HOME    About this site    mypage    Japanese    library    university    Feedback

University of the Ryukyus Repository >
Faculty of Engineering >
Bulletin >
Bulletin of the Faculty of Engineering, University of the Ryukyus >
No. 38 (1989/09) >

 
Title :Y-Ba-Cu-O系高温超伝導体の電気的特性の格子定数および成形圧依存性
Title alternative :Effect of Forming Pressure and Lattice Constant on the Superconductivity of Y-Ba-Cu-O Compound
Authors :渡久地, 實
比嘉, 晃
屋良, 卓也
新垣, 修
山下, 崇
Authors alternative :Toguchi, Minoru
Higa, Akira
Yara, Takuya
Arakaki, Osamu
Yamashita, Takashi
Issue Date :Sep-1989
Abstract :High Tc Y-Ba-Cu-O superconductors were prepared by conventional sintering and annealing technique from calcined pellets which formed under pressure of 1, 2, 3, 4 ton/cm^2. It is found that the critical temperatures Tc of the specimens sintered in air are independent on the forming pressure but dependent on the lattice constant c. The lattice constants a and b are very stable under any preparated condition. And it is found by micrograph observation that the YBa_2Cu_3O_<7-x> specimen include many piller shaped single crystals is the high Tc (> 90 K) superconductor. Discussions are also given for the annealing treatment to the poor superconducting samples.
Type Local :紀要論文
ISSN :0389-102X
Publisher :琉球大学工学部
URI :http://hdl.handle.net/20.500.12000/5509
Citation :琉球大学工学部紀要 no.38 p.21 -30
Appears in Collections:No. 38 (1989/09)

Files in This Item:

File Description SizeFormat
No38p21.pdf1264KbAdobe PDFView/Open