Title:
SUPERCONDUCTIVE MATERIAL
Document Type and Number:
Japanese Patent JPH07257961
Kind Code:
A
Abstract:
PURPOSE: To increase superconductivity transition temp. by incorporating mono- to tetravalent Nb.
CONSTITUTION: Oxide of mono- to tetravalent Nb is mixed with carbonate of Ca, Sr or Ba and this mixture is fired under a reaction at 1,050-1,200°C in vacuum to obtain the objective superconductive material based on a compsn. represented by the formula ANbxOy [where A is Ca, Sr or Ba, (x) is 0.2-4.0 and (y) is a value including the mean valence of mono- to 4.3-valent NB] and having a perovskite type crystal structure and ≥8K critical temp.
Inventors:
NAKAMURA AKIO
Application Number:
JP5174394A
Publication Date:
October 09, 1995
Filing Date:
March 23, 1994
Export Citation:
Assignee:
JAPAN ATOMIC ENERGY RES INST
International Classes:
C04B35/00; C01G1/00; C01G33/00; H01L39/12; (IPC1-7): C04B35/00; C01G1/00; C01G33/00; H01L39/12
Attorney, Agent or Firm:
Kyozo Yuasa (6 people outside)
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