MOLYBDENUM CRUCIBLES FOR SAPPHIRE CRYSTAL GROWTH (LED) IN HIGH TEMPERATURE FURNACES

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Issue Time: Nov 6,2018

_{The furnace industry has seen a remarkable growth in the production of custom-made, high temperature vacuum or argon atmosphere}_{furnaces for growing sapphire crystals used in manufacturing of LEDs. These furnaces have unique and demanding hot zone designs for}_{melting alumina in crucibles for precise, highly controlled crystal growth.}

_{Getwick is fully aware of the various sapphire crystal growing methods and supplies components to the customers accordingly.The hot}_{zones in sapphire growing furnaces use Getwick's molybdenum and tungsten products for furnace components and fixtures. These}_{high temperature materials are characterized by their high thermal and electrical conductivity, low coefficient of thermal expansion, and}_{excellent strength and stability at temperatures above 2,000°C.}

_{Customer specific furnace components and fixtures for high temperature furnaces are uniquely designed and are supplied by Getwick.}

_{Molybdenum and Tungsten Crucibles – Powder Metallurgy}

_{Pure Molybdenum (99.95% minimum)}

_{Mow Blend (percentages vary depending on customer requirements)}

_{Tungsten and Molybdenum Plate, Sheet, and Foil are used for:}

_{Seed Holders}

_{Heat Shields}

_{Heating Element Materials}

_{Other Support Components}

_{Molybdenum Sheet, Plate and Foil Products:}

_{Getwick produces a wide range of molybdenum and molybdenum alloy mill products using two primary consolidation methods; vacuum}_{arc-casting (AC) and powder metallurgy (PM). The availability of products from both of these established processes gives users many}_{options in selecting a material to satisfy their specific application requirements. Mill products available from either process include sheet,}_{plate and foil.}