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What is γ-Alumina?

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Author : Trunnano
Update time : 2022-09-16 15:40:11
What is γ-Alumina?
Alumina with γ-type crystal form is γ-alumina.
γ-type alumina is insoluble in water and can dissolve in strong acid or alkali solution. When heated to 1200 ℃, γ-type alumina is completely transformed into α-type alumina. γ-type alumina is a porous substance with an internal surface area of several hundred square meters per gram and high activity and strong adsorption capacity. Industrial products are often colorless or pink cylindrical particles with good pressure resistance.
 

γ-Alumina Properties
The particle size of γ-phase nano-alumina is smaller than that of 20nm, with uniform particle size distribution, high purity, excellent dispersion, high specific surface, high temperature-resistant inertia and high activity, so it belongs to active alumina, porosity, high hardness and good dimensional stability.
It can be widely used in the reinforcement and toughening of all kinds of plastics, rubber, ceramics, refractories and other products, especially in improving the compactness, finish, cold and hot fatigue, fracture toughness, creep resistance and wear resistance of polymer materials. It is easy to disperse in solvent water; it can be uniformly dispersed in ethanol, propanol, propylene glycol, isopropanol, ethylene glycol monobutyl ether, acetone, butanone, benzene and xylene without adding dispersant. It is often added to epoxy resin, plastics, etc.
 

What is γ-Alumina used for?
Coatings: porcelain film coatings, wear-resistant coatings and plasma spraying.
Ceramics: transparent ceramics, bioceramics and alumina ceramics.
Petrochemical industry: catalyst, catalyst carrier and automobile exhaust purification material.
Polishing materials: submicron / nanometer grinding materials, single crystal silicon wafer grinding, fine polishing materials.
Lighting: long afterglow phosphor raw material and rare earth tricolor phosphor raw material, high pressure sodium lamp transparent tube, LED lamp and so on.
Electronics: integrated circuit substrate, single crystal materials and far-infrared materials.
Cosmetics: cosmetic fillers.
Inorganic membrane materials.
 
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