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What property does boron phosphide have?
Due to different preparation methods,
Has red, black, or dark-red transparent crystals, as well as soft, brown amorphous materials. The chemical properties are stable and boron-phosphide does not dissolve in concentrated hydrochloric or sulfuric acids, nor hydrofluoric or hydrochloric acids mixed with other acids.
Boron phosphide shares many properties with refractory substances. It has similar properties to diamond and boron-nitride, and is harder than silicon carbide. It can have an anti-oxidation property even when heated to a temperature between 800 and 10,000 degrees Celsius in the atmosphere. When boron is heated, the phosphorus in it disappears and a light grey residue forms. Boron-phosphide is ignited in a cool place by chlorine and in a slightly warm state by bromine. It can decompose by most metals at red heat and burns brightly with oxygen.
How is boron phosphide used?
The boron film phosphide has superior mechanical properties compared to germanium carbide. It also has the best rain resistance of similar films. This can increase the damage threshold speed of the substrate. In comparison with germanium carbide boron has better mechanical characteristics; in comparison with diamond boron thin layer is better adherent and more conducive to deposition over large areas; and compared to DLC boron has lower internal stress. In order to reduce the internal stress, boron is a good material for anti-reflection films for infrared windows on high-speed aircraft.
Researchers are beginning to appreciate the protective properties of boronphosphide on other components exposed to harsh environments. Boron-phosphide film is a corrosion-resistant material that’s ideal for the infrared windows of submarine telescopes. Once the telescope window is out at sea, it will always be immersed in water. The window should not only have a high transmittance in order to maintain the sensitivity of the photoelectric sensor, but it must also resist corrosion caused by chemicals found in the seawater. The boron film is corrosion resistant and has excellent chemical stability. It can protect the window from seawater erosion, ensuring the original optical performance.
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