Tabular alumina
Scope and purpose
Tabular alumina is the preferred component for the production of high-quality molded and unformed refractories. It is used in steelmaking, foundry, cement, petrochemical, ceramic industry and waste incinerators. Other areas of widespread consumption of this material include the manufacture of electrical insulators, furnace stock, catalyst carriers. Shredded tabular alumina is the best filler for composite materials on epoxy and other types of resins, which require high dielectric strength, thermal conductivity and wear resistance.
Characteristics
This is pure α-alumina obtained by intensive sintering at temperatures above 1800 ° C, without the use of sintering additives. It is characterized by large, well-developed crystals of α-alumina up to 200 μm long, which are in the form of a hexagonal plate. Low thermal expansion and high heat resistance are explained by the features of the microstructure: low open porosity and large crystal size with closed spherical pores formed during intense sintering.
Basic indicators
Material manufactured by ALMATIS (Germany)
| Chemical composition,% | All fractions1 | -45 μm Li | -45 μm STD | -20 μm |
| Al2O3 by difference | 99.5 | 99.5 | 99.1 | 99.3 |
| Na2O | ≤0.40 | ≤0.40 | ≤0.60 | ≤0.40 |
| SiO2 | ≤0.09 | ≤0.09 | ≤0.12 | ≤0.15 |
| Magnetic | ≤0.02 | ≤0.02 | ≤0.30 | ≤0.02 |
Physical properties
- Apparent density, g / cm3 > = 3.50
- Open porosity,% ≤ 5
- Water absorption,% ≤ 1,5
Benefits
- extremely high fire resistance;
- high mechanical strength, wear resistance;
- high chemical purity;
- excellent dielectric properties;
- good corrosion resistance in acidic and alkaline environments.
Concerning the acquisition tabular alumina and receipt of detailed advice on product properties, delivery conditions and the conclusion of the contract, please contact the managers:
+74872701242
zakaz@vulkantm.com