GROWTH AND CHARACTERIZATION OF HOMOGENEOUS YBA2CU3O7-DELTA POWDERS PREPARED BY A FREEZE-DRYING METHOD

被引：12

作者：

KIMURA, Y ^{[1
]}

ITO, T ^{[1
]}

YOSHIKAWA, H ^{[1
]}

TACHIWAKI, T ^{[1
]}

HIRAKI, A ^{[1
]}

机构：

[1] DOSHISHA UNIV, DEPT CHEM ENGN, KYOTO 602, JAPAN

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 1990年 / 29卷 / 08期

关键词：

De-magnetization; Freeze-drying method; High T[!sub]c[!/sub]superconductor; Homogeneous powder; Y-B-C-O compound;

D O I：

10.1143/JJAP.29.L1409

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Homogeneous superconducting powders of YBa2Cu3O7-δhave been successfully prepared from a carbonate solution by means of a freeze-drying method. Sintered powders at 930°C were characterized by 100% volume fraction of the superconducting phase in measurements of field-cooled magnetization at 4.5 K in low fields (\lesssim2 Oe) using a SQUID magnetometer. It turned out that large plate-shaped grains (∼2×5×20 µm3) grew when the powders were heated in a short period (\gtrsim6 hours) and that the packing density was considerably high even without any pressing process. © 1990 IOP Publishing Ltd.

引用

页码：L1409 / L1411

页数：3

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