Method of manufacturing aqueous ceramic suspensions and the use of said suspensions

US5362472A · kind A · utility

Assignee

• U.S. Philips Corporation · US

Inventors

• Josef Lauter · Geilenkirchen, DE
• Walter Mayr · Alsdorf, DE
• Joachim Opitz · Aachen, DE
• Gerd Romanowski · Aachen, DE

Key dates

• Filing date: Sep 4, 1992
• Grant date: Nov 8, 1994
• Expiry date: Sep 4, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B35/63424
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method describing the manufacture and use of aqueous suspensions comprising fine-powdered ceramic solid particles, dispersing agents and, if necessary, binders, in which method the manufacture of the suspensions includes the following process steps which are carried out separately or in combination: PA1 washing the solid particles in water before preparing the suspension; PA1 adding anionic compounds, in the form of sulphates, carbonates, iodates, chromates, oxalates, citrates and/or tartrates; PA1 manufacturing the suspensions and/or storing the finished suspensions in a CO.sub.2 -free gaseous atmosphere; PA1 manufacturing the suspensions and storing the finished suspensions at a temperature below 20.degree. C., preferably below 15.degree. C.; PA1 adding additional dispersing agents to the suspension at a time when reagglomeration of the solid particles in the suspension has not yet started or just started.