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

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United States of America Patent

PATENT NO 9828691
SERIAL NO

14817839

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Abstract

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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 SiO2 particles, applying a SiO2-containing slip layer to at least a part of the inner wall by using the dispersion, drying the slip layer to form a SiO2-containing grain layer and thermally densifying the SiO2-containing grain layer to form a diffusion barrier layer. The dispersion contains a dispersion liquid and amorphous SiO2 particles that form a coarse fraction and a fine fraction with SiO2 nanoparticles. The weight percentage of the SiO2 nanoparticles based on the solids content of the dispersion is in the range between 2 and 15% by weight. The SiO2-containing grain layer is thermally densified into the diffusion barrier layer through the heating up of the silicon in the crystal growing process.

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Patent Owner(s)

Patent OwnerAddress
HERAEUS QUARZGLAS GMBH & CO KGQUARZSTRASSE 8 HANAU 63450

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dadzis, Kaspars Freiberg, DE 3 3
Fischer, Gerd Dohna, DE 33 216
Freudenberg, Bernhard Coburg, DE 15 84
Lehmann, Walter Leipzig, DE 37 231
Nadolny, Sandra Freiberg, DE 1 3
Nielsen, Nils-Christian Schlangenbad, DE 2 8
Scheich, Gerrit Seligenstadt, DE 14 58
Schenk, Christian Ingelheim, DE 24 110
Wolny, Franziska Dresden, DE 2 3

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