BLACK ALUMINUM NITRIDE AND METHOD FOR MANUFACTURING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a black aluminum nitride (AlN) substrate by nitriding an entire surface of a metallic aluminum sheet, the AIN substrate being capable of efficiently absorbing solar beams of all wavelength regions and converting the same into heat, and of transporting the resulting heat to a thermoelectric device at a high speed.SOLUTION: The black aluminum nitride comprises nano-sized cubic crystals or nano-sized whiskers (fibrous crystals), which are formed on a metallic aluminum sheet surface by heating a metallic aluminum sheet (hereafter referred to also as an "Al sheet") in a nitrogen atmosphere for a specified period of time at a temperature equal to or higher than the melting point of the metallic aluminum sheet (660.2°C).