Smart windows for controlling light and heat with the help of ceramic particles

- Jun 18, 2020-

With the help of ceramic particles, windows can become very smart. This technology, called suspended particle devices, is a patented technology developed and licensed by leading research companies. It allows users to adjust glare and heat by controlling glass or plastic products such as windows, skylights, doors, sun visors, and glasses.

A suspended particle device (commonly referred to as an SPD or light valve) is a film in which droplets of liquid suspension are distributed. The light-absorbing particles are dispersed in the liquid suspension. These randomly oriented microscopic particles are usually made of black ceramic pigments (iron complex oxide, copper chromium oxide, or bismuth manganese oxide). Material + WeChat, the content is good. These particles can reflect heat, especially near infrared radiation.

This film is encapsulated between two glass or plastic plates coated with a transparent conductive material. When there is no voltage; the particles absorb light and prevent it from passing through the film. When a voltage is applied, the particles rearrange so that light can pass through. By using simple switches or other control devices to adjust the voltage, users can immediately adjust the light, glare and heat emitted through products such as windows. This gives the user a certain range of transparency, where the light transmittance can change rapidly according to the applied voltage.

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