CRUSIBLE PEDESTAL FOR GROWTH OF SAPPHIRE MONOCRYSTALS (a-Al2O3) BY DIRECTIONAL VERTICAL CRYSTALIZZATION OF SMELT

摘要

A crucible pedestal for growth of sapphire monocrystalsby directional vertical crystallization of smelt made as hollow cylinder. At least three openings hollows of which are filled with tungsten or its alloy with molybdenum are made in walls of hollow cylinder and symmetrical located along its vertical axis.