Products Description

White tabular alumina is a pure sintered alpha-alumina material that has been fully densified by rapid-sintering without the use of sintering aids at temperatures in excess of 1900°C.White Tabular Alumina, which is also known as tabular corundum, is a kind of sintered alumina. It is rapidly sintered under temperature 1900℃, which is slightly lower than the melting point of Al2O3 (2050℃).White tabular alumina has characteristic large, well developed hexagonal tablet shaped alpha-alumina crystals. The excellent thermal volume stability and thermal shock characteristics can be attributed to its specific microstructure: low open porosity and large crystals with closed spherical pores, which are entrapped upon re-crystallization during rapid sintering.

White tabular alumina grains to complete sintered recrystallized α-Al2O3, showing two-dimensional planar tabular shape and many integranular and intracrystalline circular closed pores microstructure characteristics.Ground Tabular is an excellent product to be used as a filler in epoxy or resin systems where high dielectric strength, thermal conductivity or abrasion resistance is desired.In order to improve the stability of product quality and application performance of tabular corundum, it is specially equipped with a perfect and advanced analysis system and quality control system to achieve full analysis of process indicators and full control of product quality.

Product Parameters

Item	Chemical composition (%)					Physical properties
Item	Al₂O₃	SiO₂	Fe₂O₃	K₂O	Na₂O	Bulk density (g/cm³)	Apparent porosity (%)
Tabular Alumina	≥99.2	≤0.1	≤0.04	≤0.01	≤0.26	≥3.5	≤5

Product size

We offer tabular alumina size as below:

Lumps size: 0-0.5mm, 0.5-1mm, 1-3mm, 3-5mm 5-8mm

Fine powder: 180mesh 200mesh 325mesh

Customized size is available

Product Advantages

1. High hardness: The hardness of white corundum is very high. Its hardness is second only to diamond, with a hardness of over 9.0. Therefore, white corundum has very good wear resistance, high strength, and is not easily damaged by external factors.

2. Good high temperature resistance: White corundum not only has high hardness, but also has excellent high temperature resistance. White corundum material can work stably in high temperature environments above 1200°C. It will not deform or crack due to high temperatures and is very suitable for use in high-temperature furnaces, high-temperature kilns and other fields.

Good corrosion resistance: White corundum has very good corrosion resistance and is not easily eroded by chemical substances. Its chemical properties are very stable, with excellent antioxidant and chemical stability properties, and it can work stably even in extreme environments such as acids and alkalis.

4. Uniform particle size and good crystallinity: The particle size of white corundum products is relatively uniform and has good crystallinity. These good properties prevent white corundum products from having too many burrs and pores, making their surfaces smooth and delicate. This can make white corundum products have a longer life and more stable performance.

5. Wide range of applications: White corundum has a wide range of applications. It can be used in high-temperature seals, wear-resistant products, corrosion-resistant products, high-temperature kiln refractory materials, ultra-fine grinder parts and other fields. Because white corundum has excellent properties in all aspects, it has very high practical value in actual work and is an important choice as a manufacturing material.