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1. 发明公开

EP0380347A1 Superconducting oxide material and a method for producing the same 失效
标题翻译： SupraleitfähigesOxidmaterial und ein Verfahren zu seiner Herstellung。
公开(公告)号：EP0380347A1
公开(公告)日：1990-08-01
申请号：EP90300812.6
申请日：1990-01-25
申请人： The University of Tokyo
发明人： Uchida, Shinichi , Tokura, Yoshinori , Takagi, Hidenori
IPC分类号： C04B35/00 , H01L39/12
CPC分类号： H01L39/126 , C04B35/4504 , Y10S505/779
摘要： The disclosed superconducting oxide material has a crystal structure of either Nd₂CuO₄ type or oxygen-deficient perovskite type and mainly consists of a composition having a general chemical formula of (R 1-x A x ) m+1 Cu m O 3m+1-y , R being at least one rare earth element selected from the group consisting of Pr, Nd, Sm, Eu, Gd, Dy, Tb, Ho, Er, Tm, Yb, and Lu, A being Ce or Th, m being an integer of 1, 2, 3, ... ∞ (m=∞ standing for (R 1-x A x )CuO 3-y ), 0≦x≦1, 0≦y≦m, Cu in the material having an average valence of not larger than +2 for all R, A, m, x, and y.
The disclosed superconducting oxide material may have a general chemical formula of Nd 2-x-z Ce x Sr z CuO 4-y , 0≦x≦1, 0≦y≦1, and 0≦z≦1.
The above superconducting oxide material can be made by mixing powdery starting materials for the composition, sintering the mixture at 1,000 to 1,100°C in air, and heat treating the sintered mixture at 900 to 1,100°C in a reducing atmosphere (with an oxygen partial pressure of less than 10⁻² atm.)
摘要翻译：所公开的超导氧化物材料具有Nd2CuO4型或缺氧型钙钛矿型的晶体结构，主要由具有通式（R1-xAx）m + 1CmO3m + 1-y的化合物组成，R为至少一种稀有金属选自Pr，Nd，Sm，Eu，Gd，Dy，Tb，Ho，Er，Tm，Yb和Lu的地球元素，A是Ce或Th，m是1,2,3， ... INFINITY（m = INFINITY表示（R1-xAx）CuO3-y），0≤x≤1,0≤y≤m，平均化价为不是的材料中的Cu 对于所有R，A，m，x和y大于+2。所公开的超导氧化物材料可以具有通常的化学式为Nd 2-x-z C x Sr z CuO 4-y，0≤x≤1,0≤y≤1，0≤z≤1 。上述超导氧化物材料可以通过混合用于组合物的粉末原料，在空气中将混合物在1000-1100℃下烧结，并在还原气氛（含氧部分）中在900-1100℃下热处理烧结混合物压力小于10 大气压）

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