Metallizing compositions and the preparation of electrically conductive articles
AssigneeHercules Incorporated
InventorRaymond Stanley Kosiorek
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Abstract
Metallizing compositions suitable for the production of fired on electrically conductive films which do not adversely affect the overall strength of heat resistant substrates are described. The compositions comprise, in specified proportions, at least one finely divided electrically conductive metal, certain alkali metal, crystallizable, high silica glass frits as binder, inert liquid vehicle and, if desired, inert filler and/or pigment. The compositions are particularly suited to glass substrates and provide therewith composite structures having greater strength than that of the glass substrate.
Claims7
An article comprising a heat resistant substrate having fused to at least a portion of its surface an electrically conductive metal film which does not adversely affect the overall strength of the substrate and is derived from a composition comprising by weight
- (a) from 50 to 88% of at least one finely-divided electrically conductive metal;
- (b) from 2 to 40% of a crystallizable glass frit binder consisting essentially of by weight 40 to 70% of SiO.sub.2, 10 to 31% of Al.sub.2 O.sub.3, 3 to 20% of Li.sub.2 O, 2 to 15% of B.sub.2 O.sub.3, 0 to 4% of As.sub.2 O.sub.3, 0 to 5% of Na.sub.2 O, 0 to 5% of K.sub.2 O, 0 to 6% of Bi.sub.2 O.sub.3, and at least one oxide component selected from the group consisting of 4 to 19% of ZrO.sub.2 and 1 to 10% of TiO.sub.2 ;
- (c) from 5 to 48% of an inert liquid vehicle;
- and
- (d) from 0 to 20% of an inert filler or pigment.
A method for forming on a heat resistant substrate an electrically conductive metal film which does not adversely affect the overall strength of the substrate, which method comprises applying to at least a portion of the surface of said substrate a layer of a conductive metal composition comprising by weight
- (a) from 50 to 88% of at least one finely-divided electrically conductive metal;
- (b) from 2 to 40% of a crystallizable glass frit binder consisting essentially of by weight 40 to 70% of SiO.sub.2, 10 to 31% of Al.sub.2 O.sub.3, 3 to 20% of Li.sub.2 O, 2 to 15% of B.sub.2 O.sub.3, 0 to 4% of As.sub.2 O.sub.3, 0 to 5% of Na.sub.2 O, 0 to 5% of K.sub.2 O, 0 to 6% of Bi.sub.2 O.sub.3, and at least one oxide component selected from the group consisting of 4 to 19% of ZrO.sub.2 and 1 to 10% of TiO.sub.2 ;
- (c) from 5 to 48% of an inert liquid vehicle;
- and
- (d) from 0 to 20% of an inert filler or pigment;
- and firing said layer on the substrate to form an adherent film of the electrically conductive metal thereon.
Dependencies are inferred from the claim text.