Patent
Crucible for the crystallization of silicon and process for making the same
TLDR
In this article, it has been shown that a base body comprising a bottom surface and side walls defining an inner volume, and a protective coating comprising 80 to 95 % of silicon nitride and 5 to 20 wt. of a low temperature mineral binder, the total oxygen content ranging from 5 to 15 % by weight.Abstract:
The invention relates to a crucible for the crystallization of silicon and to the preparation and application of release coatings for crucibles used in the handling of molten materials that are solidified in the crucible and then removed as ingots, and more particularly to release coatings for crucibles used in the solidification of polycrystalline silicon. The objective of the inventor was to provide a crucible comprising a silicon nitride coating which is faster and cheaper to produce and which is stronger with an improved adherence to the walls. It has now been found that these problems can be solved with a crucible for the crystallization of silicon comprising a) a base body comprising a bottom surface and side walls defining an inner volume; b) a protective coating comprises 80 to 95 wt. % of silicon nitride and 5 to 20 wt. of a low temperature mineral binder, the total oxygen content ranging from 5 to 15 % by weight.read more
Citations
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Journal ArticleDOI
Influence of oxidation on the wetting behavior of liquid silicon on Si3N4-coated substrates
TL;DR: In this article, a silicon nitride coating on a silica substrate has been fired in atmospheres of air, argon and nitrogen, at temperatures of 900 and 1100°C, with holding times of 30min, two and four hours.
Journal ArticleDOI
The crucible/silicon interface in directional solidification of photovoltaic silicon
TL;DR: In this article, the interfacial interactions and microstructure are studied in crystallization experiments performed in crucibles involving high silicon masses and long contact time between the silicon and the coated silica (tens of hours).
Patent
Firmly adhering silicon nitride-containing release layer
TL;DR: In this paper, a slip for producing a durable, firmly adhering release layer on a substrate, comprising a suspension of solid particles, was proposed, wherein the solid particles comprised 67-95% by weight of silicon nitride and 5-33% of an SiO 2-based high-temperature binder.
Journal ArticleDOI
Chemical stability of silicon nitride coatings used in the crystallization of photovoltaic silicon ingots. Part I: Stability in vacuum
TL;DR: In this paper, a series of experiments was performed to study the reactions between coating components under high vacuum, varying the temperature, the holding time and the oxygen content in the coating, taking into account the diffusive transport of reaction species from the inside of the porous coating to its surface and then their evaporation into the vapour phase.
Patent
Calcium hexaluminate-containing mold and facecoat compositions and methods for casting titanium and titanium aluminide alloys
Bernard Patrick Bewlay,Brian Michael Ellis,Stephen Francis Bancheri,Michael James Weimer,Joan Mckiever +4 more
TL;DR: The disclosure relates to mold compositions, intrinsic facecoat compositions, and methods for casting titanium-containing articles, where the mold comprises calcium hexaluminate, and the articles so molded as discussed by the authors.
References
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Patent
Protective layer for quartz crucibles used for silicon crystallization
TL;DR: A thermodynamically stable, protective coating layer is applied by thermal spray technique to the inner and outer surfaces of a quartz crucible used for mono or polycrystalline silicon crystallization processing.
Patent
Crucible for the crystallization of silicon.
TL;DR: In this paper, it has been shown that these problems can be solved with a crucible for the crystallization of silicon comprising a) a base body comprising a bottom surface and side walls defining an inner volume; b) an intermediate layer comprising 50 to 100 wt% of silica at the surface of the side walls facing the inner volume, and c) a surface layer comprising50 to 100wt% silicon nitride, up to 50wt% of silicon dioxide and up to 20wt%of silicon on the top of the intermediate layer.
Patent
Coating resin composition
Toshio Fujibayashi,Haruo Nagaoka +1 more
TL;DR: A coating resin composition composed mainly of an epoxy resin derivative obtained by reacting an amine compound containing hydroxyl groups, secondary amino groups, and amide groups in a molecule with epoxy resins in its epoxy groups is used in a cationically electrodepositable paint.
Patent
Melting pot with silicon protective layers, method for applying said layer and the use thereof
TL;DR: In this article, a melting pot with silicon protective layers is described, and a method for applying such a layer and the use of it is described; the method is described in detail.
Patent
Vessel for holding silicon and method of producing the same
TL;DR: In this article, a vessel for holding a silicon molten bath which can effectively prevent contamination of a silicon melt solution and have excellent sinterability, mechanical strength and productivity is described, and the interior of the vessel is formed with a sprayed coating by spraying a silicon composite thermet consisting of metal silicon (MSi), silicon nitride (Si3N4), and silicon oxide (SiO2).