product introduction
White corundum is made of industrial alumina powder, which is smelted at a high temperature above 2000 degrees in an electric arc and then cooled. After crushing and shaping, magnetic separation to remove iron, and screening into various particle sizes, the texture is dense, the hardness is high, and the particles form sharp corners. It is suitable for the manufacture of ceramics, resin-bonded abrasives, grinding, polishing, sandblasting, precision casting (corundum for precision casting), etc., and can also be used to manufacture advanced refractory materials.
Physical properties:
The crystal |
Trigonal system |
|
True density |
3.90 g/cm³ |
|
Bulk density |
3.60g/cm³ |
|
hardness |
Knoop Hardness |
2000 - 2200 Kg/m㎡ |
Moh's hardness |
10 |
|
color |
White |
|
Calcined color dark blue |
||
melting point |
2250C |
|
Maximum operating temperature |
1900C |
|
Specific Heat (Cal/g. C) |
0.26 (20-90C) |
|
Thermal conductivity |
room temperature 900C |
|
(Cal/cm³. sec. C) |
||
Refractive index |
e=1.760 w=1.768(Na line) |
|
Resistivity |
30C 300C 900C 1600C(cm) |
|
10, 16, 10, 13, 10, 5, 10, 4 |
||
Linear expansion coefficient |
(7 - 9)*10^-6/K (0 - 1600 C) |
|
chemical properties |
Both sexes |
Reacts with acids Slightly corrosive in aqua regia and hydrofluoric acid |
Reacts with acids Slightly corrosive in aqua regia and hydrofluoric acid |
||
redox effect |
no |
Physical and chemical indicators:
use |
Specification |
Main chemical composition% |
|||
abrasive |
Al₂O₃ |
Na₂O |
Magnetic % |
SiO₂ |
|
Abrasives |
F12#—80# |
≥99.2 |
≤0.4 |
— |
≤0.03 |
90#—150# |
≥99.0 |
≤0.4 |
≤0.03 |
≤0.05 |
|
180#—240# |
≥98.5 |
≤0.4 |
— |
≤0.03 |
|
1#-63# |
≥99.3 |
≤0.4 |
≤0.03 |
≤0.05 |
|
refractory |
180#—0 |
≥99.3 |
≤0.4 |
≤0.06 |
≤0.05 |
Material |
200#-0 |
||||
320#-0 |
|||||
powder |
0-1mm |
8805;99 |
8804;0.4 |
8804;0.1 |
8804;0.02 |
1-3mm |
|||||
3-5mm |
|||||
5-8mm8-12mm |
Scope of application:
1. Surface processing: metal oxide layer, carbide black skin, metal or non-metal surface rust removal, such as gravity die-casting mold, rubber mold oxide or release agent removal, ceramic surface black spots, uranium color removal, painting Rebirth.
2. Beautification processing: all kinds of gold, K gold jewelry, extinction or matte treatment of precious metal products, matte processing of crystal, glass, corrugated, acrylic and other non-metallic surfaces, and can make the surface of processed objects into a metallic luster.
3. Etching processing: jade, crystal, agate, semi-precious stones, seals, elegant stones, antiques, marble tombstones, ceramics, wood, bamboo etc.
4. Pretreatment processing: Teflon (TEFLON), PU, rubber, plastic coating, rubber roller (ROLLER), electroplating, metal spray welding, titanium plating and other pretreatments to increase surface adhesion.
5. Burr processing: removal of burrs from bakelite, plastic, zinc, aluminum die-casting products, electronic parts, magnetic cores, etc.
6. Stress relief processing: stress relief processing for aerospace, national defense, and precision industry parts, rust removal, paint removal, matting, and renovation.
product advantages:
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 polishing operations;
4. Fast processing speed and high quality;
5. The amount of iron oxide contained is extremely low, suitable for sandblasting operations where iron residues are strictly prohibited;
6. After pickling step to remove impurities.
PTING Technology, founded in 2005, is a well-known domestic brand of surface treatment and environmental protection equipment system solutions. As China Sandblasted white corundum Suppliers and Wholesale Sandblasted white corundum Factory, it is committed to the R&D and manufacturing of process technology and equipment in the field of industrial surface treatment and environmental treatment. The enterprise has passed the ISO9001 quality system certification. The R&D and manufacturing base, with a building area of 25000 square meters, is located in Ningbo, China. With PTING's global overseas center in Singapore and more than 20 national offices, PTING Technology has provided surface treatment equipment, environmental protection equipment and process technology services to more than 2000 users worldwide. Users are widely distributed in: home appliance manufacturing, digital electronics, auto parts manufacturing, hardware and bathroom, new materials, new energy, rail transit, aerospace, petrochemical power, marine engineering, heavy industry equipment, agricultural machinery, engineering machinery Furniture manufacturing, etc.
Trust comes from strength.
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