2012

Mirror Switches Between Reflective and Transparent States

A flexible mirror film electrically switches between reflective and transparent states. By applying (+) voltages, hydrogenation occurs and creates transparency. When (-) voltages are used, the switchable mirror returns to its original reflective state within 10 seconds. The technology allows switchlevel control of the passage of solar radiation, thereby reducing cooling load.

The all-solid-state mirror has an ion-storage layer, a solid electorate layer, a buffer layer, a catalyst layer, and a switchable mirror layer made of a metallic alloy such as Mg-Ni, Mg-Ti, or Mg-Ca. The 100-micrometer-thick film can be built on flexible substrates and used in privacy glass or security equipment; in its reflective state, the film prevents the inside of a building or vehicle from being seen from the outside.

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