Tungsten Heater for Vacuum Aluminizing - Mirror Industry

Mirror is one of the daily commodities. Development of the mirror has experienced three stages: copper, mercury and silver, and with the development of science and technology, vacuum aluminizing has been widely used in mirror industry. Although the history of silver mirror is long and the manufacturing process is more maturity. However, its manufacturing process requires a lot of silver, so it has a great damage for environmental. In addition, the stability of the quality of the product is not enough. Especially in summer, mirror is easy to be damp and silver layer is easy to metamorphose. Therefore, when aluminum mirror was launched, it is popular with the majority of manufacturers. This mirror is made by a new manufacturing process of vacuum aluminizing which evaporate an aluminum film to glass by tungsten heater in vacuum. Two kinds of mirror looks the same, but the mirror of aluminum mirror is blue, the light is soft, silver mirror is white.

Mirror made by vacuum aluminizing has the following excellent features: on the one hand, it is using a vacuum physical vapor deposition, chemical adsorption-based, aluminum film can be well combined with glass, which has a good adhesion. Therefore, the wear resistance of aluminum mirror is strong with long life time. On the other hand, gas molecules of aluminum deposited in vacuum is meticulous, so that the film coated on the glass surface is more uniform with less trachoma, which can improve the corrosion resistance of aluminum mirror, it can be placed in the kitchen and bathroom.

Another point is that vapor deposition of aluminum is from ultraviolet to infrared, because the infrared have relatively high and flat spectral reflectance, reflectance of aluminum mirror in the visible light field can reach more than 90%, which has a higher reflectivity rate and it can reflect image clearly.

However, alkaline resistance of aluminum mirror is poor, which cannot be wiped with a cloth with alkali.

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