What property does boron phosphide have?

Due to different preparation methods, boron phosphide Has red, dark-red, transparent or black crystals, soft brown amorphous materials, or soft, brown substances. Its chemical properties are stable and it doesn’t dissolve in concentrated hydrochloric or nitric acids, nor does it in hydrofluoric or sulfuric 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 ignites at a cool temperature in chloroform, and ignites at a slightly warmer temperature in bromine. It can decompose by most metals at red heat and burns brightly with oxygen.

How is boron phosphide used?

The boron film has better mechanical properties than germanium carbide. It also has a higher adhesion to diamond and is easier to deposit on large areas. In comparison with diamond thin layer, boron-phosphide thin film has better adhesion, which is conducive to deposition of large areas. In order to reduce the internal stress, boron is a good material for anti-reflection films for high-speed infrared window.

Researchers are increasingly appreciating 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. The submarine telescope’s window is immersed into the seawater environment once it goes to sea. 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 seawater. The boron film is corrosion resistant and has good chemical resistance. It can protect the window from seawater erosion, ensuring the original optical performance.

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