What Is Tabular Alumina? Properties, Production Methods & Applications
Tabular alumina Introduction
Tabular alumina is a high-performance α-Al₂O₃ material known for its flat, plate-like structure and excellent physical and chemical properties. It combines the strengths of both micron and nano-sized powders, making it ideal for various industrial applications.
Key Features of Tabular Alumina
- High hardness and thermal stability
- Good dispersibility in water
- Smooth surface and high purity
- Excellent reflectivity and adhesion
- Strong surface activity and barrier effect
Production Methods
1. Hydrothermal Method
This method uses high-pressure vessels to form crystals under heat. It produces high-purity, thin alumina plates but requires long cycles and high energy.
2. Molten Salt Method
Combining alumina with molten salts at high temperatures allows atomic-level rearrangement and fast crystal growth. It’s efficient and widely used in industry.
3. Sol–Gel Method
This approach forms a precursor via hydrolysis and condensation and then calcines it to form α-Al₂O₃. It's equipment-friendly and low cost.
Applications of Tabular Alumina
1. Polishing and Abrasives
Tabular alumina offers better polishing performance and less scratching than traditional abrasives. Ideal for semiconductors, gemstones, and metals.
2. Pearlescent Pigments
As a base for pearlescent pigments, it provides bright color effects and higher purity than mica, delivering luxury finishes in cosmetics and coatings.
3. Inorganic Fillers
It improves strength, thermal conductivity, and crack resistance in ceramics, plastics, and composite materials.
4. Cosmetics
Used in powders and creams for its smoothness, adhesion, and safety. Enhances brightness and wear-resistance in makeup products.
5. Functional Coatings
Ideal for anti-radar, UV-blocking, and photocatalytic coatings. Also applied in solar panels and electronic materials.
Tabular alumina stands out as a multifunctional material across industries due to its unique structure and excellent performance. Its use is expanding in ceramics, electronics, pigments, and beyond.
