Industrial - Crucibles - PMM

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Crucibles

Iridium and high purity crystal production

Industrial Iridium Crucible Banner

Lutetium oxyorthosilicate (LSO) and Gadolinium oxyorthosilicate (GSO) are scintillation crystals for medical scanners which are used in the diagnosis of tumours. Other applications for scintillator crystals include well logging in the petroleum industry and X-ray scanners for baggage and container screening.Due to its high melting point and resistance to chemical attack, iridium is the preferred material for crucibles used in the production of high purity single crystals of various metal oxides. Crucibles normally take the form of a cylindrical tube onto which a flat base is welded, and are manufactured in sizes from 30 cc to over 6,000 cc.

A variety of crystals are grown by a number of different techniques. The principal method of growth involves the pulling of a single crystal from a pool of molten salts contained in the crucible. There are five main types of crystal grown in iridium crucibles and they have a variety of applications.


YAG crystals

Yttrium aluminium garnet (YAG) crystals are widely used to make solid state lasers for medical purposes and for industrial laser welding and cutting.


Sapphire

Sapphire is used as a substrate for blue and green light emitting diodes (LEDs) in liquid crystal display backlighting for mobile phones and automotive displays, as windows for supermarket bar code scanners, as waveguides in surgical and dental lasers, in guided missile systems and for watch glass.


Lithium based crystals

Lithium tantalate and langasite are used in surface acoustic wave (SAW) filters which improve the performance of cellular telephones, satellite receivers and wireless communications equipment.


GGG crystals

Gadolinium gallium garnet (GGG) crystals are used for bubble memories in electronic systems. Largely superseded by semiconductor memories, they continue to be used in a military applications due to their ability to survive a nuclear blast, which would destroy most semiconductors.


LSO and GSO crystals

Gadolinium gallium garnet (GGG) crystals are used for bubble memories in electronic systems. Largely superseded by semiconductor memories, they continue to be used in a military applications due to their ability to survive a nuclear blast, which would destroy most semiconductors. Lutetium oxyorthosilicate (LSO) and Gadolinium oxyorthosilicate (GSO) are scintillation crystals for medical scanners which are used in the diagnosis of tumours. Other applications for scintillator crystals include well logging in the petroleum industry and X-ray scanners for baggage and container screening.