Heraeus Quarzglas Gmbh & Co Kg

Solarworld Innovations Gmbh

Gerd Fischer

Bernhard Freudenberg

Walter Lehmann

Christian Schenk

Gerrit Scheich

Andreas Krause

Armin Müller

Josef Stenzenberger

Nils-Christian Nielsen

Mark Hollatz

Kaspars Dadzis

Franziska Wolny

Sandra Nadolny

A method for producing a solar crucible includes providing a crucible base body of transparent or opaque fused silica having an inner wall, providing a dispersion containing amorphous SiOparticles, applying a SiO-containing slip layer to at least a part of the inner wall by using the dispersion, drying the slip layer to form a SiO-containing grain layer and thermally densifying the SiO-containing grain layer to form a diffusion barrier layer. The dispersion contains a dispersion liquid and amorphous SiOparticles that form a coarse fraction and a fine fraction with SiOnanoparticles. The weight percentage of the SiOnanoparticles based on the solids content of the dispersion is in the range between 2 and 15% by weight. The SiO-containing grain layer is thermally densified into the diffusion barrier layer through the heating up of the silicon in the crystal growing process.

Silicon block, method for producing the same, crucible of transparent or opaque fused silica suited for performing the method, and method for the production thereof

Method for producing a silicon ingot, comprising the following steps: providing a container to receive a silicon melt, providing a temperature control device to control the temperature of the silicon melt in the container, arranging raw material in the container comprising silicon and at least one nucleation agent to assist a heterogeneous nucleation in the silicon melt, and control of the temperature in the container for the directed solidification of the silicon melt, the nucleation agent comprising nanoscale particles.

Method for producing a silicon ingot by solidification of a melt comprising a nucleation agent including nanoscale particles

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Dohna, Germany

Gerd Fischer