Document Type and Number:
Japanese Patent JPH0436111
Kind Code:
B2
Abstract:
PURPOSE:To obtain the titled raw material containing a composition mainly consisting of a specific La, Ba and Cu and having K2NiF4 type crystal structure, useful for big electric appliance, etc., excellent in high temperature stability and having superconductivity at boiling point of liquid hydrogen or above. CONSTITUTION:Each powder of calculated amounts of reagent extra grade La2O3, BaCO3 and CuO are blended in an agate mortar, charged into a crucible and reacted, for example, in air at about 1,100 deg.C for about 10hr, ground and further reacted in air at about 1,100 deg.C for about 10hr, ground again and pressed at a pressure of about 1,000kg/cm<2> to form a pellet, which is then treated by a method such as sintering at about 1,000 deg.C, etc., to provide the titled raw material mainly containing a composition expressed by the formula (M is Ba; x is 0.04-0.20) and having K2NiF4 type crystal structure.
Inventors:
TANAKA SHOJI
KITAZAWA KOICHI
UCHIDA SHINICHI
TAKAGI HIDENORI
KITAZAWA KOICHI
UCHIDA SHINICHI
TAKAGI HIDENORI
Application Number:
JP741387A
Publication Date:
June 15, 1992
Filing Date:
January 17, 1987
Export Citation:
Assignee:
TOKYO DAIGAKU
International Classes:
C04B35/00; C01B3/02; C01G1/00; C01G3/00; C04B35/45; H01B12/00; H01L39/12; H01L39/24; H02K55/00
Next Patent: RIDING-TYPE VEGETABLE-TRANSPLANTATION MACHINE