Aluminum foam is a new type of functional material, it is a metal aluminum matrix dispersed in countless bubbles similar to foam-like ultra-lightweight metal materials, general porosity of 40% to 98%.
Aluminum foam has high heat resistance, even if it reaches the melting point of the alloy, it does not melt. The melting temperature of general aluminum alloy ranges from 560 to 700℃, but aluminum foam does not melt even if it is heated up to 1400℃. Moreover, it does not release harmful gases at high temperatures, so it can replace foamed resin and asbestos products as heat-insulating and heat-resistant materials in many occasions.
Aluminum foam can dissipate the kinetic energy of air into heat energy through the vibration of the pore wall, so it can be used as acoustic panels for noise reduction lining of highways and railroads, subway tunnels, subway stations, railroads, swimming pools, conference halls, large equipment rooms, and so on. Changing the thickness of the air layer set behind the acoustic panel can control the main frequency of the acoustic coefficient of the aluminum foam panel, so that the acoustic panel can be made for different noises. In addition, the aluminum foam panel does not absorb moisture, in a humid environment, the sound absorption rate does not decrease, is the best sound-absorbing material in a humid environment.
Aluminum foam has a wide range of applications in the construction industry. For example, with aluminum foam manufacturing elevator can greatly reduce its weight, thus reducing energy consumption, and foam aluminum excellent energy absorption performance and ensure the safety of the elevator. If aluminum foam is used as a decorative material, it is not only lightweight and beautiful, but also can play a fireproof and sound insulation effect.

In construction, another typical demand is to use aluminum foam material to manufacture curtain wall panels for tall buildings. This state-of-the-art curtain wall panel has energy absorption, sound insulation and heat insulation functions, which can cushion the impact of wind pressure on tall buildings, insulate and reduce noise, and improve comfort. The thermal conductivity of aluminum foam is not only related to the porosity, but also to the distribution of voids, the latter playing a leading role, such as the extension of bubble holes along the perpendicular to the direction of the heat flow will increase the ability to impede the flow of heat, and even due to the connectivity of the direction and the emergence of a “high thermal resistance wall”, and therefore is a very promising thermal insulation material.
Aluminum foam material as a new type of structure-function integration material, with low relative density, light weight, large specific surface area, high specific mechanical properties, good damping performance, damping, anechoic, thermal insulation, thermal conductivity, shock absorption, electromagnetic shielding protection, energy absorption and buffer and other excellent mechanical properties and physical properties.