Jul. 28, 1987
Feb. 02, 1989
【請求項1】La、BaおよびCuを、La:Ba:Cu=3-x:3+x:6(原子比)(0.4
IPC (5):
C04B 35/45 ZAA
, C01G 1/00
, C01G 3/00 ZAA
, H01B 12/00 ZAA
, H01L 39/12 ZAA
FI (5):
C04B 35/00 ZAA K
, C01G 1/00 S
, C01G 3/00 ZAA
, H01B 12/00 ZAA
, H01L 39/12 ZAA C
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