artificial corundum

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artificial corundum

mining

Also known as: beta-alumina, fused alumina, fused bauxite

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corundum
Artificial corundum may be produced as a specialty product, as for gem use, by slow accretion and controlled growth on a boule in an oxyhydrogen flame. This procedure is known as the Verneuil process (q.v.).
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Artificial corundum may be produced as a specialty product, as for gem use, by slow accretion and controlled growth on a boule in an oxyhydrogen flame. This procedure is known as the Verneuil process (q.v.).
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aluminum processing
Aluminum oxide
Fused aluminas are used in special refractories for the glass industry. Fused alumina is calcined alumina that is melted in electric-arc furnaces, cooled, crushed, and recast into desired shapes. In another application, industrial processes requiring hot gases use a unique heat-transfer device called a pebble…
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Fused aluminas are used in special refractories for the glass industry. Fused alumina is calcined alumina that is melted in electric-arc furnaces, cooled, crushed, and recast into desired shapes. In another application, industrial processes requiring hot gases use a unique heat-transfer device called a pebble…
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conductive ceramics
Batteries
High-energy-density batteries based on sodium beta-alumina have been developed for vehicular applications. Beta-alumina has the ideal formula Na₂O · 11Al₂O₃. It has a complicated structure consisting of spinel blocks sandwiching conduction planes in which sodium cations (Na⁺) can rapidly migrate. It is therefore known as a fast sodium ion conductor.…
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High-energy-density batteries based on sodium beta-alumina have been developed for vehicular applications. Beta-alumina has the ideal formula Na₂O · 11Al₂O₃. It has a complicated structure consisting of spinel blocks sandwiching conduction planes in which sodium cations (Na⁺) can rapidly migrate. It is therefore known as a fast sodium ion conductor.…
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