|국가/구분||United States(US) Patent 등록|
|국제특허분류(IPC7판)||H01L-039/12 C01F-017/00 C01F-011/00 C01F-001/00|
|미국특허분류(USC)||505/1 ; 505/742 ; 505/737 ; 505/780|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 3 인용 특허 : 3|
A process for preparing the superconductive material MBa2Cu3Ox, M being, inter alia, yttrium and x being from about 6.5-7 and a precursor material MBa2Cu3Oy, y being from about 6-6.5, by controlled heating and cooling in a controlled atmosphere.
A process for preparing a powder comprising the orthorhombic phase having the formula MBa2Cu3Ox, wherein M is selected from the group consisting of Y, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, and Lu; and x being from about 6.5 to about 7, consisting essentially of the following steps: (a) forming an essentially carbon-free precursor powder of compounds of M, Ba and Cu, said Cu in the precursor powder of compounds of M, Ba and Cu, said Cu in the precursor powder having a valence of 1.6 to 2, by a process comprising mixing compounds of M, Ba and Cu, the quantit...