Are you looking for the right Fused Alumina for your project? With so many types and grades available, it can be challenging to choose the right one. In this guide, we’ll take a closer look at the differences between White, Black, and Brown Fused Alumina and help you choose the right one for your needs.

Difference

Color

The most obvious difference between white, black, and brown fused alumina is their color. White fused alumina has a white or off-white color, while black fused alumina is black or dark gray, and brown fused alumina is brown or tan. This color difference is due to the impurities present in the alumina before it is melted and fused.

Hardness

Another important property of fused alumina is its hardness. White fused alumina is the hardest of the three, followed by brown and black fused alumina. This makes white fused alumina ideal for applications that require a high level of abrasion resistance, such as cutting tools and grinding wheels.

Crystalline Structure

The crystalline structure of fused alumina also varies depending on the type. White fused alumina has a hexagonal crystal structure, while brown fused alumina has a trigonal crystal structure. Black fused alumina has an amorphous structure, which means that it does not have a well-defined crystal structure.

Manufacturing Process

The manufacturing process for fused alumina is similar for all three types. Alumina is first processed to remove any impurities and then melted at high temperatures. The melted alumina is then cooled down and solidified to form a crystalline structure. The difference between the three types of fused alumina lies in the type and amount of impurities present in the starting material.

White fused alumina is made from pure alumina, while brown fused alumina contains impurities such as titanium oxide and iron oxide. Black fused alumina is made from a mixture of alumina, iron filings, and coal.

Applications

• White fused alumina is used primarily in high-performance grinding wheels and cutting tools. It is also used in sandblasting applications and as a refractory material.
• Brown fused alumina is used in grinding wheels, sandpaper, and other abrasive products. It is also used in refractory materials, such as furnace linings and kiln furniture.
• Black fused alumina is mainly used in sandblasting applications and in the production of resin-bonded grinding wheels.

Which one is right for you?

The choice of Fused Alumina depends on several factors, including the application, the material being worked on, and the desired finish.

• If you need a high purity material for cutting and polishing, White Fused Alumina is the best choice.
• If you need a tougher material for surface preparation, sandblasting, and polishing, Black Fused Alumina is the right choice.
• If you need a moderate hardness material for grinding, cutting, and polishing, Brown Fused Alumina is ideal.

The choice of Fused Alumina depends on the application and the desired outcome. By understanding the differences between White, Black, and Brown Fused Alumina, you can choose the right one for your needs. Contact us today to find out more about these materials and how they can benefit your project.

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