Abstract: A substrate of glazing material carries a multi-layer coating which comprises a reflective layer of silver sandwiched between a transparent undercoat and a transparent overcoat. The undercoat for the silver layer comprises at least one layer of a metal oxide. The overcoat for the silver layer comprises a layer of an oxide of a sacrificial metal selected from the group consisting of titanium, aluminum, stainless steel, bismuth, tin and mixtures of two or more thereof, which is formed by initial deposition of the sacrificial metal and its conversion to oxide over which is deposited a layer of zinc oxide having a thickness not greater than 15 nm, and an uppermost overcoating layer of metal oxide selected from the group consisting of tin oxide, bismuth oxide, aluminum oxide, titanium dioxide and mixtures of two or more thereof. For forming a low emissivity coating with good light transmission, the silver layer is 8 to 12 nm thick.

Abstract: A substrate of glazing material carries a multi-layer coating which comprises a reflective layer of silver sandwiched between a transparent undercoat and a transparent overcoat. The undercoat for the silver layer comprises at least one layer of a metal oxide selected from tin oxide, titanium dioxide, aluminium oxide, bismuth oxide and a mixture of two or more thereof, over which is deposited a layer of zinc oxide having a thickness not greater than 15 nm. The overcoat for the silver layer comprises a layer of an oxide of a sacrificial metal selected from the group consisting of titanium, aluminium, stainless steel, bismuth, tin and mixtures of two or more thereof, which is formed by initial deposition of the sacrificial metal and its conversion to oxide. For forming a low emissivity coating with good light transmission, the silver layer is 8 to 12 nm thick.

Abstract: An electrochromic device comprising a solid layered structure. The structure includes a pair of electrodes and an electrochromic layer sandwiched between the pair of electrodes. The device is sandwiched between a pair of vitreous sheets of which at least one is transparent with a reservoir of ionizable material being held between the sheets. On application of an electrical potential between the electrodes, ions are permitted to migrate between the ionizable material and the electrochromic layer.

Abstract: A glazing panel for transmitting radiant energy including visible light energy which includes first and second glass sheets supported in spaced relation. The first glass sheet has an oxide coated surface which defines an exterior surface of the panel and a gold coating on the surface which faces the second glass sheet.