Calcined Aluminum Oxide Powder: Properties and Applications
What Is Calcined Alumina?
Calcined alumina is a refined form of aluminum oxide (Al₂O₃) that undergoes a process known as calcination. During calcination, aluminum hydroxide or other aluminum compounds are heated at elevated temperatures, typically exceeding 800 degrees Celsius1. This thermal treatment transforms the raw material into a high-purity, crystalline form of alumina.Get more news about Calcined Aluminum Oxide Powder,you can vist our website!



Key Characteristics of Calcined Alumina
Crystal Shape: Calcined alumina grains exhibit a unique shape. Unlike fused aluminum oxide grains, which tend to be blocky, calcined alumina grains are composed of single platey crystals. Imagine a six-sided disk with a thickness approximately one-fifth of its diameter.
Purity: Calcined alumina is exceptionally pure, with a chemical composition closely resembling that of the original raw material. It contains minimal impurities, making it suitable for various applications.
Production Process
Raw Material Selection: High-quality aluminum hydroxide or other aluminum compounds serve as the starting point.
Calcination: The raw material is heated to high temperatures, causing it to lose water molecules and undergo structural changes. The resulting calcined alumina has improved hardness and stability.
Applications of Calcined Alumina
Abrasive Industry: Calcined alumina is used in precision grinding, lapping, and polishing processes. Its platey crystal shape contributes to efficient material removal and surface finishing.
Coated Abrasive Tapes: Due to its purity and consistent crystal structure, calcined alumina is an excellent choice for coated abrasive tapes. It ensures uniform performance during sanding and finishing operations.
Ceramics and Refractories: Calcined alumina serves as a raw material for ceramics, refractory bricks, and crucibles. Its high melting point and chemical stability make it ideal for high-temperature applications.
Electronics: Calcined alumina finds use in electronic components, insulators, and substrates due to its electrical insulation properties.
In summary, calcined alumina offers a balance of purity, crystal shape, and hardness, making it valuable across various industries. Whether in abrasives, ceramics, or electronics, this material plays a crucial role in enhancing performance and reliability.