PRODUCTION OF LITHIUM NIOBATE SINGLE CRYSTAL

Title:

PRODUCTION OF LITHIUM NIOBATE SINGLE CRYSTAL

Document Type and Number:

Japanese Patent JPH01320294

Kind Code:

A

Abstract:

PURPOSE:To obtain an LiNbO3 single crystal having low defect density and uniform optical characteristics and usable as a superior nonlinear optical crystal by regulating the comps. of a melt so that an excess Li component is contained in a specified mol fraction. CONSTITUTION:When an LiNbO3 single crystal is grown from molten LiNbO3 by a pulling method, the Bridgman method, a zone melting method, a floating zone method or other method, the compsn. of the melt is regulated so that an excess Li component is contained in 0.53-0.62, preferably about 0.55-0.60mol fraction of Li2O/(Li2O+Nb2O3). The crystal is grown at 0.1-15, preferably 0.5-4.0mm/hr growth rate.

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Inventors:

KITAMURA KENJI
KIMURA SHIGEYUKI
II NOBUO
SAWADA TSUTOMU

Application Number:

JP15400088A

Publication Date:

December 26, 1989

Filing Date:

June 22, 1988

Export Citation:

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Assignee:

NAT INST RES INORGANIC MAT

International Classes:

C30B11/00; C30B13/00; C30B15/00; C30B29/30; (IPC1-7): C30B11/00; C30B13/00; C30B15/00; C30B29/30

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