Calcined alumina, also known as aluminum oxide, is a white crystalline powder that is made by heating aluminum hydroxide to high temperatures, typically around 1200-1500°C. The process of calcination removes the water and other impurities from the aluminum hydroxide, resulting in a pure form of aluminum oxide.
Calcined alumina has a wide range of applications, thanks to its excellent physical and chemical properties. It is a highly refractory material, meaning it can withstand high temperatures without melting or degrading. This makes it a valuable ingredient in the production of refractory materials, including ceramics, glass, and cement.
In addition to its high refractoriness, calcined alumina also has good mechanical strength and excellent electrical insulation properties, making it a useful material in the production of electrical insulators, high-performance coatings, and abrasives.
Calcined alumina is available in a variety of grades, each with specific properties tailored to different applications. For example, fine-grained calcined alumina is often used in polishing and lapping applications, while coarser grades are used as abrasives or as a filler in refractory materials.
Overall, calcined alumina is a versatile material that offers excellent thermal, mechanical, and electrical properties, making it a valuable component in a wide range of industrial applications.
|Purity||95% 99% 99.7%|
At CG Material, we offer high quality Calcined Alumina with exceptional purity and precision in terms of size. Our products range in diameter from 1mm to 100mm and have a purity level of up to 99.8%. We also provide custom manufacturing options for special shapes to meet specific needs.
Calcined Alumina Specifications
|Na2O (%)||0.4 – 0.9||0.6 – 1.1||≤0.5||≤0.5||≤0.5||≤0.5||≤0.5|
|Specific Surface Area (m2/g)||0.15 0.35||0.6 – 0.11||0.2 – 0.5||0.3 – 0.7||0.3 – 0.7||0.3 – 0.7||0.5 – 0.9|
|Particle Size Distribution d50 (µm)||≈70||7 – 10||≈80||12 – 28||10 – 20||6 – 10||6 – 8|
|Particle Size Distribution d90 (µm)||≈120||15 – 30||≈200||70 – 100||50 – 80||10 – 60||44489|
|Primary Crystal Size (µm)||≈15||≈7||≈6||≈6||≈6||≈6||≈6|
|Oil Absorption (ml/100g)||≈60||≈18||≈43||≈30||≈25||≈20||≈20|
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Calcined Alumina Applications
It is widely used in electronics, chemicals, petroleum, refractories, ceramics, glass, plastics, textiles, building materials, abrasives, paper and medicine, and many other fields.
We handle our products with care to ensure they remain in their original condition during storage and transportation and to preserve their quality.