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| Technical performance | |
|---|---|
| Base material | Al |
| Film thickness | 500 nm |
| Solar spectral absorption ratio (AM1.5) | α=96%±2% |
| Infrared Emissivity (80 ℃) | ε=6% ±2% |
| Coating Adhesion（GB1720-79） | Level 1 |
| Heat resistance（GB/T1735-2009） | -40℃-160℃ Absorption ratio remained at 90% of original value |
| Resistance to neutral salt spray（GB/1771-2007） | Measured 200 hours without cracks, blistering, peeling and rust |
| Artificial climate aging（GB/T1865-2009） | Measured 1000 hours absorption ratio remained above 95% of the original value |
| Artificial radiation exposure to filtered hernial arc radiation（GB/T1865-2009） | Appearance good, no blistering, no loss of light, no color change and absorption measured 1000 hours and remain at 95% of the original value |
| UV aging（3000H） | Measured 3000 hours without yellowing, no delamination, no blistering. Endothermic and emission in the original value of more than 90% |
| Specifications | Length: 2450/2370/2360/2350/2345/1970/1960/1950/1945/1940 Width: 745/770/760/750/745/970/960/950/945/940 Thickness: 0.4 / 0.3 |
Process principle
Highly Selective Absorbent of Nano - Chromium Black Is used "Direct oxidation and deposition of high-temperature sintering crystallization method" referred to as "direct oxidation sintering", the English abbreviation "Ddos" (direct deposition oxidation sinter)The process principle is: continuous nano-transition metal preformed dopant, placed on top of the molten metal, due to capillary action, the molten metal to the preform infiltration. The molten metal impregnated in the nano-transition metal preform is reacted with the vapor-phase oxidant to form an oxide matrix, and the resulting oxide is deposited around the nanostructured transition metal to form a transition metal compound in the presence of a small amount of the additive in the molten metal and in an air or an oxidizing atmosphere A compact, continuous nanostructured, metal-reinforced ceramic matrix metal matrix composite with a small amount of residual metal. In the process by adding nano-chromium oxide powder, as an absorbent and mirror agent to ensure high absorption rate and low emissivity, absorption rate = 95 emissivity = 8%. In this process, through the external continuous heating to ensure the permeability of the molten metal and the substrate, so that the entire multi-oxide surface lattice variation to ensure that the material as a whole, to achieve the overall life of the same requirements. Therefore, our products are light energy film and the substrate as a whole material, from the fundamental solution to the film discoloration, loss, attenuation, intolerance, salt spray performance is poor, and other defects. Nano-Cr2O3 particles are evenly distributed in the product, to ensure that the heat absorber with excellent performance.In summary: nano black chrome absorber is a solar heat absorber products in a revolutionary innovative products.
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