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Silicon block, method for producing the silicon block, transparent or opaque fused silica crucible suitable for carrying out the method, and method for producing the crucible

机译:硅块,硅块的制造方法,适用于该方法的透明或不透明的熔融石英坩埚以及该坩埚的制造方法

摘要

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.
机译:生产太阳能坩埚的方法包括提供具有内壁的透明或不透明熔融石英的坩埚基体,提供包含无定形SiO 2颗粒的分散体,通过使用将SiO 2的滑爽层涂覆在内壁的至少一部分上。分散液中,干燥滑动层以形成含SiO 2的晶粒层,并热致密化含SiO 2的晶粒层以形成扩散阻挡层。该分散体包含分散液和无定形SiO 2颗粒,它们与SiO 2纳米颗粒形成粗级分和精细级分。基于分散体的固体含量,SiO 2纳米颗粒的重量百分比在2至15重量%之间的范围内。通过在晶体生长过程中硅的加热,将含SiO 2的晶粒层热致密化为扩散阻挡层。

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