Alumina is a white crystalline powder, alumina has been demonstrated α, β, γ, δ, and χ other 11 crystal.
of the formula
Chinese name: nano-alumina
English name: Aluminium oxide, nanometer
molecular weight: 101.96
the HS Code: 28182000
different method and technology of preparation of alumina obtained different molecule structures:
χ, β, η and γ-alumina, characterized by a porous, high dispersion, high activity, is activated alumina;
k, δ, θ-alumina;
α-Al2O3, low specific surface, high temperature inert, not activated alumina, almost no catalytic activity;
β-Al2O3, γ-Al2O3 in a large specific-surface-area, porosity high, heat high resistance, good moldability, strong surface acidity and fair surface alkalinity, is widely used as a catalyst and catalyst-support for new green chemical materials and the like.
The nano-alumina powder in the white fluffy state, crystal form γ-Al2O3.
Particle size 20 nm;
surface area≥230m2 / g.
Excellent particle-size-distribution, high purity, excellent dispersion, the high specific-surface, high temperature inert, high activity, is activated alumina; porosity; high hardness, dimension a good stability, can be widely used in plastics, rubber, ceramics, refractory materials toughening reinforcement, in particular, to improve the denseness of the ceramic, smoothness, thermal fatigue resistance, fracture toughness, creep properties and wear resistance of the polymer products is particularly significant. Excellent dispersing in a liquid solvent; the solvent is ethanol, propanol, propylene glycol, isopropyl alcohol, ethylene glycol mono butyl ether, acetone, methyl ethyl ketone, benzene, xylene, the without adding a dispersing agent, stirring sufficiently led to uniformly dispersed. Epoxy resin, plastic or the like, is added an excellent use.
1100 ℃ The compressive strength: 150
crystalline phase, boundary phase: good
the application range
the transparent ceramics: high-pressure sodium lamp, EP-ROM window.
Crystal, ruby, sapphire, yttrium aluminum garnet.
High strength alumina ceramic, Carbon substrates, packaging materials, cutting tools, high purity crucible, bobbin, bombarding a target, the furnace tube.
Precision polishing materials, glass products, metal products, semiconductor materials, plastic, tape, sanding belt.
Paint, rubber, plastic wear-resistant reinforcing material, advanced waterproof material.
Vapor deposition material, fluorescent material,special glass, resin material and a composite material.
Catalysts, catalytic carrier, analytical reagent.
Aerospace aircraft wing leading edge.
The recommended dosage is 1 to 5%, the user should test to determine the optimal amount depending on the system.
Production of aluminum alkoxides method.
Electronic ceramic sintering
Alumina bearing sintered,
wet sintered ceramic
Nano-aluminum oxide is highly dispersed nano-alumina, used as a flow aid, anti-blocking agent for PET film, and can also be used as a protective and adhesive layer in fluorescent tubes and light bulbs as well as environmentally friendly powder coatings. It is also used for the coating of high-quality inkjet paper, providing high gloss and excellent print quality for the paper. Increase the wear resistance of the paint; help the flow in the powder coating, improve the powder rate; in coil steel coating, can be used as a protective agent for heat and radiation; improve the powder charge. When the electrostatic powder is used for powder coating construction, the flowability of the powder can be improved, the positive electrification of the friction type powder can be improved, and the coating performance of the powder coating using the electrostatic friction method can also be improved.
CAS NO: 1344-28-1
Vapor deposition alumina
primary particle size
secondary particle size (dispersible soft agglomerates)
fluorescent lamp application
ultraviolet selective reflective material
mercury diffusion barrier layer
as the phosphor layer inorganic binder
Using alumina film improved fluorescent luminous efficiency, lumen life and
powder coatings applied
to reduce static charge generation
improving the powder
Flowability-improving an extruder processing in of
avoid moisture absorption, prolonged storage
stability and rheological properties increase corner cover on the
Nano-aluminum oxide is positively charged. For all powder coatings, it can be dry-blended before or after fine crushing. Due to its positive electrical properties, the nano-aluminum oxide is extremely suitable for electrostatic friction construction. In some cases, the nano-aluminum oxide can cause frictional electrostatic charges on products that cannot withstand friction and electrification. The mixing effect of nano-aluminum oxide can reduce the electrostatic charge that impedes the flow and helps the deposition of the powder during construction. The recommended addition ratio is 0.3 to 0.5% of the total formula. The unique benefits of nano-aluminum oxide are partly due to the control of the size and distribution of ultra-fine particles in their manufacturing process, as well as the charge on the surface of their own particles.