Lead-and cadmium-free glass composition for glazing, enameling and decorating glass

US5633090A · kind A · utility

Assignee

• Schott Glaswerke · DE

Inventors

• Erich Rodek · Mainz, DE
• Werner Kiefer · Ingelheim am Rhein, DE
• Friedrich Siebers · Nierstein, DE

Key dates

• Filing date: Jun 27, 1994
• Grant date: May 27, 1997
• Expiry date: Jun 27, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C8/02
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

An article of manufacture comprising a glass substrate having a thermal expansion of less than 5.0.multidot.10.sup.-6 /K and, coated thereon, a lead- and cadmium-free glaze comprising, in percent by weight, the following components: ______________________________________ Li.sub.2 O 0-12 MgO 0-10 CaO 3-18 B.sub.2 O.sub.3 5-25 Al.sub.2 O.sub.3 3-18 Na.sub.2 O 3-18 K.sub.2 O 3-18 BaO 0-12 SiO.sub.2 25-55 TiO.sub.2 0-5 ZrO.sub.2 0-<3 ______________________________________ with up to 30% by weight of a pigment stable at the baking temperature.