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    Glass solder

    Glass solders have a low melting point and are used for joining ceramic glass and metals. Some glass solders are non-crystalline while others crystallize after joining. The term soldering glass is also in use. Common chemical compositions of glass solders are B 2 O 3 -ZnO-SiO 2 and B 2 O 3 -PbO-SiO 2. See also Soldering glass.