3.2.3. Aluminum oxide.-Aluminum oxide is a hard, high-resistance film that forms immediately on the surface of aluminum exposed to air. This tough film gives aluminum its good corrosion resistance. After a few hours, the oxide film formed is too thick to permit a low-resistance contact with cleaning. The film is so transparent that the bright
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*Aluminum has a reflectance dip at 0.8 µm: for λ = 0.8 µm, n = 2.80 and k = 8.45 for λ = 0.9 µm, n = 2.06 and k = 8.30 SOURCE: Handbook of Optical Constants of Solids Across the visible spectrum, silver is the most reflective (Figure 1).
D. Solar panel The solar panel absorbs solar energy, which can be transformed into electrical energy, which is the first procedure. Now the monocrystalline silicon solar panel is widely applied, and the photoelectric conversion rate is about 14% to ensure the energy supply of the solar road stud.
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U-factor is the rate at which a window, door, or skylight transmits non-solar heat flow. For windows, skylights, and glass doors, a U-factor may refer to just the glass or glazing alone. NFRC U-factor ratings, however, represent the entire window performance, including frame and spacer material.
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