Gamma Aluminum Oxide: Properties and Applications

Gamma Aluminum Oxide is a white powder and like sand with good mobility soluble in acid and alkali solutions and strong absorption of water in the air and medium particle size. Gamma Aluminum Oxide used as a raw material for the production of new fungicides, Vb12 adsorbents, in the manufacture of pharmaceuticals and fillers active in color production as well as good raw materials for anhydrous aluminum chloride and catalyst. Used in pharmaceutical, chemical and other industries. In this article, we introduce gamma aluminum and its properties and applications.

Alpha and Gamma Aluminum Oxide

Alumina or aluminum oxide has two phases known as alpha (α) and gamma (ɣ). The major difference between these two phases is that the alpha phase is solid aluminum oxide whereas the gamma phase is porous aluminum, the thermal conductivity of the alpha oxide phase is higher. The alpha phase is denser than the gamma phase, and this is enough to make the conductance difference appropriate.

Properties of Gamma Aluminum Oxide Nanoparticles

The appearance of Gamma Aluminum Oxide is white crystal powder with uniform particle size. The nano powder of Gamma Aluminum Oxide is stable chemical property and has good crystal phase stability, difficult to dissolve in acid and alkali solution. Also it has good sintering activity. Nano Gamma Aluminum Oxide can be used as primary material for preparing high purity aluminum oxide powder. Another feature of Gamma Aluminum Oxide is high abrasive resistance and can be used as cutting tool. Some application of Gamma Aluminum Oxide are lists as follow:

1. Transparent ceramics: gamma alumina due to the special properties is used as High pressure sodium lamp and EP-ROM windows.
2. Cosmetic Filler: nano gamma alumina is used in cosmetic due to its shining effect.
3. Gamma alumina as a single crystal has applications in Jewelry, especially ruby
4. Advanced mechanical properties of gamma alumina make it a good candidate for cutting tools applications. Also, gamma alumina is used as Polishing materials and anti-wear tools.

Price 

Various companies around the world are producing gamma aluminum such as XIANGRUN in china or Merck in Germany. The price of gamma aluminum is depends to various factors such as particle size and shape (the more spherical it is the more expensive, also the nanoparticle powders are more expensive), the purity (the higher purity material is more expensive), the fluidity, the coating ability and so on. Hence, the price range for gamma aluminum ranges from $ 5 to $ 20 per kilogram.