High-solids SiO2 dispersions, process for producing them, and their use

US6699808B1 · kind B1 · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Fritz Schwertfeger · Griesheim, DE
• Johann Weis · Sauerlach, DE
• Peter Ritter · Berlin, DE
• Achim Molter · Dietmannsried, DE
• Wolfgang Schweren · Kempten, DE
• Volker Frey · Burghausen, DE
• Hans-Peter Scherm · Emmerting, DE

Key dates

• Filing date: Mar 1, 2002
• Grant date: Mar 2, 2004
• Expiry date: Mar 17, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2235/96
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Extremely high solids content silica dispersions are useful for forming green bodies of near net shape as compared to the shape of the bodies after sintering. The green bodies are particularly useful for sintering to form low impurity-containing crucibles for single crystal silicon production.