Patent ID: 9114990
Filing Date: 2015-08-25
Classification: C01B,C30B

Abstract:
1. A device for the production of silicon blocks, the device comprising: a vessel for receiving a silicon melt, the vessel comprising a vessel wall comprising at least one side wall, a bottom, an inside and an outside, said vessel further comprising a central longitudinal axis; and means for creating a temperature field on the inside of the bottom which temperature field has a temperature gradient which temperature gradient, when the silicon melt cools down, is perpendicular to the central longitudinal axis at least in some regions of the bottom of the vessel, said means for creating the temperature field on the inside of the bottom comprising an insulation unit for insulating the vessel by means of at least a first bottom insulation element and a second bottom insulation element, said first bottom insulation element comprising at least one region having a heat conductivity that differs from a heat conductivity in a region of said second bottom insulation element.