CRYSTAL MATERIAL AND METHOD FOR PRODUCING SAME

Title:

CRYSTAL MATERIAL AND METHOD FOR PRODUCING SAME

Document Type and Number:

WIPO Patent Application WO/2017/146244

Kind Code:

A1

Abstract:

The present invention clarifies the congruent composition of a langasite-type oxide and establishes a method for producing crystals of any desired composition of AE3ME1+a(Ga1-xAlx)3+bSi2+cO14 (AE is an alkaline earth metal, ME is Nb or Ta, 0 ≤ x ≤ 1, -0.5 < a ≤ 0 or 0 < a < 0.5, -0.5 < b ≤ 0 or 0 < b < 0.5, -0.5 < c ≤ 0 or 0 < c < 0.5; however, excluding when a = b = c = 0), whereby generation of impurities can be suppressed and the yield and crystal production rate can be improved. The raw material is a mixed raw material in which an alkaline earth metal or a carbonate or oxide thereof, Nb or Ta or an oxide thereof, Ga or an oxide thereof, Al or an oxide thereof, and Si or an oxide thereof are mixed.

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Inventors:

YOSHIKAWA AKIRA (JP)
YOKOTA YUUI (JP)
OHASHI YUJI (JP)
KAMADA KEI (JP)
KUDO TETSUO (JP)
INOUE KENJI (JP)
SHOJI YASUHIRO (JP)
IGARASHI YU (JP)
ARAKAWA MOTOTAKA (JP)
KUROSAWA SHUNSUKE (JP)
YAMAJI AKIHIRO (JP)

Application Number:

PCT/JP2017/007236

Publication Date:

August 31, 2017

Filing Date:

February 24, 2017

Export Citation:

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Assignee:

PIEZO STUDIO INC (JP)
UNIV TOHOKU (JP)

International Classes:

C30B29/34; C30B9/04; H01L41/187; H01L41/39

Foreign References:

CN104695018A	2015-06-10
JP2007176794A	2007-07-12
JP2002348197A	2002-12-04
JP2003246698A	2003-09-02
JP2008019122A	2008-01-31
JP2016047786A	2016-04-07

Other References: