Method for coloring ceramic surfaces

US6114054A · kind A · utility

Assignee

• BK Giulini Chemie Gmbh · DE

Inventors

• Thomas Klein · Saratoga, US
• Thomas Staffel · Grünstadt, DE
• Jürgen Straub · Mannheim, DE
• Lysander Fischer · Wiesloch, DE

Key dates

• Filing date: Dec 15, 1998
• Grant date: Sep 5, 2000
• Expiry date: Dec 15, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2111/82
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method for coloring a surface of a ceramic mass to produce a colored ceramic body includes providing a host lattice material composed of a colorless metal oxide compound which crystallizes into one of a spinel lattice or a rutile lattice and which may be water soluble; providing an aqueous coloring solution containing water; a first water soluble compound including a metal ion which is one of a two-valent metal ion or a three-valent metal ion and which colors the host lattice material; and a second water soluble compound including a metal ion which is one of a five-valent metal ion or six-valent metal ion and which provides electrostatic balance; generating a mixed-phase pigment in the surface of the ceramic mass by one of (i.) working a fine powder of the colorless metal oxide into the ceramic mass and applying the aqueous coloring solution onto at least one surface of the ceramic mass, or (i.i.) adding a water soluble colorless metal oxide compound to the aqueous coloring solution in an amount effective to form a mixture having a preselected viscosity and applying this mixture to the surface of the ceramic mass; drying the solution; and firing the ceramic body at a temperature …