Take you to understand the 4 major shapes of alumina
What is Aluminium Oxide?
Aluminum oxide is an amphoteric oxide of aluminum with the chemical formula Al2O3. It is also commonly referred to as alumina. Aluminum oxide is an electrical insulator but has a relatively high thermal conductivity (30 Wm−1 K−1) for a ceramic material.
The structure of the material determines the properties, and the properties determine the use. The morphology of the material is part of the structure. Therefore, the morphology of alumina has a great influence on its properties and application range.
Shapes of Aluminium Oxide
1. Spherical
Features of spherical Aluminium Oxide: Good fluidity and dispersibility, high tap density and bulk density, high thermal conductivity, high insulation, high hardness, high temperature resistance, wear resistance and corrosion resistance.
Application field of spherical Aluminium Oxide: Thermally conductive fillers, electronic ceramic materials, polishing materials, abrasives.
Market for Spherical Alumina: QYResearch research shows that the global spherical alumina market size will be about 1.5 billion yuan in 2021, and it is expected to reach 3.8 billion yuan in 2028, with a CAGR of 14.4% from 2022 to 2028.
2. Flaky
Features of flaky Aluminium Oxide: Flat plate structure, strong light reflection ability, good adsorption force, good shielding effect, uniform thickness, smooth surface, and large thickness-to-diameter ratio.
Application field of flaky Aluminium Oxide: Cutting materials, pearlescent pigments, cosmetics, functional ceramics, plastics, rubber, LED lighting.
Preparation method of flake alumina: 1. High temperature solid phase method: The high-temperature solid-phase method refers to adding a small amount of sintering aids such as titanium oxide, zirconium oxide, and aluminum fluoride to the precursor of alumina, and then placing it at a higher temperature for solid-state reaction and calcining to prepare flaky alumina. Way; 2. The molten salt method: The molten salt method is to dissolve the reaction product in the molten salt liquid phase at high temperature to form a saturated solution, and then slowly cool down or evaporate the solvent to form a supersaturated solution to precipitate crystal.
3. Hollow Spherical
Features of Hollow Spherical Aluminium Oxide: There are countless small holes on each particle of the hollow spherical shape, so that the particle has a relatively large specific surface area.
Application field of Hollow Spherical Aluminium Oxide: Catalyst carrier.
Preparation method of Hollow Spherical aluminum Oxide: Spray drying is one of the effective methods for preparing hollow spherical alumina powder. In the drying tower of spray drying, a slurry drop is sprayed out by the spray gun and falls at a certain height, and it is dried in the process. Due to the high temperature, the surface of the slurry dries quickly, and the adhesive on the surface and the micropowder particles continue to gasify rapidly to form the air pressure inside the ball. When the air pressure reaches a certain level, the gas bursts through the sphere from the weak point, causing a cavity to appear in the sphere.
4. Acicular and fibrous (alumina fibers)
Features of Acicular and fibrous (alumina fibers) Aluminium Oxide: Good high temperature resistance, wear resistance and oxidation resistance, low thermal conductivity, small thermal expansion coefficient, good shock resistance, high modulus, high plasticity, high toughness, high strength, high insulation and high dielectric constant.
Application field of Acicular and fibrous (alumina fibers) Aluminium Oxide: Insulation materials, fiber protection, adsorption filter materials, biomedical materials, reinforcement materials.
Preparation method of Acicular and fibrous (alumina fibers) aluminum Oxide: Sol-gel method, Buneimen method, melt spinning method, impregnation method, pre-polymerization method, slurry method.
Price of Aluminium Products
Usually the price will be affected by raw materials, market environment, research and development costs, etc. If you need to know the latest price of aluminum products, you can contact Staral’s customer service to answer your questions.
About Staral
Staral specializes in the deep processing business of aluminum products. Its main equipment include melting and holding furnaces from Switzerland GAUTSCHI, electro-magnetic stirring machines, refinery equipment and casting machines etc., 1+1+4 continuous hot rolling mill, 1+5 continuous hot rolling mill/three-stand and single-stand cold rolling mills with patent CVC flatness control imported from Germany SMS Group. Staral also placed large investments for high performance assisting equipment.
Staral's main products are series 1, 2, 3, 4, 5, 6, 7, 8, etc. The main products are ultra wide aluminum alloy plate, aluminum alloy medium plate, aluminum alloy heckered plate, aluminum alloy brazing plate, aluminum coil, aluminum tube, aluminum profile, aluminum circle, aluminum forges, etc.
Staral has a large number of 5 series aluminum alloy plates in stock, welcome to consult us and order.