LANGASITE-TYPE OXIDE MATERIAL, METHOD FOR PRODUCTION THEREOF AND RAW MATERIAL USED IN PRODUCTION METHOD Russian patent published in 2015 - IPC C30B29/34 C30B15/08 C30B15/04 H01L41/18 

FIELD: chemistry.

SUBSTANCE: invention relates to techniques for producing oxide material having a langasite-type structure, which has potential as material for piezoelectric devices used at high temperatures. The oxide material has the composition AE₃TaGa_3-xAl_xSi₂O₁₄ (1) and AE₃NbGa_3-xAl_xSi₂O₁₄ (2), where AE is an alkali-earth metal element selected from a group consisting of Mg, Ca, Sr and Ba, and 0≤X≤3; and contains at least one element selected from a group consisting of Ir, Pt, Au and Rh, as an additive element. By adding at least one element selected from the group consisting of Ir, Pt, Au, and Rh to a raw material which is a composition used for producing the desired oxide material as an additive element, it is possible to control wettability between a matrix portion at the bottom portion of a crucible and a melt of the raw material, thereby carrying out stable production of the oxide material while controlling the wetting and spread of the melt of the raw material flowing out through a hole in the crucible.

EFFECT: invention enables to obtain an oxide material having a langasite-type structure, having the desired shape irrespective of the shape or material of the crucible.

15 cl, 8 dwg