PROCEDE D'ELABORATION D'UN MONOCRISTAL D'UN MATERIAU FERROELECTRIQUE

1506799 Growing a ferroelectric monocrystal COMPAGNIE GENERAL D'ELECTRICITE SA 18 May 1976 [6 June 1975] 20425/76 Heading BIS A monocrystal of ferroelectric material, e.g. lithium niobate with a substantially homogenous magnetic domain structure is formed by providing a melt of the ferroelectri...

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1. Verfasser:	JEAN-YVES BONIORT ET YVES FLOURY
Format:	Patent
Sprache:	fre
Schlagworte:	AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE APPARATUS THEREFOR BASIC ELECTRIC ELEMENTS CABLES CHEMISTRY CONDUCTORS CRYSTAL GROWTH ELECTRICITY INDUCTANCES INSULATORS MAGNETS METALLURGY PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE REFINING BY ZONE-MELTING OF MATERIAL SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE SINGLE-CRYSTAL-GROWTH TRANSFORMERS UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL
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Zusammenfassung:	1506799 Growing a ferroelectric monocrystal COMPAGNIE GENERAL D'ELECTRICITE SA 18 May 1976 [6 June 1975] 20425/76 Heading BIS A monocrystal of ferroelectric material, e.g. lithium niobate with a substantially homogenous magnetic domain structure is formed by providing a melt of the ferroelectric material, pulling a monocrystal from the melt and maintaining a continuous D.C. electric field along the crystal throughout the pulling operation and continuing to maintain the field until the crystal growth is complete and the grown crystal has cooled to below the magnetic transition temperature of the ferroelectric material, the grown crystal being left in contact with the melt at the end of the pulling until both the crystal and solidified melt have cooled below the magnetic transition temperature. Reference has been directed by the comptroller to Specification 1149492