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Aluminum oxide is one of the hardest materials on the Mohs scale. It is also an oxidant. It is used for many commercial products, including high performance applications and decorative coatings. It is used for refractory purposes and is one of the most important protective oxides. It has been used in industrial and chemical applications for centuries.
In the past, aluminium oxide flakes have been used for various purposes. These include the production of alumina-based pigments and the use in decorative coatings. In addition, it is used in industrial products and as a fire retardant.
The structure of alumina is important in the development of high energy density batteries. It consists of layers of loosely packed oxygen and tightly bound aluminum. Sodium b-alumina is another form of alumina. It can be prepared from a mixture of sodium cations and Al2O3.
In terms of the shape, flakes have an upper side and a lower side. The thickness of the flakes is usually 0.1 - 100 mm. However, the size of the flakes can vary.
Substrates for the electrically conductive pigments can be made from flake-form support materials. These can be natural or synthetic mica flakes, kaolin, sericite and silicon dioxide flakes.
In order to produce an electrically conductive layer, the substrates need to be doped with tin and antimony. These can be added to the aqueous suspension of the substrate. The tin and antimony can be metered in two separate solutions to achieve a homogeneous distribution. The thickness of the metal-oxide layer is preferably 5-200 nm.
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