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Bookmark or Share- Alpha-Aluminium Oxide - an overview | ScienceDirect TopicsThe clinical application of alumina is based on its biocompatibility, density, strength, and wear resistance. Alumina (aluminum oxide, Al 2 O 3) may occur in many metastable phases. All these phases irreversibly transform into alpha–alumina if heated above 1200°C, a close-packed hexagonal arrangement of oxygen ions which is a very high ...
- Alumina Production - an overview | ScienceDirect TopicsAlumina is an important industrial application material [1]. It is commonly used as microelectronic components, corrosion resistant coatings, chemical catalysts and oxidation resistant protective coatings at high temperature [2]. At present, the main production method of alumina in the world is Bayer process [3–9].
- Control of the γ-alumina to α-alumina phase transformation for an ...According to these results, the γ-Al 2 O 3 transition alumina raw powder attrition milled contributes to lowering activation energy for the formation of the stable α alumina phase. On the other hand, the value of the exhibitor Avrami parameter [40] , [41] , which reflects the transformation rate by germination and growth, is defined by (Eq.
- Enhanced mechanical properties of alumina ceramics: Role of nanoscale C ...Alumina ceramics were prepared by introducing C@Al 2 O 3 into the DBDPM-treated Al 2 O 3 powder. During the heat treatment process, the colloidal carbon spheres in the Al 2 O 3 nanospheres were oxidized to form Al 2 O 3 hollow spheres in the alumina ceramics, which significantly increased the closed porosity of the alumina ceramics (increase by ...
- Activated Alumina - an overview | ScienceDirect TopicsActivated alumina. Activated alumina is a commercial porous oxide with specific surfaces of 200-300 m2 g −1 and can be used for phosphate, fluoride and arsenic adsorption, especially in a fixed-bed mode. It is rather specific for these anions, and can be regenerated with dilute NaOH and sulfuric acid.
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