Iridium Crucibles for Single Crystal Growth
Backed by extensive expertise in processing this demanding material, iridium crucibles are available with consistently homogeneous quality in a broad range of diameters and heights.
Only highly pure materials such as platinum, iridium, gold, and rhenium can be used to grow single crystals from oxide melts. The crucible shape is generally cylindrical. The melting temperature, the atmosphere and the composition of the melt determine the choice of material. For this reason, iridium crucibles are used at temperatures of up to approximately 2300° C to grow crystals with high melting temperatures, such as sapphire and YAG, for laser technology and the optical industry. In the crystal growing industry, precious metal crucibles, primarily platinum, platinum alloys, and iridium, are essential for melting high-purity oxide materials. Their high melting points, mechanical strength, and chemical inertness ensure the melt remains uncontaminated during high-temperature crystallization processes like the Czochralski (CZ) and Bridgman-Stockbarger methods.
Crucibles are fabricated in seamless and welded designs. Heraeus’ Platinum DPH (oxide dispersion stabilized) materials have proved particularly suitable for crystal growing in oxidizing atmospheres due to its higher strength and temperature resistance. Cylindrical crucibles are available in a variety of dimensions. Tell us about your intended application and benefit from a tailor-made crucible precisely matched to your requirements. Diameter, hight and thickness can be customized in all common alloy variations and DPH materials. Other forms and geometries can also be fabricated on request.
You want to know more about the technical properties of the materials? Explore the Material Database.
