Applications photochromic glasses

Silver chloride is used in silver plating and to obtain pure silver. The salt also finds applications in photography and optics in photochromic glass and in electrodes and batteries. It is used to make antiseptic silver solution. It occurs as the mineral cerargyrite. 

Smith GP (1967) Photochromic glasses poptaties and applications. J Mat Sci 2(2) 139-152 Stmat K, Hoffer G, Olson J, Osbatag W, Beckta- JJ (1967) A family of new cobalt-based permanent magnet materials. J Appl Phys 38(3) 1001-1002... 

Color Science Image Processing Metal Cluster Chemistry Optical Information Processing Photochromic Glasses Phosphors Polymers, Electronic Properties Polymers, Photorespon-siVE (IN Electronic Applications) Smart Pixels... 

To synthesize photochromic glass, silica and metal halide powders are placed into a platinum crucible and heated in air to 1,400°C, followed by pouring into slabs and annealing at ca. 400° C overnight. Another heat treatment at a temperature around 600-650°C (ca. 1 h) is then performed to control the size of the inclusimis, required for high transmittance and spectral response. We will see examples of organic molecules that also give rise to photochromism in Chapter 5 for plastic lenses, CD-R memory, and molecular switch applications. 

Applications. Major uses are chemical ware, pharmaceutical ware, cosmetic containers, housewares, optical and ophthalmic lenses, photochromic glass, lighting and electrical applications, telescope and other mirror substrates, solar energy systems, flat panel display... 

Obvious applications of photochromism include glasses which darken according to the intensity of the surrounding light, and such glasses have now been available for some time both in the form of plate glass for windows and in the form of lenses for sunglasses. Their action is very slow, it takes indeed many minutes for the photostationary state to be established. This is due to the fact that the photochromic effect takes place at the molecular level... 

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