Silicon and method for producing the same

US7758839B2 · kind B2 · utility

Assignee

• Joint Solar Silicon GmbH & Co. KG · DE

Inventors

• Peter Adler · Los Angeles, US
• Andreas Gölz · Maulburg, DE
• Holger Kirchner · Friedrichsdorf, DE
• Armin Muller · Freiberg, DE
• Torsten Sill · Freiberg, DE
• Raymund Sonnenschein · Frankfurt, DE

Key dates

• Filing date: May 10, 2005
• Grant date: Jul 20, 2010
• Expiry date: Mar 15, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B33/029
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Method for producing silicon which is suitable as a starting material for producing a silicon melt for the fabrication of silicon blocks or silicon crystals, comprising the following steps: introducing a gaseous mixture of monosilane and hydrogen into a reactor, thermal degrading the gaseous mixture for forming silicon powder, separating the formed silicon powder produced from the gaseous mixture, and mechanical compacting the separated silicon powder with compacting rollers which having a roller jacket consisting of a ceramic material selected from graphite, glass and silicon nitride.