Activated alumina manufacturers introduce the properties and uses of alumina

There are currently more than ten types of homogeneous and heterogeneous crystals known for alumina, among which - AL2O3, Beta-AL2O3, and ALA-AL2O3 (corundum) are the main three crystal forms. According to the different structures, the properties of alumina also vary, but alumina is completely converted into alpha alumina at high temperatures above 1300 degrees Celsius.

Resting angle: Resting angle refers to the inclination angle of materials naturally stacked on a smooth surface, which is an indicator of the flow performance of alumina. The smaller this angle, the better the fluidity of alumina. During the electrolysis process, it is more easily soluble in the electrolyte, which can better cover the electrolyte shell and have smaller flight losses.

Specific surface area: Specific surface area is an indicator of the chemical activity of alumina. The statistical method for this area is the sum of the external area per unit mass and the surface area of the internal holes. The larger the surface area, the better the chemical activity of alumina and the easier it is to dissolve.

Impressions: Impressions refer to the residual crystalline water content in alumina.

Activated alumina manufacturers introduce the properties and uses of alumina

Accumulated density: Accumulated density is also known as bulk density. Represents the mass of a unit volume item in its natural state. Generally speaking, aluminum oxide with low cumulative density has a fast dissolution rate of electrolytes.

Wear index: The wear index is also a strength indicator of alumina, and the lower the wear index, the greater the strength of alumina.

A-Al203 content: The degree of roasting of alumina is related to the content of Al2O3 in the finished alumina. The higher the content of Al2O3, the more sufficient the roasting is- A high content of Al2O3 will reduce the hygroscopicity of alumina, but the solubility of ALA-AL2O3 in electrolytes is worse than that of LON-A203.

Particle size: The particle size represents the thickness of alumina particles. If the particle size is too coarse, it will slow down the dissolution rate of alumina in the electrolyte, and even precipitate. If the particle size is too fine, it will fly in and cause losses.

The use of alumina

Aluminum oxide can be found in many fields such as electronics, petroleum, chemicals, refractory materials, ceramics, plastics, textiles, papermaking, pharmaceuticals, etc. Generally, it is aluminum oxide and aluminum hydroxide with special properties. But now more than 90% of aluminum oxide is used as a raw material for electrolytic smelting of aluminum.

The above is the relevant content organized by the active alumina manufacturer Zhongtianli for everyone. If you have any other questions about active alumina, alumina, high-purity alumina, etc., please feel free to come and inquire.