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Image #   29212B
Name:   Aluminum (metal) microspheres
Copyright:   Copyright 2010 Dennis Kunkel Microscopy, Inc.
Description:   Caption: Aluminum (metal) microspheres. These tiny spheres are made from aluminum oxide. Aluminum is the most abundant metal in the on Earth. It makes up about 8% by weight of the Earth's solid surface. Aluminum is too reactive chemically to occur in nature as a free metal. Instead it is found combined in over 270 different minerals. The main source of aluminum is bauxite ore. Approximately 95% of the world's bauxite production is processed first into alumina (aluminum oxide, Al2O3), and then into aluminum by electrolysis. Aluminum resists corrosion due to passivation and the metal's low density. Structural components made from aluminum and its alloys include the aerospace industry, transportation and building. Its reactive nature makes it useful as a catalyst or additive in chemical mixtures, including toothpaste and ammonium nitrate explosives. It is widely used as a coarse or fine abrasive in polishing compounds. Aluminum is also widely used in the fabrication of superconducting devices, particularly single electron transistors and superconducting quantum devices. In medicine aluminum microspheres are used for coupling of DNA, oligonucleotides, oligopeptides, proteins, lectins and antibodies.
Magnification*: x2,400
Type: SEM
    *(Magnifications are based on a 35mm slide image of 24mm in the narrow dimension.)
Keywords:   29212B miscellaneous airborne particulate airborne particulates particulate particulates aluminum aluminum sphere metal manmade SEM aluminum microsphere aluminum microspheres man made 03.01.10 AlO2 aluminum oxide aluminum oxide sphere aluminum oxide spheres aluminum oxides alumina Al2O3 aluminum nanosphere aluminum nanospheres aluminum oxide nanosphere aluminum oxide nanospheres nanosphere nanospheres corundum amphoteric oxide goethite hematite bauxite bauxites bauxite ore abrasive abrasives aerospace industry aluminum ceramics ammonium nitrate explosive ammonium nitrate explosives building industry ceramic ceramic industry ceramics polishing compound polishing compounds tooth paste toothpaste transportation industry electron transistor electron transistors superconducting devices superconducting quantum device superconducting quantum devices aloxite alundum tiny aluminum microsphere tiny aluminum microspheres tiny aluminum sphere tiny aluminum spheres

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