01 Calcination treatment
The calcination of brown aluminum oxide produces some liquid substances that can fill the small cracks produced during the lattice crushing process. Calcination can also burn off the dust and grease on the brown fused alumina. The operation process is to calcine the brown corundum in a rotary kiln or a vertical furnace, which can enhance its toughness and hardness.
02 Alkali corrosion treatment
Brown aluminum oxide is placed in a sodium hydroxide solution, then heated, cooled, washed and dried. This method allows sodium hydroxide and aluminum oxide to react, which can improve the bonding strength of brown fused alumina.
03 Ceramic liquid silane composite treatment
The brown aluminum oxide is made by adding the prepared ceramic slurry to it, drying it and then firing it. It gives the surface of the brown fused alumina an extra layer of porous ceramic, making it heat-resistant and acid-resistant.
04 Brown aluminum oxide treated with silane
Silane is generally selected as a flowing liquid with a medium molecular weight. Silicone oil and silicone grease with a large molecular weight are not suitable as a tackifier. The advantage is that silane can form a transition layer between brown fused alumina and resin binder to increase the bonding strength between the two.
05 Brown aluminum oxide coated with resin liquid
Apply a layer of prepared resin liquid on the surface of brown fused alumina and then solidify it. Having an extra layer of resin on the surface can improve the bonding effect between brown corundum and the binder and the heat and acid and alkali resistance of the abrasive, thereby extending the service life of brown corundum.
06 Brown aluminum oxide coated with metal salt
We first prepare the metal salt into a solution, then apply it to the surface of brown fused alumina, and then calcine it at high temperature. There are many types of metal salts that can be selected for this method, such as iron nitrate, copper sulfate, and nickel oxide.
