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Tabulated alumina

Description

Tabular alumina (also known as lamellar alumina) is a chemically pure aluminum oxide obtained by intensive sintering at temperatures above 1800 °C without the use of synthesizing additives. In finished form, it consists of grains or powder. Particle parameters depend on the specific fraction.

The material features closed porosity (over 2.56%), which ensures high thermal stability (about 97.8%) and broadens its application possibilities under the most severe thermal conditions.

Advantages

  • Chemical purity – the absence of synthesizing impurities enables use in processes where inertness and freedom from contamination are critical.
  • High mechanical strength and wear resistance – ensures long service life of refractory products and structures under abrasive loads.
  • Melting point up to 2040 °C – one of the highest among oxide materials, guaranteeing operability in extremely hot environments.
  • Thermal shock resistance – closed porosity and pure composition minimize cracking during rapid temperature changes.
  • Low shrinkage on heating – maintains product geometry during service, reducing the risk of lining deformation.

Applications

  • Raw material for the production of refractory concrete.
  • Base for corundum mixes used in metallurgy for shotcreting.
  • Casting in metallurgical production.
  • Manufacture of glass, cement, and steel.
  • Petrochemical and ceramic industries.
  • Industrial waste incineration.

FAQ

It is chemically pure aluminum oxide (Al₂O₃) manufactured by sintering at temperatures above 1800 °C without any synthesizing additives. The result is dense grains or powder with exceptionally high purity and thermal resistance.

Thanks to its closed porosity (over 2.56%) and high thermal stability (about 97.8%), it withstands sharp temperature fluctuations and mechanical loads very well. Combined with a melting point of up to 2040 °C and chemical inertness, this makes it an ideal component for demanding refractory concretes and corundum mixes.

The key difference lies in the production method. Tabular alumina is obtained by high-temperature sintering without additives, which gives it a platy (tabular) structure, very high density, wear resistance, and thermal shock resistance, unlike conventional sintered or fused alumina.