in abrasive blasting. Its high hardness and toughness make it effective in removing rust, paint, and other surface coatings from metal surfaces. It is also used for surface preparation prior to painting or coating, as it creates a roughened surface that promotes adhesion.
  • Surface Preparation
    In addition to abrasive blasting, black fused alumina is also used for surface preparation in various industries. It is used to roughen and clean surfaces of different materials, inclusiv metalele, ceramică, and composites. Surface preparation with black fused alumina improves the adhesion and bonding of subsequent coatings, such as paints and sealants.
  • Polishing and Lapping
    Black fused alumina is also used as an abrasive material for polishing and lapping applications. Its high hardness and uniform particle size make it effective in achieving a smooth and uniform surface finish on metals, glass, and ceramics. It is commonly used in the production of optical lenses, electronic components, and precision parts.
  • Refractory Materials
    Black fused alumina is a refractory material with excellent high-temperature stability and chemical resistance. It is used in the production of refractory materials such as bricks, castables, and monolithic refractories. These materials are used in the construction of furnaces, cuptoare, și alte aplicații la temperatură înaltă.
  • Anti-Skid Flooring
    Black fused alumina is also used in the production of anti-skid flooring materials. Its high hardness and durability make it an ideal material for creating slip-resistant surfaces in various applications, including industrial flooring, stairs, and walkways.

Parametrii

ItemIndicators
ColorBlack
CrystalTrigonal system
Hardness(mohs)>=9.0
Melting Point(℃)2050
The Maximum Temperature1850
True Density(g/cm3)>=3.50
Linear expansion coefficient(0-1600℃)7-9

FAQ

20 Tonă

While both are alumina-based abrasives, Black Fused Alumina is tougher, less friable, and more heat resistant than White Fused Alumina. Alumină albă topită, on the other hand, is purer and has a higher hardness, making it better suited for precision applications and high-quality surface finishes.

White fused alumina (WFA), brown fused alumina (BFA), and black fused alumina (BLFA) are all types of fused alumina, which is a type of abrasive material made by melting alumina (Al2O3) and then solidifying it into blocks or grains.

The main difference between these three types of fused alumina is their color, which is a result of differences in the manufacturing process and the impurities present in the raw materials used.

White fused alumina is made from high-quality alumina powder and is the purest form of fused alumina, with a white color and high hardness. It is commonly used in applications where a high level of purity is required, such as in the production of semiconductor wafers, precision casting, and high-end abrasives.

Brown fused alumina is made from bauxite, iron filings, and anthracite coal, and has a brown color. It has a lower purity than white fused alumina but is tougher and more durable, making it suitable for applications such as grinding and cutting.

Black fused alumina is made from bauxite and iron filings and has a black color. It is less pure than both white and brown fused alumina and is typically used in applications such as sandblasting, polishing, and surface preparation.

Pentru a alege abrazivul cu carbură de siliciu potrivit, luați în considerare factori precum materialul pe care se lucrează, finisajul dorit, durata de viata abraziva, și echipamentul utilizat. În general, materialele mai dure necesită granule mai fine, în timp ce materialele mai moi pot fi prelucrate cu granule mai grosiere.

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