Protective coating for metalhydride based devices

Details Protective coating for metalhydride based devices Protective coating for metalhydride based devices

G - Physics

02

F

G02F 1/19 (2006.01) G01N 21/78 (2006.01) G02F 1/15 (2006.01) H01M 4/38 (2006.01)

Patent

CA 2650689

A switchable mirror device comprising active layer (4) wherein said active layer changes its optical properties by adding/removal of hydrogen and comprises a Mg-transition metal layer, or an Y or rare earth based layer said active layer being provided on one side with a further protective layer (3) comprising a hydrogen and oxygen permeable and water impermeable layer, characterized in that said layer is liquid water impermeable and water vapor permeable and has hydrophobic surface properties. A pd catalyst layer (5) may be disposed between the active layer (4) and the protective layer (3).

La présente invention concerne un dispositif de miroir commutable comprenant une couche active (4), ladite couche active changeant de propriétés optiques par l'ajout/le retrait d'hydrogène, et comprenant une couche de métal de transition Mg, ou bien une couche à base de Y ou de terre rare, ladite couche active étant disposée sur un côté avec une couche de protection supplémentaire (3) comprenant une couche imperméable à l'eau et perméable à l'hydrogène et à l'oxygène, caractérisé en ce que ladite couche est imperméable à l'eau liquide et perméable à la vapeur d'eau et présente des propriétés d'hydrophobie de surface. Une couche de catalyse pd (5) peut être disposée entre la couche active (4) et la couche de protection (3).

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