Sandblasted alumina

Aluminum oxide is a water-insoluble white amorphous powder with a common purity of 99.5% and 96%. Because of its high melting point, high hardness, insulation, and heat resistance, it has been widely used in aerospace, nuclear energy, energy, metallurgy, electronics, biochemistry, chemical engineering and other Projects. It is a very promising product.

Basic technical information:

Chinese name: aluminum oxide

English name: Aluminum oxide/Aluminum oxide

Other names: Al₂O₃, corundum, bauxite, alumina

Chemical formula: Al₂O₃

Molecular weight: 101.96

CAS accession number: 1344-28-1

EINECS accession number: 215-691-6

Melting point: 2030℃

Boiling point: 2980℃

True density: 3.97 g/cm³

Bulk density: 0.85 g/mL (325 mesh~0) 0.9 g/mL (120 mesh~325 mesh)

Crystal structure: Trigonal (hex)

Solubility: insoluble in water at room temperature

Conductivity: non-conductive at room temperature

Density: 3.5-3.9g/cm³

Appearance: white amorphous powder

Control: This product is not restricted

Properties: White solid insoluble in water, odorless, tasteless, extremely hard, easy to absorb moisture but not deliquescence (burned does not absorb moisture). Amphoteric oxide, soluble in inorganic acids and alkaline solutions, al insoluble in water and non-polar organic solvents; relative density (d204) 4.0; melting point 2050°C.

Storage: Keep in a sealed and dry place.

Uses: Abrasives, polishing agents, raw materials for smelting aluminum, refractory materials.

Quality inspection index

Dissolved matter in water% ≤0.5

Silicate (SiO₃) Pass

Alkali metal and alkaline earth metal% ≤0.50

Heavy metal (calculated as Pb>)% ≤0.005

Chloride (Cl)% ≤0.01

Sulfate (SO₄)% ≤0.05

Loss on ignition% ≤5.0

Iron (Fe)% ≤0.01

Safety

Ingestion: low, easy to cause senile dementia, damages children's intelligence

Inhalation: May cause irritation or local injury

Skin: low risk

Eyes: low risk

Unless otherwise stated, SI units and standard air and barometric pressures are used.

1. Abrasive alumina

Aluminum oxide is suitable for a variety of dry and wet processing processes, can polish the rough surface of any workpiece to fineness, and is one of the economical abrasives. Due to its natural crystal structure, it has high hardness and fast cutting performance. At the same time, they are often used as raw materials for bonded abrasives and coated abrasives.

This kind of sharp and water chestnut artificial synthetic abrasive has a hardness second only to diamond and is especially suitable for use when there are strict requirements on iron pollution. Due to its dense, sharp, water chestnut structure, it is one of the fastest-cutting abrasives available. Their alumina can be recycled many times, the number of cycles is related to the material grade and the specific process, and standard abrasive blasting equipment can be used.

Applicable industries: aerospace industry, automotive industry, consumer goods processing, foundry/die casting, OEM distributors, semiconductor industry, and other different fields.

Applicable process range: pretreatment before surface electroplating, painting, glazing, and PTFE coating; deburring and descaling of aluminum and alloy products; mold cleaning; pretreatment before metal sandblasting; dry grinding and wet grinding; Precision optical refraction; grinding of minerals, metals, glass, and crystals; glass engraving and paint additives.

Main application: It is used in the reinforcement and toughening of heat conduction, polishing, electroplating, catalyst, refractory materials, and other products, especially to improve the compactness, smoothness, cold and heat fatigue, fracture toughness, creep resistance, and polymer material products of ceramics The wear resistance is particularly remarkable.

2. Alumina sand

Alumina sand product description:

Features

1: Does not affect the color of the workpiece

2: It can be used for sandblasting in the process where iron powder residue is strictly prohibited

3: Micro powder grade is very suitable for wet sandblasting and grinding and polishing operations

4: Fast processing speed and high-quality

5: The amount of iron oxide contained is extremely low, which is very suitable for sandblasting operations where iron residues are strictly prohibited

6: After the pickling step to remove impurities, the purity of alumina is high

Use

1: Can be used in various sandblasting and lapping operations

2: Enhanced aesthetic processing of Polly or acrylic handicrafts

3: During the manufacture of TV screens

4: Cutting and sandblasting of silicon wafers

5: Cleaning and sandblasting of tooth grinding

6: Molding sand for precision casting

7: Additives for advanced refractories and other ceramics

3. High-purity alumina

High-purity alumina has the advantages of high purity and high density and can be used in the preparation of large-sized sapphire crystals and other products by the Kyropoulos method, guided-molding method, temperature gradient method, and pulling method. High-purity alumina can be used in electronics, chemicals, petroleum, Refractory materials, ceramics, glass, plastics, textiles, building materials, abrasives, paper and medicine, and many other fields.

The specific specifications of high-purity alumina are as follows:

Varieties of alumina mainly include: alumina for electrical fillers, α-alumina for electronic ceramics, α-alumina micro powder for stainless steel polishing, activated alumina for automobile exhaust purifiers, spherical high-purity alumina for luminescent materials, etc Transform a number of self-developed scientific research achievements into productivity, and the products are mainly used in Luminescent materials, single crystal, refractory materials, precision ceramics, polishing abrasives, high-voltage switches, catalysts and catalyst carriers and other industries.

1. Electrical filler alumina

Features: high whiteness, extremely low impurity content, reasonable particle size distribution, low electrical conductivity, excellent epoxy casting process performance.

Uses: It is suitable for the epoxy resin casting process in the fields of high-voltage and ultra-high-voltage electrical switches, cable accessories, transformers, etc., and plays the roles of reinforcement, insulation, and filling.

Performance:

Packing: The inner packing is made of double-layer polyethylene plastic film bags, and the outer packing is in waterproof cartons.

Standard: 25kg/piece

2. Aluminum oxide for electronic ceramics

Features: Colorless, odorless, white fine sand or powder, stable chemical properties, good sintering performance.

Uses: It is used as the raw material for the production of electronic ceramic substrates and other electronic ceramics by casting method.

Performance:

3. High-purity alumina

Features: high whiteness, no sulfur content, high bulk density, weak agglomeration; the obtained γ-alumina has high activity and good thermal shock resistance; the obtained α-alumina has a uniform primary particle size and no mesophase, The particle morphology is subspherical and spherical. It is suitable for industries such as transparent ceramics, single crystals, and luminescent materials that have extremely high requirements on the characteristics of alumina.

The main purpose:

• Luminescent material: used as the main raw material of rare earth three primary color phosphors, long afterglow phosphors, PDP phosphors, and LED phosphors;

• Transparent ceramics: used as fluorescent tubes for high-pressure sodium lamps, Programmable memory windows;

• Single crystal: used to make ruby, sapphire, yttrium aluminum garnet;

• High-strength high-alumina ceramics: used in the manufacture of integrated circuit substrates, cutting tools, and high-purity crucibles;

• Abrasives: Abrasives used in the manufacture of glass, metals, semiconductors, and plastics;

• Others: used as active coating, adsorbent, catalyst and catalyst carrier, vacuum coating, special glass raw material, composite material, resin filler, bioceramics, etc.

Performance: