Metal Foam For Sound Absorption

The metal foam is a good sound absorption material, with a more significant sound absorption coefficient at high frequencies. With this, the design of sound absorption frames can increase the sound absorption property at low frequencies. It is also used in nickel-cadmium battery and hydrogen-nickel battery electrode materials. The base material is open-celled foams and porous, and three methods can be used to produce a conductive layer: chemical plating, vacuum plating and leaching of conductive adhesive. The nickel pre-plating can be in sulfate nickel plating solution in nickel plating thickness generally. After calcination, reduction and annealing process can be obtained nickel foam electrode practical applications with excellent performance.