Ceramic vapour deposition

Heat-resistant plastic films made of PU or PE can be produced by ceramic vapour deposition, among other methods. This process takes place in an electron beam evaporator. Heat-resistant films are needed, for example, as separators in batteries for high-temperature ranges, which separate the positively and negatively charged electrodes from each other. They prevent direct contact between the two poles and avoid short-circuiting the battery.

To prevent the polyethylene and polypropylene films currently used as separators from melting at high temperatures (above approx. 120° C), they are additionally vapour-plated with ceramic. This type of ceramic separator can withstand temperatures of 180 degrees Celsius and more. Furthermore, the self-discharge rate of the battery is reduced by ceramic separators, thus increasing the service life of the battery.

Requirements for use

Electron beam evaporator

• Needed to thermally evaporate solids such as ceramics.