ENCAPSULATION METHOD FOR THE SYNTHESIS OF NEARLY SINGLE-PHASE SUPERCONDUCTING HGBA2CA2CU3O8+DELTA WITH T(C)GREATER-THAN-OR-EQUAL-TO-135-K

被引：65

作者：

ISAWA, K

TOKIWAYAMAMOTO, A

ITOH, M

ADACHI, S

YAMAUCHI, H

机构：

[1] Superconductivity Research Laboratory, International Superconductivity Technology Center, Koto-ku, Tokyo, 135

来源：

PHYSICA C | 1994年 / 222卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(94)90111-2

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Nearly single-phase polycrystalline samples of HgBa2Ca2Cu3O8+delta were successfully synthesized under relatively simple and unprecedented synthesis conditions, i.e. at a ''low'' temperature ( < 700-degrees-C) and for a ''long'' period of time (5-168 h), using mono-oxide powders of Hg, Ba, Ca, and Cu as starting materials. A pressed powder mixture was heated t 665-degrees-C for approximately 75 h in an evacuated fused quartz tube, and then post-annealed in flowing O2 gas to exhibit a Meissner signal below 135.4 K. Zero resistance of this sample was observed at 133.9 K.

引用

页码：33 / 37

页数：5

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