Lead-and cadmium-free glass composition for glazing, enameling and decorating glass
AssigneeSchott Glaswerke
InventorsErich Rodek, Werner Kiefer, Friedrich Siebers
Life of this patent
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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.
Claims25
An article of manufacture comprising a glass ceramic or 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 consisting essentially of, 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.
A glass composition, suitable for glazing, enameling and decorating glass ceramics or glasses consisting essentially of, in percent by weight, the following components:
- ______________________________________ Li.sub.2 O 8-12 MgO 0-3 CaO 5-10 B.sub.2 O.sub.3 5-13 Al.sub.2 O.sub.3 5-10 Na.sub.2 O 5-10 K.sub.2 O 5-10 BaO 8-12 SiO.sub.2 45-55 TiO.sub.2 0-5 ZrO.sub.2 0-<3 ______________________________________
- with up to 30% by weight of a pigment stable at the baking temperature.
A glass composition, suitable for glazing, enameling and decorating glass ceramics or glasses consisting essentially of, in percent by weight, the following components:
- ______________________________________ Li.sub.2 O 8-12 MgO 6-10 CaO 5-10 B.sub.2 O.sub.3 15-20 Al.sub.2 O.sub.3 5-10 Na.sub.2 O 5-10 K.sub.2 O 10-15 BaO 0-5 SiO.sub.2 30-40 TiO.sub.2 0-5 ZrO.sub.2 0-<3 ______________________________________
- with up to 30% by weight of a pigment stable at the baking temperature.
A glass composition, suitable for glazing, enameling and decorating glass ceramics or glasses consisting essentially of, in percent by weight, the following components:
- ______________________________________ Li.sub.2 O 8-12 MgO 0-3 CaO 10-15 B.sub.2 O.sub.3 5-13 Al.sub.2 O.sub.3 10-15 Na.sub.2 O 5-10 K.sub.2 O 5-10 BaO 0-5 SiO.sub.2 35-45 TiO.sub.2 0-5 ZrO.sub.2 0-<3 ______________________________________
- with up to 30% by weight of a pigment stable at the baking temperature.
A glass composition, suitable for glazing, enameling and decorating glass ceramics or glasses consisting essentially of, in percent by weight, the following components:
- ______________________________________ Li.sub.2 O 4-8 MgO 0-5 CaO 5-10 B.sub.2 O.sub.3 5-13 Al.sub.2 O.sub.3 5-10 Na.sub.2 O 5-10 K.sub.2 O 5-10 BaO 8-12 SiO.sub.2 40-50 TiO.sub.2 0-5 ZrO.sub.2 0-<3 ______________________________________
- with up to 30% by weight of a pigment stable at the baking temperature.
A glass composition, suitable for glazing, enameling and decorating glasses consisting essentially of, in percent by weight, the following components:
- ______________________________________ Li.sub.2 O 4-8 MgO 0-3 CaO 10-15 B.sub.2 O.sub.3 15-20 Al.sub.2 O.sub.3 5-10 Na.sub.2 O 5-10 K.sub.2 O 5-10 BaO 0-5 SiO.sub.2 40-50 TiO.sub.2 0-5 ZrO.sub.2 0-<3 ______________________________________
- with up to 30% by weight of a pigment stable at the baking temperature.
An article of manufacture comprising a glass ceramic or 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, said glaze having a thermal expansion coefficient of 9.20 to 16.40.multidot.10.sup.-6 /K.
An article of manufacture comprising a glass ceramic or 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, said glaze having a thermal expansion coefficient of 10.18 to 13.13.multidot.10.sup.-6 /K.
An article of manufacture comprising a glass ceramic or glass substrate having a thermal expansion of less than 5.0.multidot.10.sup.-6 /K, and coated thereon with a glaze essentially free of lead, cadmium, zinc, tin, fluorine and molybdenum compounds and 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.
An article of manufacture comprising a glass ceramic or glass substrate having a thermal expansion of less than 5.0.multidot.10.sup.-6 /K, and coated thereon with a glaze free of lead, cadmium, zinc, tin, fluorine and molybdenum compounds and 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.
Dependencies are inferred from the claim text.