Crucible for photovoltaics

US8840861B2 · kind B2 · utility

Assignee

• H.C. STARCK INC. · US

Inventors

• Rolf Wagner · Selb, DE
• Manuel Matussek · Marktredwitz, DE

Key dates

• Filing date: Jan 14, 2011
• Grant date: Sep 23, 2014
• Expiry date: May 14, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C30B28/04
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A method for producing a workpiece comprising a layer of an additive-free silicon nitride includes providing a base body of the workpiece. A layer of a slip comprising a silicon powder is applied to an inside of the base body so as to obtain a coated base body. The coated base body is subjected to a reactive firing under nitrogen so as to convert the silicon powder to the additive-free silicon nitride.