Alpha Alumina Powder with More than 94% Purity
Application:
* Production of industrial ceramics, engineering ceramics, refractories, glaze catalysts
* In oil, gas and petrochemical industries
Product Introduction:
Aluminum oxide does not exist in nature in pure form, and it is necessary to obtain this material through chemical and physical processes. The most common approach is processing using the bauxite mineral, which has 45 to 85% aluminum oxide. The rest of the impurities include silica and other materials such as iron oxide and titanium oxide. A chemical process is used to purify bauxite. In this process, bauxite is dissolved in soda solution under high pressure in an autoclave, and then gibbsite or aluminum hydroxide is obtained in the precipitation stage. In the following, this material, along with impurities, is separated from the solution and dried during the process of washing and sedimentation. The important point is that some of the impurities remaining in the extracted hydroxide penetrate the gibbsite structure in an intergranular way and cause impurities in the aluminum hydroxide product; In addition to the presence of impurities in this substance, it is necessary to stabilize it and achieve a stable structure. In this regard, aluminum hydroxide should be calcinated at a temperature higher than 1500 degrees Celsius and control the temperature and time needed to produce aluminum oxide with a more stable phase. In this case, the stable phase is the crystalline phase of alpha aluminum, which parameters such as crystal size, powder density, and sodium impurity significantly affect this material’s final quality.
Technical Specifications:
* More than %94 purity aluminium
* The product is all corundum
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Type | This product is a final B2B consumer product. |