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公开(公告)号：CA2141378A1
公开(公告)日：1995-09-08
申请号：CA2141378
申请日：1995-01-30
Applicant: CORNING INC
Inventor： ROSE PAUL L , NIGRIN JAROSLAVA M
Abstract: This invention is directed to a glass frit composition essentially free from lead and cadmium exhibiting a linear coefficient of thermal expansion (25.degree.C-300.degree.C) between about 75-85 X 10-7/.degree.C, good flow at temperatures between about 950.degree.1000.degree.C, a softening point between about 650.degree.-725.degree.C, and excellent resistance to attack by alkaline detergent and hydrochloric acid, said frit consisting essentially, expressed in terms of weight percent on the oxide basis (except for the fluorine content), of SiO2 49-55 MgO 0-2 B2O3 13-20 CaO 1-7 Al2O3 4.5-7 SrO 0-8 Na2O 5-8.5 BaO 0-11 K2O 5-8.5 ZnO 0-2 Na2O+K2O 11-16 F 0.25-3 .
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公开(公告)号：CA2066496C
公开(公告)日：2003-10-28
申请号：CA2066496
申请日：1992-04-21
Applicant: CORNING INC
Inventor： NIGRIN JAROSLAVA M , WEXELL KATHLEEN A , WEXELL DALE R
Abstract: This invention relates to a method for eliminating the grayish discoloration which commonly develops when lead- free and cadmium-free glass frits axe applied to substrates utilizing an organic medium and thereafter fired to fuse the frit particles into a glaze. The grayish discoloration contains a carbonaceous residue from the organic medium. The method comprises the four general steps: (1) adsorbing a coating of a strongly oxidizing metal ion species onto the surface of the frit particles; (2) mixing the coated frit particles with an organic medium; (3) applying that mixture to a substrate; and (4) firing the mixture to eliminate the organic medium and to oxidize the carbonaceous residue while fusing the frit particles into a glaze.
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公开(公告)号：CA2068440A1
公开(公告)日：1993-01-02
申请号：CA2068440
申请日：1992-05-12
Applicant: CORNING INC
Inventor： NIGRIN JAROSLAVA M , ROSE PAUL L , STEMPIN JOHN L , WEXELL DALE R
Abstract: This invention relates to glass frit compositions free from lead and cadmium which, when combined with an organic medium and fired to a glaze, yield a glaze exhibiting a grayish discoloration caused by the presence of a carbonaceous residue therein. The grayish discoloration can be eliminated by incorporating tin oxide in the frit composition which acts to catalyze the oxidation of and/or to directly oxidize that carbonaceous residue.
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公开(公告)号：CA2066496A1
公开(公告)日：1993-01-02
申请号：CA2066496
申请日：1992-04-21
Applicant: CORNING INC
Inventor： NIGRIN JAROSLAVA M , WEXELL KATHLEEN A , WEXELL DALE R
Abstract: This invention relates to a method for eliminating the grayish discoloration which commonly develops when leadfree and cadmium-free glass frits are applied to substrates utilizing an organic medium and thereafter fired to fuse the frit particles into a glaze. The grayish discoloration contains a carbonaceous residue from the organic medium. The method comprises the four general steps: (1) adsorbing a coating of a strongly oxidizing metal ion species onto the surface of the frit particles; (2) mixing the coated frit particles with an organic medium; (3) applying that mixture to a substrate; and (4) firing the mixture to eliminate the organic medium and to oxidize the carbonaceous residue while fusing the frit particles into a glaze.
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